Cerebral laterality differences in handedness: A mental rotation study with NIRS.

Cerebral laterality differences in handedness: A mental rotation study with NIRS. Research Abstract Details 

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Cerebral laterality differences in handedness: A mental rotation study with NIRS. Abstract Text:

Nobuaki Shimoda,Kotaro Takeda,Itsuki Imai,Junichiroh Kaneko,Hiroyuki Kato,

Spatial cognition is right-hemisphere dominant in right-handers, but hemispheric laterality in left-handers is not fully understood. Using near-infrared spectroscopy, we compared cerebral activations in the frontal and parietal lobes during a mental rotation task between seven healthy right-handed and seven healthy left-handed women. Cerebral laterality during the spatial cognition task was evaluated as balance in the extent of activation areas between the two cerebral hemispheres, using the right-hemispheric dominance index (RI). RIs of right-handers showed right-hemispheric dominance (RI>0) in both frontal (RI=0.31+/-0.25) and parietal (RI=0.28+/-0.37) lobes, while left-handers showed slight left-hemispheric dominance (RI<0) in both frontal (RI=-0.13+/-0.18) and parietal (RI=-0.22+/-0.22) lobes. The left-handers exhibited significantly larger amplitudes of activation at the channels overlying the left-superior parietal lobule, whereas the right-handers did not show such amplitude differences. These findings suggest a difference in cerebral hemispheric laterality for spatial cognition between left- and right-handers.

Cerebral laterality differences in handedness: A mental rotation study with NIRS. Publishing Authors By Initials

N Shimoda,K Takeda,I Imai,J Kaneko,H Kato,

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Cerebral laterality differences in handedness: A mental rotation study with NIRS. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Neuroscience letters

VOLUME: 430

Page Numbers: 43-7

Journal Abbreviation: Neurosci. Lett.

ISSN: 0304-3940

DAY: 26

MONTH: 10

YEAR: 2007

Cerebral laterality differences in handedness: A mental rotation study with NIRS. Information

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LANGUAGE: eng

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AFFILIATION: Department of Occupational Therapy, International University of Health and Welfare, 2600-1 Kitakanemaru, Ohtawara 324-8501, Japan; CREST, Japan Science and Technology Agency, 4-1-8 Honcho, Kawaguchi 332-0012, Japan.

Country: Ireland

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MEDLINETA: Neurosci Lett

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