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Repetition suppression for performed hand gestures revealed by fMRI by Antonia F. de C. Hamilton; Scott T. Grafton is a Neuroscience article available to read on EtoBox.

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## Abstract The functional components of the human motor system that are used to retrieve and execute simple intransitive hand gestures were identified with a repetition suppression (RS) paradigm. Participants performed movements with the right hand to text instructions in a rapid event related design with a pseudo‐random stimulus order. Brain areas associated with action retrieval were identified by comparing trials where an action was repeated to trials that involved a new action. Performance of a novel action, collapsed across individual actions, resulted in significantly greater activity in a left hemisphere predominant fronto‐parietal circuit involving inferior frontal gyrus and inferior parietal cortex (supramarginal gyrus). This is consistent with previous action retrieval tasks using go, no‐go paradigms and lesion studies of patients with apraxia that emphasize a role of these areas in action organization. In addition, RS effects were present in left primary sensorimotor cortex. These effects cannot be ascribed to kinematic differences, simple action related activity or differences of cognitive set. Significant RS effects for action retrieval could be identified with as lit

Who reads Repetition suppression for performed hand gestures revealed by fMRI?

Author

Antonia F. de C. Hamilton; Scott T. Grafton

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley; Research Square (ISSN 1065-9471)

Published

2008

Language

EN

Field

Neuroscience (Life Sciences)