Basal ganglia - wikipedia Basal ganglia Basal ganglia Basal ganglia labeled at top right. Basal ganglia on underneath view of brain Details Part of Cerebrum Identifiers Latin nuclei basales MeSH A08. 186.211. 730.885. 105 NeuroNames hier - 206 NeuroLex ID Basal ganglia Dorlands / Elsevier n_11 / 12580456 TA A14. 1.09. 501 FMA 84013 Anatomical terms of neuroanatomy ( edit on Wikidata ) The basal ganglia ( or basal nuclei ) is a group of subcortical nuclei, of varied origin, in the brains of vertebrates including humans, which are situated at the base of the forebrain. Basal ganglia are strongly interconnected with the cerebral cortex, thalamus, and brainstem, as well as several other brain areas. The basal ganglia are associated with a variety of functions including : control of voluntary motor movements, procedural learning, routine behaviors or `` habits '' such as teeth grinding, eye movements, cognition, and emotion. The main components of the basal ganglia -- as defined functionally -- are the striatum ; both dorsal striatum ( caudate nucleus and putamen ) and ventral striatum ( nucleus accumbens and olfactory tubercle ), globus pallidus, ventral pallidum, substantia nigra, and subthalamic nucleus. Each of these components has a complex internal anatomical and neurochemical organization. The largest component, the striatum ( dorsal and ventral ), receives input from many brain areas beyond the basal ganglia, but only sends output to other components of the basal ganglia. The pallidum receives input from the striatum, and sends inhibitory output to a number of motor - related areas. The substantia nigra is the source of the striatal input of the neurotransmitter dopamine, which plays an important role in basal ganglia function. The subthalamic nucleus receives input mainly from the striatum and cerebral cortex, and projects to the globus pallidus. Popular theories implicate the basal ganglia primarily in action selection -- in helping to decide which of several possible behaviors to execute at any given time. In more specific terms, the basal ganglia 's primary function is likely to control and regulate activities of the motor and premotor cortical areas so that voluntary movements can be performed smoothly. Experimental studies show that the basal ganglia exert an inhibitory influence on a number of motor systems, and that a release of this inhibition permits a motor system to become active. The `` behavior switching '' that takes place within the basal ganglia is influenced by signals from many parts of the brain, including the prefrontal cortex, which plays a key role in executive functions. The importance of these subcortical nuclei for normal brain function and behavior is emphasized by the numerous and diverse neurological conditions associated with basal ganglia dysfunction, which include : disorders of behavior control such as Tourette syndrome, hemiballismus, and obsessive -- compulsive disorder ; dystonia ; addiction ; and movement disorders, the most notable of which are Parkinson 's disease, which involves degeneration of the dopamine - producing cells in the substantia nigra pars compacta, and Huntington 's disease, which primarily involves damage to the striatum. The basal ganglia have a limbic sector whose components are assigned distinct names : the nucleus accumbens, ventral pallidum, and ventral tegmental area ( VTA ). There is considerable evidence that this limbic part plays a central role in reward learning, particularly a pathway ( mesolimbic pathway ) from the VTA to the nucleus accumbens that uses the neurotransmitter dopamine. A number of highly addictive drugs, including cocaine, amphetamine, and nicotine, are thought to work by increasing the efficacy of this dopamine signal. There is also evidence implicating overactivity of the VTA dopaminergic projection in schizophrenia. Contents 1 Structure 1.1 Striatum 1.2 Pallidum 1.3 Substantia nigra 1.4 Subthalamic nucleus 1.5 Circuit connections 1.6 Neurotransmitters 1.7 Functional Connectivity 2 Function 2.1 Eye movements 2.2 Role in motivation 2.3 Decision making 2.4 Working memory 3 Clinical significance 4 History 4.1 Terminology 5 Other animals 6 See also 7 References 8 External links Structure In terms of development, the human central nervous system is often classified based on the original three primitive vesicles from which it develops : These primary vesicles form in the normal development of the neural tube of the embryo and initially include the prosencephalon, mesencephalon, and rhombencephalon, in rostral to caudal ( from head to tail ) orientation. Later in development of the nervous system each section itself turns into smaller components. During development, the cells that migrate tangentially to form the basal ganglia are directed by the lateral and medial ganglionic eminences. The following table demonstrates this developmental classification and traces it to the anatomic structures found in the basal ganglia. The structures relevant to the basal ganglia are shown in bold. Primary division of the neural tube Secondary subdivision Final segments in a human adult Prosencephalon Telencephalon Diencephalon On each side of the brain : the cerebral cortices, caudate, putamen Globus pallidus, ventral pallidum, thalamus, hypothalamus, subthalamus, epithalamus, subthalamic nucleus Mesencephalon Mesencephalon Mesencephalon ( midbrain ) : substantia nigra pars compacta ( SNc ), substantia nigra pars reticulata ( SNr ) Rhombencephalon Metencephalon Myelencephalon Pons and cerebellum Medulla Coronal slices of human brain showing the basal ganglia. White matter is shown in dark gray, gray matter is shown in light gray. Anterior : striatum, globus pallidus ( GPe and GPi ) Posterior : subthalamic nucleus ( STN ), substantia nigra ( SN ) The basal ganglia form a fundamental component of the cerebrum. In contrast to the cortical layer that lines the surface of the forebrain, the basal ganglia are a collection of distinct masses of gray matter lying deep in the brain not far from the junction of the thalamus. They lie to the side of and surround the thalamus. Like most parts of the brain, the basal ganglia consist of left and right sides that are virtual mirror images of each other. In terms of anatomy, the basal ganglia are divided into four distinct structures, depending on how superior or rostral they are ( in other words depending on how close to the top of the head they are ) : Two of them, the striatum and the pallidum, are relatively large ; the other two, the substantia nigra and the subthalamic nucleus, are smaller. In the illustration to the right, two coronal sections of the human brain show the location of the basal ganglia components. Of note, and not seen in this section, the subthalamic nucleus and substantia nigra lie farther back ( posteriorly ) in the brain than the striatum and pallidum. Striatum Main article : Striatum Basal ganglia The striatum is a subcortical structure generally divided into the dorsal striatum and ventral striatum, although a medial lateral classification has been suggested to be more relevant behaviorally and is being more widely used. The striatum is composed mostly of medium spiny neurons. These GABAergic projection neurons project to the external ( lateral ) globus pallidus and internal ( medial ) globus pallidus as well as the substantia nigra pars reticulata. The projections into the globus pallidus and substantia nigra are primarily dopaminergic, although enkephalin, dynorphin and substance P are expressed. The striatum also contains interneurons that are classified into nitrergic neurons ( due to use of nitric oxide as a neurotransmitter ), tonically active cholinergic interneurons, parvalbumin - expressing neurons and calretinin - expressing neurons. The dorsal striatum receives significant glutamatergic inputs from the cortex, as well as dopaminergic inputs from the substantia nigra pars compacta. The dorsal striatum is generally considered to be involved in sensorimotor activities. The ventral striatum receives glutamatergic inputs from the limbic areas as well as dopaminergic inputs from the VTA, via the mesolimbic pathway. The ventral striatum is believed to play a role in reward and other limbic functions. The dorsal striatum is divided into the caudate and putamen by the internal capsule while the ventral striatum is composed of the nucleus accumbens and olfactory tubercle. The caudate has three primary regions of connectivity, with the head of the caudate demonstrating connectivity to the prefrontal cortex, cingulate cortex and amygdala. The body and tail show differentiation between the dorsolateral rim and ventral caudate, projecting to the sensorimotor and limbic regions of the striatum respectively. Pallidum The pallidum consists of a large structure called the globus pallidus ( `` pale globe '' ) together with a smaller ventral extension called the ventral pallidum. The globus pallidus appears as a single neural mass, but can be divided into two functionally distinct parts, called the internal ( or medial ) and external ( lateral ) segments, abbreviated GPi and GPe. Both segments contain primarily GABAergic neurons, which therefore have inhibitory effects on their targets. The two segments participate in distinct neural circuits. The GPe, receives input mainly from the striatum, and projects to the subthalamic nucleus. The GPi, receives signals from the striatum via the `` direct '' and `` indirect '' pathways. Pallidal neurons operate using a disinhibition principle. These neurons fire at steady high rates in the absence of input, and signals from the striatum cause them to pause or reduce their rate of firing. Because pallidal neurons themselves have inhibitory effects on their targets, the net effect of striatal input to the pallidum is a reduction of the tonic inhibition exerted by pallidal cells on their targets ( disinhibition ) with an increased rate of firing in the targets. Substantia nigra Main article : Substantia nigra Location of the substantia nigra within the basal ganglia The substantia nigra is a midbrain gray matter portion of the basal ganglia that has two parts -- the pars compacta ( SNc ) and the pars reticulata ( SNr ). SNr often works in unison with GPi, and the SNr - GPi complex inhibits the thalamus. Substantia nigra pars compacta ( SNc ) however, produces the neurotransmitter dopamine, which is very significant in maintaining balance in the striatal pathway. The circuit portion below explains the role and circuit connections of each of the components of the basal ganglia. Subthalamic nucleus Main article : Subthalamic nucleus The subthalamic nucleus is a diencephalic gray matter portion of the basal ganglia, and the only portion of the ganglia that produces an excitatory neurotransmitter, glutamate. The role of the subthalamic nucleus is to stimulate the SNr - GPi complex and it is part of the indirect pathway. The subthalamic nucleus receives inhibitory input from the external part of the globus pallidus and sends excitatory input to the GPi. Circuit connections Further information : Cortico - basal ganglia - thalamo - cortical loop Connectivity diagram showing excitatory glutamatergic pathways as red, inhibitory GABAergic pathways as blue, and modulatory dopaminergic pathways as magenta. ( Abbreviations : GPe : globus pallidus external ; GPi : globus pallidus internal ; STN : subthalamic nucleus ; SNc : substantia nigra pars compacta ; SNr : substantia nigra pars reticulata ) The left side of Fig. 1 shows a region of the prefrontal cortex receiving multiple inputs from other regions, as cortico - cortical activity. The input from B is the strongest of these. The right side of Fig. 1 shows the input signals also being fed to the basal ganglia circuitry. The output from here, back to the same region, is shown to modify the strength of the input from B, by adding strength to the input from C thereby modifying the strongest signal from B to C. ( Thalamic involvement is implicit but not shown ). Multiple models of basal ganglia circuits and function have been proposed, however there have been questions raised about the strict divisions of the direct and indirect pathways, their possible overlap and regulation. The circuitry models has evolved since the first proposed model in the 1990s by DeLong in the parallel processing model, in which the cortex and substantia nigra pars compacta project into the dorsal striatum giving rise to an inhibitory indirect and excitatory direct pathway. The inhibitory indirect pathway involved the inhibition of the globus pallidus externus, allowing for the disinhibition of the globus pallidus internus allowing it to inhibit the thalamus. The direct or excitatory pathway involved the disinhibition of the thalamus through the inhibition of the GPe / SNr. However the speed of the direct pathway would not be concordant with the indirect pathway in this model leading to problems with it. To get over this, a hyperdirect pathway where the cortex sends glutamatergic projections through the subthalamic nucleus exciting the inhibitory GPe under the center surround model, as well as a shorter indirect pathway have been proposed. Generally, the basal ganglia circuitry is divided into a limbic, two associative ( prefrontal ), an oculomotor and one motor pathway. The motor and oculomotor are sometimes grouped into one motor pathway. The 5 general pathways are organized as follows : The motor loop involving projections from the supplementary motor area, arcuate premotor area, motor cortex and somatosensory cortex into the putamen, which projects into the ventrolateral GPi and caudolateral SNr which projects into the cortex through the ventralis lateralis pars medialis and ventralis lateralis pars orialis. The oculomotor loop involved projections from the frontal eye fields, the dorsolateral prefrontal cortex ( DLPFC ), and the posterior parietal cortex into the caudate, into the caudal dorsomedial GPi and ventrolateral SNr, finally looping back into the cortex through the lateral ventralis anterior pars magnocellularis ( VAmc ). The first cognitive / associative pathway proposes a pathway from the DLPFC, into the dorsolateral caudate, followed by a projection into the lateral dosomedial GPi, and rostral SNr before projecting into the lateral VAmc and medial pars magnocellularis. The second cognitive / associative pathway proposed is a circuit projecting from the lateral orbitofrontal cortex, the temporal gyrus, and anterior cingulate cortex into the ventromedial caudate, followed by a projection into the lateromedial GPi, and rostrolateral SNr before looping into the cortex via the medial VAmc and medial magnocellularis. The limbic circuit involving the projections from the ACC, hippocampus, entorhinal cortex, and insula into the ventral striatum, then into the rostrodorsal GPi, ventral palladium and rostrodorsal SNr, followed by a loop back into the cortex through the posteromedial part of the medial dorsal nucleus. However, more subdivisions of loops have been proposed, up to 20,000. The direct pathway, originating in the dorsal striatum inhibits the GPi and SNr, resulting in a net disinhibition or excitation of the thalamus. This pathway consist of medium spiny neurons ( MSNs ) that express dopamine receptor D1, muscarinic acetylcholine receptor M4, and adenosine receptor A1. The direct pathway has been proposed to facilitate motor actions, timing of motor actions, gating of working memory, and motor responses to specific stimuli. The ( long ) indirect pathway originates in the dorsal striatum and inhibits the GPe, resulting in disinhibition of the GPi which is then free to inhibit the thalamus. This pathway consists of MSNs that express dopamine receptor D2, muscarinic acetylcholine receptor M1, and adenosine receptor A2a. This pathway has been proposed to result in global motor inhibition ( inhibition of all motor activity ), and termination of responses. Another shorter indirect pathway has been proposed, which involves cortical excitation of the subthalamic nucleus resulting in direct excitation of the GPe, and inhibition of the thalamus. This pathway is proposed to result in inhibition of specific motor programs based on associative learning. A combination of these indirect pathways resulting in a hyperdirect pathway that results in inhibition of basal ganglia inputs besides one specific focus has been proposed as part of the center surround theory. This hyperdirect pathway is proposed to inhibit premature responses, or globally inhibit the basal ganglia to allow for more specific top down control by the cortex. The interactions of these pathways are currently under debate. Some say that all pathways directly antagonize each other in a `` push pull '' fashion, while others support the center surround theory, in which one focused input into the cortex is protected by inhibition of competing inputs by the rest of the indirect pathways. Main circuits of the basal ganglia. This diagram shows 2 coronal slices that have been superimposed to include the involved basal ganglia structures. The + and -- signs at the point of the arrows indicate whether the pathway is excitatory or inhibitory, respectively, in effect. Green arrows refer to excitatory glutamatergic pathways, red arrows refer to inhibitory GABAergic pathways and turquoise arrows refer to dopaminergic pathways that are excitatory on the direct pathway and inhibitory on the indirect pathway. Neurotransmitters The basal ganglia contains many afferent glutamatergic inputs, with predominantly GABAergic efferent fibers, modulatory cholinergic pathways, significant dopamine in the pathways originating in the ventral tegmental area and substantia nigra, as well as various neuropeptides. Neuropeptides found in the basal ganglia include substance P, neurokinin A, cholecystokinin, neurotensin, neurokinin B, neuropeptide Y, somatostatin, dynorphin, enkephaline. Other neuromodulators found in the basal ganglia include nitric oxide, carbon monoxide, and phenylethylamine. Functional connectivity The functional connectivity, measured by regional co-activation during functional neuroimaging studies, is broadly consistent with the parallel processing models of basal ganglia function. The putamen was generally coactivated with motor areas such as the Supplementary motor area, caudal Anterior cingulate cortex and Primary motor cortex, while the caudate and rostral putamen were more frequently coactivated with the rostral ACC and DLPFC. The ventral striatum was significantly associated with the amygdala and hippocampus, which although was not included in the first formulations of basal ganglia models, has been an addition to more recent models. Function Eye movements One intensively studied function of the basal ganglia is its role in controlling eye movements. Eye movement is influenced by an extensive network of brain regions that converges on a midbrain area called the superior colliculus ( SC ). The SC is a layered structure whose layers form two - dimensional retinotopic maps of visual space. A `` bump '' of neural activity in the deep layers of the SC drives an eye movement directed toward the corresponding point in space. The SC receives a strong inhibitory projection from the basal ganglia, originating in the substantia nigra pars reticulata ( SNr ). Neurons in the SNr usually fire continuously at high rates, but at the onset of an eye movement they `` pause '', thereby releasing the SC from inhibition. Eye movements of all types are associated with `` pausing '' in the SNr ; however, individual SNr neurons may be more strongly associated with some types of movements than others. Neurons in some parts of the caudate nucleus also show activity related to eye movements. Since the great majority of caudate cells fire at very low rates, this activity almost always shows up as an increase in firing rate. Thus, eye movements begin with activation in the caudate nucleus, which inhibits the SNr via the direct GABAergic projections, which in turn disinhibits the SC. Role in motivation Extracellular dopamine in the basal ganglia has been linked to motivational states in rodents, with high levels being linked to satiated `` euphoria '', medium levels with seeking, and low with aversion. The limbic basal ganglia circuits are influenced heavily by extracellular dopamine. Increased dopamine results in inhibition of the Ventral pallidum, entopeduncular nucleus, and substantia nigra pars reticulata, resulting in disinhibition of the thalamus. This model of direct D1, and indirect D2 pathways explain why selective agonists of each receptor are not rewarding, as activity at both pathways is required for disinhibition. The disinhibition of the thalamus leads to activation of the prefrontal cortex and ventral striatum, selective for increased D1 activity leading to reward. Decision making This section is transcluded from Cortico - basal ganglia - thalamo - cortical loop. ( edit history ) Two models have been proposed for the basal ganglia, one being that actions are generated by a `` critic '' in the ventral striatum and estimates value, and the actions are carried out by an `` actor '' in the dorsal striatum. Another model proposes the basal ganglia acts as a selection mechanism, where actions are generated in the cortex and are selected based on context by the basal ganglia. The CBGTC loop is also involved in reward discounting, with firing increasing with an unexpected or greater than expected reward. One review supported the idea that the cortex was involved in learning actions regardless of their outcome, while the basal ganglia was involved in selecting appropriate actions based on associative reward based trial and error learning. Working memory The basal ganglia has been proposed to gate what enters and what does n't enter working memory. One hypothesis proposes that the direct pathway ( Go, or excitatory ) allows information into the PFC, where it stays independent of the pathway, however another theory proposes that in order for information to stay in the PFC the direct pathway needs to continue reverberating. The short indirect pathway has been proposed to, in a direct push pull antagonism with the direct pathway, close the gate to the PFC. Together these mechanisms regulate working memory focus. Clinical significance Main article : Basal ganglia disease Basal ganglia disease is a group of movement disorders that result from either excessive output from the basal ganglia to the thalamus -- hypokinetic disorders, or from insufficient output -- hyperkinetic disorders. Hypokinetic disorders arise from an excessive output from the basal ganglia, which inhibits the output from the thalamus to the cortex, and this limits voluntary movement. Hyperkinetic disorders result from a low output from the basal ganglia to the thalamus which gives not enough inhibition to the thalamic projections to the cortex and this gives uncontrolled / involuntary movements. Dysfunction of the basal ganglia circuitry can also lead to other disorders. The following is a list of disorders that have been linked to the basal ganglia : Addiction Athetosis Athymhormic syndrome ( PAP syndrome ) Attention - deficit hyperactivity disorder ( ADHD ) Blepharospasm Bruxism Cerebral palsy : basal ganglia damage during second and third trimester of pregnancy Chorea Dystonia Fahr 's disease Foreign accent syndrome ( FAS ) Huntington 's disease Kernicterus Lesch -- Nyhan syndrome Major Depressive Disorder Obsessive - compulsive disorder Other anxiety disorders PANDAS Parkinson 's disease Spasmodic dysphonia Stuttering Sydenham 's chorea Tardive dyskinesia, caused by chronic antipsychotic treatment Tourette 's disorder Wilson 's disease History The acceptance that the basal ganglia system constitutes one major cerebral system took time to arise. The first anatomical identification of distinct subcortical structures was published by Thomas Willis in 1664. For many years, the term corpus striatum was used to describe a large group of subcortical elements, some of which were later discovered to be functionally unrelated. For many years, the putamen and the caudate nucleus were not associated with each other. Instead, the putamen was associated with the pallidum in what was called the nucleus lenticularis or nucleus lentiformis. A thorough reconsideration by Cécile and Oskar Vogt ( 1941 ) simplified the description of the basal ganglia by proposing the term striatum to describe the group of structures consisting of the caudate nucleus, the putamen, and the mass linking them ventrally, the nucleus accumbens. The striatum was named on the basis of the striated ( striped ) appearance created by radiating dense bundles of striato - pallido - nigral axons, described by anatomist Samuel Alexander Kinnier Wilson ( 1912 ) as `` pencil - like ''. The anatomical link of the striatum with its primary targets, the pallidum and the substantia nigra, was discovered later. The name globus pallidus was attributed by Déjerine to Burdach ( 1822 ). For this, the Vogts proposed the simpler `` pallidum ''. The term `` locus niger '' was introduced by Félix Vicq - d'Azyr as tache noire in ( 1786 ), though that structure has since become known as the substantia nigra, due to contributions by Von Sömmering in 1788. The structural similarity between the substantia nigra and globus pallidus was noted by Mirto in 1896. Together, the two are known as the pallidonigral ensemble, which represents the core of the basal ganglia. Altogether, the main structures of the basal ganglia are linked to each other by the striato - pallido - nigral bundle, which passes through the pallidum, crosses the internal capsule as the `` comb bundle of Edinger '', then finally reaches the substantia nigra. Additional structures that later became associated with the basal ganglia are the `` body of Luys '' ( 1865 ) ( nucleus of Luys on the figure ) or subthalamic nucleus, whose lesion was known to produce movement disorders. More recently, other areas such as the centromedian nucleus and the pedunculopontine complex have been thought to be regulators of the basal ganglia. Near the beginning of the 20th century, the basal ganglia system was first associated with motor functions, as lesions of these areas would often result in disordered movement in humans ( chorea, athetosis, Parkinson 's disease ). Terminology The nomenclature of the basal ganglia system and its components has always been problematic. Early anatomists, seeing the macroscopic anatomical structure but knowing nothing of the cellular architecture or neurochemistry, grouped together components that are now believed to have distinct functions ( such as the internal and external segments of the globus pallidus ), and gave distinct names to components that are now thought to be functionally parts of a single structure ( such as the caudate nucleus and putamen ). The term `` basal '' comes from the fact that most of its elements are located in the basal part of the forebrain. The term ganglia is a misnomer : In modern usage, neural clusters are called `` ganglia '' only in the peripheral nervous system ; in the central nervous system they are called `` nuclei ''. For this reason, the basal ganglia are also occasionally known as the `` basal nuclei ''. Terminologia anatomica ( 1998 ), the international authority for anatomical naming, retained `` nuclei basales '', but this is not commonly used. The International Basal Ganglia Society ( IBAGS ) informally considers the basal ganglia to be made up of the striatum, the pallidum ( with two nuclei ), the substantia nigra ( with its two distinct parts ), and the subthalamic nucleus, whereas Terminologia anatomica excludes the last two. Some neurologists have included the centromedian nucleus of the thalamus as part of the basal ganglia, and some have also included the pedunculopontine nucleus. Other animals See also : Primate basal ganglia system The basal ganglia form one of the basic components of the forebrain, and can be recognized in all species of vertebrates. Even in the lamprey ( generally considered one of the most primitive of vertebrates ), striatal, pallidal, and nigral elements can be identified on the basis of anatomy and histochemistry. The names given to the various nuclei of the basal ganglia are different in different species. In cats and rodents the internal globus pallidus is known as the entopeduncular nucleus. In birds the striatum is called the paleostriatum augmentatum and the external globus pallidus is called the paleostriatum primitivum. A clear emergent issue in comparative anatomy of the basal ganglia is the development of this system through phylogeny as a convergent cortically re-entrant loop in conjunction with the development and expansion of the cortical mantle. There is controversy, however, regarding the extent to which convergent selective processing occurs versus segregated parallel processing within re-entrant closed loops of the basal ganglia. Regardless, the transformation of the basal ganglia into a cortically re-entrant system in mammalian evolution occurs through a re-direction of pallidal ( or `` paleostriatum primitivum '' ) output from midbrain targets such as the superior colliculus, as occurs in sauropsid brain, to specific regions of the ventral thalamus and from there back to specified regions of the cerebral cortex that form a subset of those cortical regions projecting into the striatum. The abrupt rostral re-direction of the pathway from the internal segment of the globus pallidus into the ventral thalamus -- via the path of the ansa lenticularis -- could be viewed as a footprint of this evolutionary transformation of basal ganglia outflow and targeted influence. See also Neuroscience portal This article uses anatomical terminology ; for an overview, see Anatomical terminology. Alexander Cools Nathaniel A. Buchwald References ^ Jump up to : Stocco, Andrea ; Lebiere, Christian ; Anderson, John R. 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Jump up ^ DeLong, Mahlon ; Wichmann, Thomas ( 15 January 2017 ). `` Changing Views of Basal Ganglia Circuits and Circuit Disorders ''. Clinical EEG and neuroscience. 41 ( 2 ) : 61 -- 67. ISSN 1550 - 0594. PMC 4305332. Jump up ^ DeLong, Mahlon ; Wichmann, Thomas ( 15 January 2017 ). `` Update on models of basal ganglia function and dysfunction ''. Parkinsonism & related disorders. 15 ( Suppl 3 ) : S237 -- S240. doi : 10.1016 / S1353 - 8020 ( 09 ) 70822 - 3. ISSN 1353 - 8020. PMC 4275124. Jump up ^ Sian, J. ; Youdim, M.B.H. ; Riederer, P. ; Gerlach, M. Biochemical Anatomy of the Basal Ganglia and Associated Neural Systems. Jump up ^ Postuma, RB ; Dagher, A ( October 2006 ). `` Basal ganglia functional connectivity based on a meta - analysis of 126 positron emission tomography and functional magnetic resonance imaging publications ''. Cerebral cortex ( New York, N.Y. : 1991 ). 16 ( 10 ) : 1508 -- 21. doi : 10.1093 / cercor / bhj088. PMID 16373457. ^ Jump up to : Hikosaka, O ; Takikawa, Y ; Kawagoe, R ( 2000 ). `` Role of the basal ganglia in the control of purposive saccadic eye movements ''. Physiological Reviews. 80 ( 3 ) : 953 -- 78. PMID 10893428. Jump up ^ Redgrave, P. ; Prescott, T.J. ; Gurney, K. ( April 1999 ). `` The Basal Ganglia : A Vertebrate Solution to the Selection Problem ? ''. Neuroscience. 89 ( 4 ) : 1009 -- 1023. doi : 10.1016 / S0306 - 4522 ( 98 ) 00319 - 4. PMID 10362291. Jump up ^ Maia, Tiago V. ; Frank, Michael J. ( 15 January 2017 ). `` From Reinforcement Learning Models of the Basal Ganglia to the Pathophysiology Oof Psychiatric and Neurological Disorders ''. Nature Neuroscience. 14 ( 2 ) : 154 -- 162. doi : 10.1038 / nn. 2723. ISSN 1097 - 6256. PMC 4408000. Jump up ^ Hélie, Sébastien ; Ell, Shawn W. ; Ashby, F. Gregory ( 1 March 2015 ). `` Learning robust cortico - cortical associations with the basal ganglia : an integrative review ''. Cortex. 64 : 123 -- 135. doi : 10.1016 / j. cortex. 2014.10. 011. ISSN 1973 - 8102. PMID 25461713. Jump up ^ DeLong MR, Wichmann T ( January 2007 ). `` Circuits and circuit disorders of the basal ganglia ''. Arch. Neurol. 64 ( 1 ) : 20 -- 4. doi : 10.1001 / archneur. 64.1. 20. PMID 17210805. Jump up ^ Kempton MJ, Salvador Z, Munafò MR, Geddes JR, Simmons A, Frangou S, Williams SC ( 2011 ). `` Structural Neuroimaging Studies in Major Depressive Disorder : Meta - analysis and Comparison With Bipolar Disorder ''. Arch Gen Psychiatry. 68 ( 7 ) : 675 -- 90. doi : 10.1001 / archgenpsychiatry. 2011.60. PMID 21727252. see also MRI database at www.depressiondatabase.org Jump up ^ Radua, Joaquim ; Mataix - Cols, David ( November 2009 ). `` Voxel-wise meta - analysis of grey matter changes in obsessive -- compulsive disorder ''. British Journal of Psychiatry. 195 ( 5 ) : 393 -- 402. doi : 10.1192 / bjp. bp. 108.055046. PMID 19880927. ^ Jump up to : Radua, Joaquim ; van den Heuvel, Odile A. ; Surguladze, Simon ; Mataix - Cols, David ( 5 July 2010 ). `` Meta - analytical comparison of voxel - based morphometry studies in obsessive - compulsive disorder vs other anxiety disorders ''. Archives of General Psychiatry. 67 ( 7 ) : 701 -- 711. doi : 10.1001 / archgenpsychiatry. 2010.70. PMID 20603451. Jump up ^ Alm, Per A. ( 2004 ). `` Stuttering and the basal ganglia circuits : a critical review of possible relations ''. Journal of communication disorders. 37 ( 4 ) : 325 -- 69. doi : 10.1016 / j. jcomdis. 2004.03. 001. PMID 15159193. Jump up ^ Andrew Gilies, A brief history of the basal ganglia Archived 30 January 2005 at the Wayback Machine., retrieved on 27 June 2005 Jump up ^ Vieussens ( 1685 ) Jump up ^ Percheron, G ; Fénelon, G ; Leroux - Hugon, V ; Fève, A ( 1994 ). `` History of the basal ganglia system. Slow development of a major cerebral system ''. Revue neurologique. 150 ( 8 -- 9 ) : 543 -- 54. PMID 7754290. Jump up ^ Soltanzadeh, Akbar ( 2004 ). Neurologic Disorders. Tehran : Jafari. ISBN 964 - 6088 - 03 - 1. Jump up ^ Percheron, Gerard ; McKenzie, John S. ; Féger, Jean ( 6 December 2012 ). `` The Basal Ganglia IV : New Ideas and Data on Structure and Function ''. Springer Science & Business Media. Jump up ^ Percheron, G ; Filion, M ( 1991 ). `` Parallel processing in the basal ganglia : up to a point ''. Trends in Neurosciences. 14 ( 2 ) : 55 -- 9. doi : 10.1016 / 0166 - 2236 ( 91 ) 90020 - U. PMID 1708537. Jump up ^ Parent, Martin ; Parent, Andre ( 2005 ). `` Single - axon tracing and three - dimensional reconstruction of centre median - parafascicular thalamic neurons in primates ''. The Journal of Comparative Neurology. 481 ( 1 ) : 127 -- 44. doi : 10.1002 / cne. 20348. PMID 15558721. Jump up ^ Menasegovia, J ; Bolam, J ; Magill, P ( 2004 ). `` Pedunculopontine nucleus and basal ganglia : distant relatives or part of the same family ? ''. Trends in Neurosciences. 27 ( 10 ) : 585 -- 8. doi : 10.1016 / j. tins. 2004.07. 009. PMID 15374668. Jump up ^ Parent A ( 1986 ). Comparative Neurobiology of the Basal Ganglia. Wiley. ISBN 978 - 0 - 471 - 80348 - 5. Jump up ^ Grillner, S ; Ekeberg, O ; Elmanira, A ; Lansner, A ; Parker, D ; Tegner, J ; Wallen, P ( 1998 ). `` Intrinsic function of a neuronal network -- a vertebrate central pattern generator1 ''. Brain Research Reviews. 26 ( 2 -- 3 ) : 184 -- 97. doi : 10.1016 / S0165 - 0173 ( 98 ) 00002 - 2. PMID 9651523. Jump up ^ Peter Redgrave ( 2007 ) Basal ganglia. Scholarpedia, 2 ( 6 ) : 1825. External links Wikimedia Commons has media related to Basal ganglia. Imaging of Basal Ganglia at USUHS Models of Basal ganglia Jim Houk Scholarpedia 2 ( 10 ) : 1633. doi : 10.4249 / scholarpedia. 1633 The International Basal Ganglia Society Basal ganglia -- Official journal of LIMPE ( Lega Italiana per la Lotta Contro la Malattia di Parkinson, le Sindromi Extrapiramidali e le Demenze, Italy ), the German Parkinson Society ( DPG, Deutsche Parkinson Gesellschaft ), and the Japanese Basal Ganglia Society ( JBAGS Japan Basal Ganglia Society ) Rostral basal ganglia of the human brain and associated structures Basal ganglia Grey matter Striatum Dorsal striatum Putamen Caudate nucleus Ventral striatum Nucleus accumbens Olfactory tubercle Globus pallidus GPe GPi Other Amygdala Claustrum White matter Centrum semiovale Internal capsule Anterior limb Genu Posterior limb Optic radiation Corona radiata External capsule Extreme capsule Pallidothalamic tracts : Thalamic fasciculus Ansa lenticularis Lenticular fasciculus Subthalamic fasciculus Rhinencephalon Grey matter Anterior olfactory nucleus Anterior perforated substance Olfactory bulb White matter Olfactory tract Medial olfactory stria Lateral olfactory stria Olfactory trigone Other basal forebrain Grey matter Substantia innominata Nucleus basalis Nucleus of diagonal band White matter Diagonal band of Broca Stria terminalis Archicortex : Hippocampal formation / Hippocampus anatomy Grey matter Hippocampus proper CA1 CA2 CA3 CA4 Dentate gyrus Fascia dentata Subiculum White matter Alveus Fimbria Perforant path Schaffer collateral Obsessive -- compulsive disorder ( F42, 300.3 ) History Yale -- Brown Obsessive Compulsive Scale Biology Neuroanatomy Basal ganglia ( striatum ) Orbitofrontal cortex Cingulate cortex Brain - derived neurotrophic factor Receptors 5 - HT β 5 - HT 5 - HT μ Opioid NK NMDA Symptoms Obsessions ( associative diagnostic injurious scrupulous pathogenic sexual ) Compulsions ( impulses, rituals tics ) Thought suppression ( avoidance ) Hoarding ( animals, books possessions ) Treatment Serotonergics Selective serotonin reuptake inhibitors Escitalopram Fluoxetine Fluvoxamine Paroxetine Sertraline Citalopram Nefazodone Serotonin -- norepinephrine reuptake inhibitors Venlafaxine Desvenlafaxine Duloxetine Serotonin -- norepinephrine -- dopamine reuptake inhibitors Nefazodone Monoamine oxidase inhibitors Phenelzine Tranylcypromine Tricyclic antidepressants Clomipramine Serotonergic psychedelics Lysergic acid diethylamide Psilocin Atypical antipsychotics Aripiprazole Quetiapine Mu opioidergics Hydrocodone Morphine Tramadol Anticholinergics Diphenhydramine NMDA glutamatergics Riluzole NK - 1 tachykininergics Aprepitant Other Nicotine Memantine Tautomycin Behavioral Cognitive behavioral therapy ( Exposure and response prevention ) Organizations International OCD Foundation OCD Action Notable people Edna B. Foa Stanley Rachman Adam S. Radomsky Jeffrey M. Schwartz Susan Swedo Emily Colas Popular culture Literature / Comics Fictional Matchstick Men Plyushkin Xenocide Nonfiction Everything in Its Place Just Checking Media As Good as It Gets The Aviator Matchstick Men Adrian Monk `` $ pringfield '' Related Obsessive -- compulsive personality disorder Obsessional jealousy Primarily Obsessional OCD Relationship obsessive -- compulsive disorder Social anxiety disorder Tourette syndrome Retrieved from `` https://en.wikipedia.org/w/index.php?title=Basal_ganglia&oldid=814905862 '' Categories : Obsessive -- compulsive disorder Basal ganglia Motor system Biology of obsessive -- compulsive disorder Hidden categories : CS1 maint : Extra text : authors list Webarchive template wayback links All pages needing factual verification Wikipedia articles needing factual verification from December 2010 Wikipedia articles needing page number citations from December 2010 Medicine infobox template using Dorlands parameter Wikipedia articles needing clarification from February 2017 All articles with unsourced statements Articles with unsourced statements from February 2014 Use dmy dates from July 2013 Talk Contents About Wikipedia Български Bosanski Català Čeština Dansk Deutsch Ελληνικά Español فارسی Français 한국어 हिन्दी עברית Magyar Nederlands 日本 語 Norsk Polski Português Русский Simple English Slovenčina Srpskohrvatski / српскохрватски Suomi Svenska Tagalog Türkçe Українська 中文 Edit links This page was last edited on 11 December 2017, at 16 : 40. 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Question: where are the basal nuclei located what is their general function
Answer: at the base of the forebrain