ERIC Number: EJ742411
Record Type: Journal
Publication Date: 2006-Aug
The Beat Goes on: Rhythmic Modulation of Cortical Potentials by Imagined Tapping
Osman, Allen; Albert, Robert; Ridderinkhof, K. Richard; Band, Guido; van der Molen, Maurits
Journal of Experimental Psychology: Human Perception and Performance, v32 n4 p986-1005 Aug 2006
A frequency analysis was used to tag cortical activity from imagined rhythmic movements. Participants synchronized overt and imagined taps with brief visual stimuli presented at a constant rate, alternating between left and right index fingers. Brain potentials were recorded from across the scalp and topographic maps made of their power at the alternation frequency between left and right taps. Two prominent power foci occurred in each hemisphere for both overt and imagined taps, one over sensorimotor cortex and the other over posterior parietal cortex, with homologous foci in opposite hemispheres arising from oscillations 180 [degree] out of phase. These findings demonstrate temporal isomorphism at a neural level between overt and imagined movements and illustrate a new approach to studying covert actions.
Descriptors: Brain, Cognitive Processes, Visual Stimuli, Brain Hemisphere Functions, Responses, Motion
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Publication Type: Journal Articles; Reports - Research
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