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

Leuthold, H. and Jentzsch, I. (2002) Distinguishing neural sources of movement preparation and execution: An electrophysiological analysis. Biological Psychology, 60(2&3), pp. 173-198.

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.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Leuthold, Prof Hartmut
• Authors: Leuthold, H., and Jentzsch, I.
• College/School: College of Science and Engineering > School of Psychology
• Journal Name: Biological Psychology