PMID: 3748346Aug 1, 1986Paper

Nonpyramidal motor activation produced by stimulation of the cerebellum, direct or transcranial: a cerebellar evoked potential

Neurosurgery
W J LevyD H York

Abstract

There is a need to monitor the functional status of the motor pathways well enough to predict the state of that function during operations and in injured or diseased patients. We previously reported that a motor evoked potential (MEP) can be produced by direct or transcranial stimulation of the motor cortex in both cats and humans. This signal descends through both the dorsolateral and ventral spinal cord and is primarily localized in the pyramidal tracts, producing a peripheral nerve signal and an electromyogram (EMG) response. It is more sensitive to injury than the somatosensory evoked potential (SEP). We report here that one can stimulate the cerebellar cortex, either directly or transcranially, and produce a descending signal in the spinal cord that has different characteristics from the MEP. The cerebellar evoked potential (CEP), located in the dorsolateral and the ventral cord, has an earlier latency and a faster conduction velocity than the MEP. It is predominantly ipsilateral with some contralateral components and also produces EMG responses. In the peripheral nerves, the CEP often produces a pattern of several waves that is different from the one or two predominant contralateral waves of the MEP. The CEP is not dimini...Continue Reading

Citations

Jan 5, 2002·Fukushima Journal of Medical Science·J NemotoN Kodama
Aug 4, 1999·Neurophysiologie clinique = Clinical neurophysiology·A Salerno, M Georgesco
Feb 21, 2013·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Pavel FilipMartin Bareš
May 19, 2012·Brain Research·Daniel Alvarez-FischerOliver Bandmann

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