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

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

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)43-47
Number of pages5
JournalNeuroscience Letters
Volume430
Issue number1
DOIs
Publication statusPublished - 03-01-2008
Externally publishedYes

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Functional Laterality
Cognition
Parietal Lobe
Near-Infrared Spectroscopy
Cerebrum
Frontal Lobe

All Science Journal Classification (ASJC) codes

  • Neuroscience(all)

Cite this

Shimoda, Nobuaki ; Takeda, Kotaro ; Imai, Itsuki ; Kaneko, Junichiroh ; Kato, Hiroyuki. / Cerebral laterality differences in handedness : A mental rotation study with NIRS. In: Neuroscience Letters. 2008 ; Vol. 430, No. 1. pp. 43-47.
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Cerebral laterality differences in handedness : A mental rotation study with NIRS. / Shimoda, Nobuaki; Takeda, Kotaro; Imai, Itsuki; Kaneko, Junichiroh; Kato, Hiroyuki.

In: Neuroscience Letters, Vol. 430, No. 1, 03.01.2008, p. 43-47.

Research output: Contribution to journalArticle

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