Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
9
pubmed:dateCreated
2009-8-27
pubmed:abstractText
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 little as 5 min of fMRI data and underscores the potential of using RS to characterize representational structure within the motor system.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
1097-0193
pubmed:author
pubmed:copyrightInfo
2008 Wiley-Liss, Inc.
pubmed:issnType
Electronic
pubmed:volume
30
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2898-906
pubmed:meshHeading
pubmed-meshheading:19117276-Adult, pubmed-meshheading:19117276-Brain Mapping, pubmed-meshheading:19117276-Cerebellum, pubmed-meshheading:19117276-Cerebral Cortex, pubmed-meshheading:19117276-Cognition, pubmed-meshheading:19117276-Decision Making, pubmed-meshheading:19117276-Frontal Lobe, pubmed-meshheading:19117276-Functional Laterality, pubmed-meshheading:19117276-Gestures, pubmed-meshheading:19117276-Hand, pubmed-meshheading:19117276-Humans, pubmed-meshheading:19117276-Magnetic Resonance Imaging, pubmed-meshheading:19117276-Motor Cortex, pubmed-meshheading:19117276-Motor Skills, pubmed-meshheading:19117276-Movement, pubmed-meshheading:19117276-Nerve Net, pubmed-meshheading:19117276-Neural Inhibition, pubmed-meshheading:19117276-Neural Pathways, pubmed-meshheading:19117276-Neuropsychological Tests, pubmed-meshheading:19117276-Parietal Lobe, pubmed-meshheading:19117276-Psychomotor Performance, pubmed-meshheading:19117276-Young Adult
pubmed:year
2009
pubmed:articleTitle
Repetition suppression for performed hand gestures revealed by fMRI.
pubmed:affiliation
School of Psychology, University of Nottingham, Nottingham, United Kingdom. antonia.hamilton@nottingham.ac.uk
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't, Research Support, N.I.H., Extramural