Ocular dominance affects magnitude of dipole moment: an MEG study.
To investigate whether the ocular dominance affects laterality in the activity of the primary visual cortex, we examined the relationship between the ocular dominance and latency or dipole moment measured by checkerboard-pattern and magnetoencephalography in 11 right-handed healthy male participants. Participants with left-eye dominance showed a dipole moment of 21.5+/-6.1 nAm with left-eye stimulation and 16.1+/-3.6 nAm with right, whereas those with right-eye dominance showed a dipole moment of 18.0+/-5.2 and 21.5+/-2.7 nAm with left-eye and right-eye stimulation of the infero-medial quadrant visual field, respectively. Thus, the dipole moment was higher when the dominant eye was stimulated, which implies that ocular dominance is regulated by the ipsilateral occipital lobe.
Shima
Hiroshi
H
Department of Neurosurgery, Graduate School of Medical Science, Kanazawa University, Japan.
Hasegawa
Mitsuhiro
M
Tachibana
Osamu
O
Nomura
Motohiro
M
Yamashita
Junkoh
J
Ozaki
Yuzo
Y
Kawai
Jun
J
Higuchi
Masanori
M
Kado
Hisashi
H
D001931:Brain Mapping / Q000379:methods; D004292:Dominance, Cerebral / Q000502:physiology; D023882:Dominance, Ocular / Q000502:physiology*; D005074:Evoked Potentials, Visual / Q000502:physiology*; D007839:Functional Laterality / Q000502:physiology; D006801:Humans; D015225:Magnetoencephalography / Q000379:methods*; D008297:Male; D010775:Photic Stimulation / Q000379:methods; D015348:Vision, Binocular / Q000502:physiology*; D014793:Visual Cortex / Q000033:anatomy & histology / Q000502:physiology*; D014794:Visual Fields / Q000502:physiology; D014795:Visual Pathways / Q000033:anatomy & histology / Q000502:physiology; D014796:Visual Perception / Q000502:physiology*