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Journal of the Korean Academy of Rehabilitation Medicine 2000;24(2):219-224.
The Motor Cortex Mapping Using Transcranial Magnetic Stimulation in Normal Subjects.
Jang, Sung Ho , Ahn, Sang Ho , Lee, Se Jin , Ha, Jung Sang , Lee, Ho , Lee, Jung Heon
1Department of Rehabilitation Medicine, Yeungnam University College of Medicine.
2Department of Neurology, Yeungnam University College of Medicine.
3Department of Rehabilitation Medicine, Bongseng Memorial Hospital.
4Department of Rehabilitation Medicine, Yeonsei University College of Medicine.
정상인에서 두부 자기자극을 이용한 대뇌운동피질 지도화
장성호, 안상호, 이세진1, 하정상1, 이호2, 이중헌3
영남대학교병원 재활의학과, 1신경과학교실 및 2봉생병원 재활의학과 및 3연세대학교 의과대학 재활의학교실
Abstract

Objective
To investigate the characteristics of the motor cortex map for abductor pollicis brevis muscle (APB) using transcranial magnetic stimulation (TMS) in normal subjects.


Method
Ten adults without neurological disorder were studied. A piece of cloth which marked at 1 cm interval was fixed on the head of the subject. The motor cortex mapping for APB was done with butterfly magnetic stimulator, and then with round magnetic stimulator.


Results
The average optimal scalp position for left APB was located on lateral 6.2 cm, anterior 0.1 cm from Cz and that for right APB was located on lateral ⁣6.0 cm, anterior 0.1 cm from Cz when stimulated with butterfly magnetic stimulator. The differences between hemispheres were less than 1 cm in the location of optimal scalp position and less than 10% in excitatory threshold (ET) irrespective of magnetic stimulator. The ipsilateral motor evoked potential (MEP) was not evoked in all subjects. The ET when stimulated with butterfly magnetic stimulator was higher to that when stimulated with round magnetic stimulator.


Conclusion
We conclude that TMS using butterfly and round magnetic stimulator is useful for the motor cortex mapping.

Key Words: Magnetic stimulation, Motor cortex, Mapping


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