Article

Transcranial electrical stimulation and intraoperative neurophysiology of the corticospinal tract

Vedran Deletis, Francesco Sala and Sedat Ulkatan

in Oxford Handbook of Transcranial Stimulation

Published in print January 2008 | ISBN: 9780198568926
Published online November 2012 | | DOI: http://dx.doi.org/10.1093/oxfordhb/9780198568926.013.0008

Series: Oxford Library of Psychology

 Transcranial electrical stimulation and intraoperative neurophysiology of the corticospinal tract

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Transcranial electrical stimulation is a well-recognized method for corticospinal tract (CT) activation. This article explains the use of TES during surgery and highlights the physiology of the motor-evoked potentials (MEPs). It describes the techniques and methods for brain stimulation and recording of responses. There are two factors that determine the depth of the current penetrating the brain, they are: choice of electrode montage for stimulation over the scalp and the intensity of stimulation. D-wave collision technique is a newly developed technique that allows mapping intraoperatively and finding the anatomical position of the CT within the surgically exposed spinal cord. Different mechanisms may be involved in the pathophysiology of postoperative paresis in brain and spinal cord surgeries so that different MEP monitoring criteria can be used to avoid irreversible damage and accurately predict the prognosis.

Keywords: transcranial electric stimulation; corticospinal tract activation; motor-evoked potentials; brain stimulation; D-wave collision technique; pathophysiology

Article.  5470 words. 

Subjects: Psychology ; Neuropsychology ; Cognitive Neuroscience

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