Interhemispheric Asymmetry Exists in Female in the N100m Source Position of the Auditory Evoked Magnetic Fields Akitake Kanno 1 , Nobukazu Nakasato 2 , Keisaku Hatanaka 3 , Satoru Ohtomo 2 , Kyoko Suzuki 4 , Satoru Fujiwara 1 , Reizo Shirane 2 , Takashi Yoshimoto 2 1Ryogo Center, Kohnan Hospital 2Departments of Neurosurgery, Tohoku University School of Medicine 3Elekta K.K. 4Departments of Neuropsychology, Tohoku University School of Medicine Keyword: magnetoencephalography , auditory evoked magnetic fields , sex differences pp.367-371
Published Date 1998/4/1
DOI https://doi.org/10.11477/mf.1406901270
  • Abstract
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The N100m source of the auditory evoked mag-netic fields (AEFs) is located more posterior in the left than the right hemisphere in male subjects. However, whether this asymmetry exists in female subjects is controversial. The present study, anal-yzed the N100m source positions of the AEFs due to monaural tone stimuli using a helmet-shaped 66-channel magnetoencephalography system (CTF Systems) in 62 right-handed normal adults (24 females and 38 males). The best fit sphere was calculated for each subject from the head shape reconstructed from three-dimensional magnetic res-onance images.

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