Dorsal root of spinal nerve - wikipedia Dorsal root of spinal nerve Dorsal root of spinal nerve The formation of the spinal nerve from the dorsal and ventral roots Details Identifiers Latin nervi spinalis radix posterior MeSH D013126 TA A14. 2.00. 030 FMA 5980 Anatomical terminology ( edit on Wikidata ) The dorsal root of spinal nerve ( or posterior root of spinal nerve ) is one of two `` roots '' which emerge from the spinal cord. It emerges directly from the spinal cord, and travels to the dorsal root ganglion. Nerve fibres with the ventral root then combine to form a spinal nerve. The dorsal root transmits sensory information, forming the afferent sensory root of a spinal nerve. Contents 1 Structure 2 Additional images 3 See also 4 External links Structure The root emerges from the posterior part of the spinal cord and travels to the dorsal root ganglion. This contains the cell bodies of the nerve fibres contained in the root. The lateral division of the dorsal root contains lightly myelinated and unmyelinated fibres of small diameter. These carry pain and temperature sensation. These fibers cross through the anterior white commissure to form the anterolateral system in the lateral funiculus. The medial division of the dorsal root contains myelinated fibres of larger diameter. These transmit information of discriminative touch, pressure, vibration, and conscious proprioception originating from spinal levels C2 through S5. These fibers are pushed in towards the posterior median sulcus to form the gracile fasciculus and the cuneate fasciculus of the posterior column -- medial lemniscus pathway. If the dorsal root of a spinal nerve were severed it would lead to numbness in certain areas of the body. Additional images Cervical vertebra Medulla spinalis A spinal nerve with its anterior and posterior roots. The sensory tract. Diagrammatic transverse section of the medulla spinalis and its membranes. A portion of the spinal cord, showing its right lateral surface. The dura is opened and arranged to show the nerve roots. Scheme showing structure of a typical spinal nerve. See also Ventral root External links Anatomy figure : 02 : 04 - 06 at Human Anatomy Online, SUNY Downstate Medical Center - `` Superior view of a section through the spinal cord within the vertebral foramen. '' Anatomy Atlases - Microscopic Anatomy, plate 06.114 - `` Spinal Root Nerve Fibers '' Dorsal Root - Cell Centered Database Nervous tissue CNS Tissue Types Grey matter White matter Projection fibers Association fiber Commissural fiber Lemniscus Nerve tract Decussation Commissure Neuropil Meninges Cell Types Neuronal Pyramidal Purkinje Granule Glial insulating : Myelination : Oligodendrocyte other Astrocyte Radial glial cell Ependymal cells Tanycyte Microglia PNS General Dorsal Root Ganglion Ramus Ventral Root Ramus Ramus communicans Gray White Autonomic ganglion ( Preganglionic nerve fibers Postganglionic nerve fibers ) Nerve fascicle Funiculus Connective tissues Epineurium Perineurium Endoneurium Neuroglia Myelination : Schwann cell Neurilemma Myelin incisure Node of Ranvier Internodal segment Satellite glial cell Neurons / nerve fibers Parts Soma Axon hillock Axon Telodendron Axon terminals Axoplasm Axolemma Neurofibril / neurofilament Dendrite Nissl body Dendritic spine Apical dendrite / Basal dendrite Types Bipolar Unipolar Pseudounipolar Multipolar Interneuron Renshaw Afferent nerve fiber / Sensory neuron GSA GVA SSA SVA fibers Ia or Aα Ib or Golgi or Aα II or Aβ and Aγ III or Aδ or fast pain IV or C or slow pain Efferent nerve fiber / Motor neuron GSE GVE SVE Upper motor neuron Lower motor neuron α motorneuron β motorneuron γ motorneuron Termination Synapse Electrical synapse / Gap junction Chemical synapse Synaptic vesicle Active zone Postsynaptic density Autapse Ribbon synapse Neuromuscular junction Sensory receptors Meissner 's corpuscle Merkel nerve ending Pacinian corpuscle Ruffini ending Muscle spindle Free nerve ending Nociceptor Olfactory receptor neuron Photoreceptor cell Hair cell Taste bud Retrieved from `` https://en.wikipedia.org/w/index.php?title=Dorsal_root_of_spinal_nerve&oldid=825176016 '' Categories : Back anatomy Peripheral nervous system Hidden categories : Pages with unresolved properties Talk Contents About Wikipedia Català Čeština 한국어 日本 語 Polski Edit links This page was last edited on 11 February 2018, at 22 : 40 ( UTC ). About Wikipedia

Question: what happens when the dorsal root of a spinal nerve is cut
Answer: numbness in certain areas of the body