Cortical potentials preceding voluntary elbow movement in recovered hemiparesis

Electroencephalography and Clinical Neurophysiology
J KitamuraT Takeuchi

Abstract

Scalp-recorded movement-related cortical potentials (MRCPs) preceding voluntary elbow flexion were studied in two hemiparetic patients 8 months after a stroke. Both cases had unilateral lenticular and internal capsular vascular lesion sparing the cortex. The motor recovery stage of their paretic arm remained in flexion or extension "synergistic" movements of shoulder, elbow, wrist and fingers. The NS' (negative slope) amplitude preceding voluntary unilateral elbow flexion of the intact arm showed a distinct preponderance over the contralateral precentral area, whereas NS' amplitude preceding flexion of the paretic arm was symmetrically maximal at bilateral precentral areas. It is postulated that the unilateral synergistic elbow flexion of the paretic arm is associated with an activation of bilateral brachial areas of the sensorimotor cortex (SI-MIs), whereas the isolated elbow flexion of the intact arm is associated with an activation of mainly the contralateral SI-MI.

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Citations

May 29, 1999·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·J KitamuraK Tashima
Jul 31, 2003·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Rolf VerlegerDetlef Kömpf
Nov 23, 2006·European Journal of Neurology : the Official Journal of the European Federation of Neurological Societies·C F EderD B Popović
Feb 26, 2014·Journal of Cognitive Neuroscience·Laura DipietroHermano I Krebs
Mar 10, 2012·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Alison L Smith, W Richard Staines
Feb 3, 2015·Frontiers in Human Neuroscience·Ozge YilmazAnder Ramos-Murguialday
Jan 1, 1997·European Journal of Paediatric Neurology : EJPN : Official Journal of the European Paediatric Neurology Society·Y MaegakiK Takeshita
Jun 11, 2005·Stroke; a Journal of Cerebral Circulation·Holger WieseMatthias Keidel
Jun 20, 2018·Nature Medicine·Dhakshin S RamanathanKarunesh Ganguly

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