Neuroscience 2000 Abstract
| Presentation Number: | 458.17 |
|---|---|
| Abstract Title: | The readiness process in the brain associated with voluntary movements using an EEG-equivalent current dipole localization method. |
| Authors: |
Kita, Y.*1
; Mori, A.1
; Hiraba, H.1
; Nakaya, D.1
; Ibuki, M.1
1Nihon University, Tokyo, Japan |
| Primary Theme and Topics |
G. Motor Systems and Sensorimotor Integration - 86. Cortex and thalamus |
| Secondary Theme and Topics | G. Motor Systems and Sensorimotor Integration<br />- 93. Control of posture and movement |
| Session: |
458. Posture and movement: brain-machine interface Poster |
| Presentation Time: | Tuesday, November 7, 2000 8:00 AM-9:00 AM |
| Location: | Hall G-J |
| Keywords: | CURRENT DIPOLE, ELECTROENCEPHALOGRAGY (EEG), MOTOR CORTEX, HUMAN BRAIN |
This study investigated the brain activity associated with the unilateral wrist extension movement using EEG- equivalent current dipole localization. EEGs were recorded from 19ch on the scalp according to the international 10-20 system. EEGs were averaged during the period from 1.5 sec before to 0.5 sec after each agonist EMG onset. Movement-related cortical potential (MRCP) was analyzed by the equivalent current dipole localization, and then, the localization of dipole sources were projected onto the brain image of each subject using Magnetic Resonance Imaging (MRI).
In all subjects, current dipole sources were especially localized on the contralateral primary motor cortex to the limb movement. On the other hand, that were also localized on supplementary motor cortex (SMA), pre-motor cortex, parietal association area and so on. In these localization displacements on time series, some patterns were recognized. As a whole, the localization of SMA, the pre-motor cortex and the parietal association area were recognized prior to the localization of the contralateral motor cortex. The SMA and/or the pre-motor cortex were localized prior to localization of the contralateral motor cortex, but the temporal localization patterns of these areas were different among the subjects. Localization patterns of the parietal association area had two patterns, a) prior to localization of SMA/pre-motor cortex and b) with localization of that area.
It was suggested that, even with simple movements, these different readiness patterns in the brain might be occurred by difference of exercise experiences among the subjects.
In all subjects, current dipole sources were especially localized on the contralateral primary motor cortex to the limb movement. On the other hand, that were also localized on supplementary motor cortex (SMA), pre-motor cortex, parietal association area and so on. In these localization displacements on time series, some patterns were recognized. As a whole, the localization of SMA, the pre-motor cortex and the parietal association area were recognized prior to the localization of the contralateral motor cortex. The SMA and/or the pre-motor cortex were localized prior to localization of the contralateral motor cortex, but the temporal localization patterns of these areas were different among the subjects. Localization patterns of the parietal association area had two patterns, a) prior to localization of SMA/pre-motor cortex and b) with localization of that area.
It was suggested that, even with simple movements, these different readiness patterns in the brain might be occurred by difference of exercise experiences among the subjects.
Sample Citation:
[Authors]. [Abstract Title]. Program No. XXX.XX. 2000 Neuroscience Meeting Planner. New Orleans, LA: Society for Neuroscience, 2000. Online.
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