Title |
Fingersomatotopy in area 3b: an fMRI-study
|
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Published in |
BMC Neuroscience, August 2004
|
DOI | 10.1186/1471-2202-5-28 |
Pubmed ID | |
Authors |
Danielle van Westen, Peter Fransson, Johan Olsrud, Birgitta Rosén, Göran Lundborg, Elna-Marie Larsson |
Abstract |
The primary sensory cortex (S1) in the postcentral gyrus is comprised of four areas that each contain a body map, where the representation of the hand is located with the thumb most laterally, anteriorly and inferiorly and the little finger most medially, posteriorly and superiorly. Previous studies on somatotopy using functional MRI have either used low field strength, have included a small number of subjects or failed to attribute activations to any area within S1. In the present study we included twenty subjects, who were investigated at 3 Tesla (T). We focused specifically on Brodmann area 3b, which neurons have discrete receptive fields with a potentially more clearcut somatotopic organisation. The spatial distribution for all fingers' peak activation was determined and group as well as individual analysis was performed. |
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