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Ocular dominance affects magnitude of dipole moment: an MEG study

2010; Lippincott Williams & Wilkins; Volume: 21; Issue: 12 Linguagem: Inglês

10.1097/wnr.0b013e32833ce5d7

1473-558X

Hiroshi Shima, Mitsuhiro Hasegawa, Osamu Tachibana, Motohiro Nomura, Junkoh Yamashita, Y. Ozaki, Jun Kawai, Masanori Higuchi, Hisashi Kado,

Vestibular and auditory disorders

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.