Steady-State Movement-Related Potentials Evoked by Fast Repetitive Movements.

Autor: Kopp, Bruno, Kunkel, Annett, Müller, Gudrun, Mühlnickel, Werner, Flor, Herta
Zdroj: Brain Topography; Sep2000, Vol. 13 Issue 1, p21-28, 8p
Abstrakt: We investigated steady-state movement-related cortical potentials elicited by fast repetitive movements (1/sec@rpar; with 50-channel EEG. The experimental design comprised a comparison @lpar;a@rpar; between unilateral movements of the digits and the toes and (b) between metronome-paced and self-paced initiation of the movements. A distinct biphasic pattern of electrical activity following movement onset was observed, namely a frontal negative peak at a latency of 90 ms (post-MP100) and a frontal positive peak at a latency of 310 ms )post-MP300(. Pacing exerted its effects mainly on the amplitude and on the latency of the post-MP300. Source analysis revealed that both peaks could be modelled by a single source. The source locations were highly reproducible across the metronome-paced and self-paced conditions, and, they followed the expected somatotopic organisation. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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