Summary
This article deals with the estimation of event-related coherence (ERCoh) and its application to the planning and execution of self-paced index finger movement. ERCoh estimation complements the event-related desynchronization (ERD) measurements of rhythms within the alpha band. ERCoh yields information of the functional relationships between different brain areas as a function of time. The time resolution is 125 msec. Before movement onset a contralateral ERCoh increase was found between premotor and motor areas. This coherence increase was accompanied by an ERCoh decrease in parallel to the ERD over the contralateral centro-temporal areas. During movement, the ERD became bilaterally symmetrical. Simultaneously, interhemispheric coherence between contralateral and ipsilateral sensori-motor areas increased.
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Supported by the Austrian “Fonds zur Förderung der wissenschaftlichen Forschung” project S 49/02.
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Rappelsberger, P., Pfurtscheller, G. & Filz, O. Calculation of event-related coherence—A new method to study short-lasting coupling between brain areas. Brain Topogr 7, 121–127 (1994). https://doi.org/10.1007/BF01186770
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DOI: https://doi.org/10.1007/BF01186770