title: Cortical activation in area 3b related to finger movement: an MEG study.
abstract: To evaluate cortical activation reflecting sensory feedback after finger movement, we recorded movement-related cerebral fields (MRCFs) following voluntary finger movement and somatosensory evoked fields for mixed (median) and pure cutaneous (radial) nerve stimulations (mSEFs and rSEFs) in six normal subjects. Equivalent current dipoles for movement-evoked field 1 (MEF1) in MRCFs and the component (70m) obtained in mSEFs, not clearly in rSEFs, were similarly distributed in each subject. They were located in area 3b, but both mean locations were significantly (p < 0.01) medial to N20m in mSEFs. MEF1 and 70m reflect similar cortical activities related to finger movement and have the same neuronal generator in area 3b, which is different from that of N20m.
authors.affiliation: Department of Neurosurgery, National Nishi-Niigata Central Hospital, 1-14-1 Masago, Niigata 950-2085, Japan. m.oishi@athena.ocn.ne.jp
authors.forename: Makoto
authors.initials: M
authors.lastname: Oishi
authors.forename: Shigeki
authors.initials: S
authors.lastname: Kameyama
authors.forename: Masafumi
authors.initials: M
authors.lastname: Fukuda
authors.forename: Kuniko
authors.initials: K
authors.lastname: Tsuchiya
authors.forename: Toru
authors.initials: T
authors.lastname: Kondo
mesh_terms: D000328:Adult; D002540:Cerebral Cortex / Q000502:physiology*; D005073:Evoked Potentials, Somatosensory / Q000502:physiology; D005260:Female; D005385:Fingers / Q000502:physiology*; D006801:Humans; D015225:Magnetoencephalography / Q000379:methods*; D008297:Male; D009068:Movement / Q000502:physiology*; D011930:Reaction Time / Q000502:physiology