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The Journal of Neuroscience, March 8, 2006, 26(10):2724-2731; doi:10.1523/JNEUROSCI.4739-05.2006
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Behavioral/Systems/Cognitive
Local Morphology Predicts Functional Organization of the Dorsal Premotor Region in the Human Brain
Céline Amiez, Penelope Kostopoulos, Anne-Sophie Champod, andMichael Petrides Cognitive Neuroscience Unit, Montreal Neurological Institute, McGill University, Montreal, Quebec, Canada H3A 2B4
Correspondence should be addressed to Dr. Céline Amiez, Cognitive Neuroscience Unit, Montreal Neurological Institute, McGill University, 3801 University Street, Montreal, Quebec, Canada H3A 2B4. Email: camiez{at}bic.mni.mcgill.ca
A confusing picture of the functional organization of the dorsal premotor region of the human brain emerged when functional neuroimaging studies that either examined visuomotor hand conditional activity or attempted to localize the human frontal eye field reported activity increases at the same general location, namely the junction of the superior precentral sulcus with the superior frontal sulcus. The present functional magnetic resonance imaging study examined visuomotor hand conditional activity and the locus of the frontal eye field as defined by a standard task, on a subject-by-subject basis, to clarify their location and reveal relationships between the pattern of local morphology and functional activity. The results demonstrate that visuomotor hand conditional activity and the frontal eye field lie within distinct parts of the superior precentral sulcus, revealing an organization of the human premotor cortex consistent with that observed in experimental studies in the monkey.
Key words: fMRI; dorsal premotor cortex; human; saccades; superior precentral sulcus; visuomotor conditional task
Received Nov. 4, 2005; revised Jan. 23, 2006; accepted Jan. 24, 2006.
Correspondence should be addressed to Dr. Céline Amiez, Cognitive Neuroscience Unit, Montreal Neurological Institute, McGill University, 3801 University Street, Montreal, Quebec, Canada H3A 2B4. Email: camiez{at}bic.mni.mcgill.ca
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