TY - JOUR
T1 - Cerebral laterality differences in handedness
T2 - A mental rotation study with NIRS
AU - Shimoda, Nobuaki
AU - Takeda, Kotaro
AU - Imai, Itsuki
AU - Kaneko, Junichiroh
AU - Kato, Hiroyuki
N1 - Funding Information:
We wish to express our deep gratitude to Dr. Daisuke Tsuzuki, Dr. Archana K. Singh and Dr. Ippeita Dan at the National Food Research Institute, Tsukuba, Japan, for their cooperation in the identification of recording sites and useful suggestions concerning the FDR method. This study was supported by CREST, Japan Science and Technology Agency.
PY - 2008/1/3
Y1 - 2008/1/3
N2 - 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.
AB - 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.
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U2 - 10.1016/j.neulet.2007.10.016
DO - 10.1016/j.neulet.2007.10.016
M3 - Article
C2 - 18023534
AN - SCOPUS:37549034591
VL - 430
SP - 43
EP - 47
JO - Neuroscience Letters
JF - Neuroscience Letters
SN - 0304-3940
IS - 1
ER -