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Distinguishing neural sources of movement preparation and execution: An electrophysiological analysis

Research output: Contribution to journalArticle

Author(s)

H Leuthold, Ines Jentzsch

School/Research organisations

Abstract

The present study examined lateralized event-related potentials (L-ERPs) associated with movement preparation and execution. In a response precuing task that involved hand and foot movements a precue conveyed either information about side and effector, side alone, or no information. Advance movement preparation was indicated by RT shortening with increasing amount of precue information. L-ERPs revealed during the preparatory interval an initial parietal activity when movement side was precued. Later in the preparatory interval L-ERPs revealed a polarity inversion for foot versus hand movements when effector and side were specified in advance. This polarity inversion showed up also in execution-related L-ERP waveforms. Comparison of preparation- versus execution-related brain signals yielded topographic differences and dissimilar dipole sources for hand-related L-ERP activity. We take present findings to indicate that brain generators within the parietal lobe and anterior MI are hierarchically related to precue-induced motor preparation, whilst posterior MI is associated with motor execution functions. (C) 2002 Elsevier Science B.V. All rights reserved.

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Original languageEnglish
Pages (from-to)173-198
Number of pages26
JournalBiological Psychology
Volume60
Issue number2-3
DOIs
Publication statusPublished - Sep 2002

    Research areas

  • movement preparation, movement execution, lateralized readiness potential, reaction time, source localization, SUPPLEMENTARY MOTOR AREA, TRANSCRANIAL MAGNETIC STIMULATION, POSITRON-EMISSION-TOMOGRAPHY, SPATIOTEMPORAL DIPOLE MODEL, EVENT-RELATED POTENTIALS, PREMOTOR CORTEX, RESPONSE PREPARATION, ADVANCE INFORMATION, BRAIN POTENTIALS, FOOT MOVEMENTS

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