Abstract
Yuichi YamashitaAtsushi MakiYoshitoshi ItoHitachi Ltd.Central Research LaboratoryKokubunji, Tokyo 185, JapanE-mail: yu-yama@crl.hitachi.co.jpEiju WatanabeYoshiaki MayanagiTokyo Metropolitan Police HospitalDepartment of NeurosurgeryTokyo 102, JapanHideaki KoizumiHitachi Ltd.Central Research LaboratoryKokubunji, Tokyo 185, JapanAbstract. We describe the functional topography of human brain activitydue to motor stimulation by using near-infrared spectroscopy. Finger mo-tion by each hand was used as the motor stimulation, and activity in theleft fronto-central region of the brain was measured. A greater change inoxyhemoglobin concentration due to brain activity during the stimulationwas obtained for the right hand than for the left hand. Localization of theactivity was obtained by topographically mapping the measured changesfor ten positions within the region. © 1996 Society of Photo-OpticalInstrumentation Engineers.
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