RESULTS Following an extensive review of selected studies from the 201 articles , the studies indicate that each of the psychotropic medications review ed impact alpha , beta , delta and theta waves independently and differently from each other .
Additionally , certain medications , particularly haloperidol and valproic acid , have dissimilar results exemplified in all waveforms .
OBJECTIVES It is known that psychotropic medications have an impact on the readings found in Electroencephalogram ( EEG ) .
In the field of psychiatry , there are several psychotropics utilized by clinicians .
This review seeks to investigate all the available data for psychotropic drugs and their impact on EEG changes .
Imaging the cortical effect of lamotrigine in patients with idiopathic generalized epilepsy: A low-resolution electromagnetic tomography (LORETA) study
PURPOSE Anatomical localization of the cortical effect of lamotrigine ( LTG ) in patients with idiopathic generalized epilepsy ( IGE ) . METHODS 19 patients with untreated IGE were investigated .  EEG was recorded in the untreated condition and 3 months later when LTG treatment abolished the seizures . 19-channel EEG was recorded , and a total of 2min artifact-free , waking EEG was processed to low-resolution electromagnetic tomography ( LORETA ) analysis . Activity ( that is , current source density , A/m(2 ) ) was computed in four frequency b and s ( delta , theta , alpha , and beta ) , for 2394 voxels that represented the cortical gray matter and the hippocampi . Group differences between the untreated and treated conditions were computed for the four b and s and all voxels by multiple t-tests for interdependent data sets . The results were presented in terms of anatomical distribution and statistical significance . RESULTS p<0.01 ( uncorrected ) changes ( decrease of activity ) emerged in the theta and the alpha b and s. Theta activity decreased in a large cluster of voxels including parts of the temporal , parietal , occipital cortex bilaterally , and in the transverse temporal gyri , insula , hippocampus , and uncus on the right side . Alpha activity decreased in a relatively smaller cortical area involving the right temporo-parietal junction and surrounding parts of the cortex , and part of the insula on the right side . CONCLUSIONS LTG  decreased theta activity in several cortical areas where abnormally increased theta activity had been found in a prior study in another cohort of untreated IGE patients [ Clemens , B. , Bessenyei , M. , Piros , P. , Tóth , M. , Seress , L. , Kondákor , I. , 2007b . Characteristic distribution of interictal brain electrical activity in idiopathic generalized epilepsy . Epilepsia 48 , 941 - 949 ] . These LTG-related changes might be related to the decrease of seizure propensity in IGE
RESULTS Following an extensive review of selected studies from the 201 articles , the studies indicate that each of the psychotropic medications review ed impact alpha , beta , delta and theta waves independently and differently from each other .
Additionally , certain medications , particularly haloperidol and valproic acid , have dissimilar results exemplified in all waveforms .
OBJECTIVES It is known that psychotropic medications have an impact on the readings found in Electroencephalogram ( EEG ) .
In the field of psychiatry , there are several psychotropics utilized by clinicians .
This review seeks to investigate all the available data for psychotropic drugs and their impact on EEG changes .