Spatiotemporal localization of Brain Activities on Recalling Body Names

Spatiotemporal localization of Brain Activities on Recalling Body Names Yoshinori Tanaka1) Takahiro Yamanoi1 )Mika Otsuki2) Hisashi Toyoshima3) Shin-ichi Ohnishi1) Toshimasa Yamazaki4) 1)Hokkai-Gakuen University 2)Hokkaido University 3)Japan Technical Software 4)Kyushu Institute of Technology abstruct The authors have measured electroencephaloglams (EEGs) from subjects observing an image of part of human body and recalling its name silently. The equivalent current dipole source localization (ECDL) method has been applied to those event related potentials (ERPs) : averaged EEGs. ECDs were localized to the primary visual area V1 around 100msec, to the interior temporal gyrus around 330msec, to the parahippocampal gyrus and hippocampus, the right angular gyrus, the corpus callosum, and then ECDs were localized to the Wernicke's area in the left hemisphere around 430msec. Then ECDs were localized to the left angular gyrus around 490msec, to the postcentral gyrus, and again to the parahippocampal gyrus (paraHip) around 600msec. Finally, ECDs were localized to the superior frontal gyrus around 630msec, to the frontal pole, and to the Broca's area around 725msec. From estimates of some activities on the paraHip and hippocampus, it is supposed to that searching and preservation in the memory have been done in the meantime.