The Motor Cortex Mapping Using Transcranial Magnetic Stimulation in Normal Subjects.
- Author:
Sung Ho JANG
1
;
Sang Ho AHN
;
Se Jin LEE
;
Jung Sang HA
;
Ho LEE
;
Jung Heon LEE
Author Information
1. Department of Rehabilitation Medicine, Yeungnam University College of Medicine.
- Publication Type:Original Article
- Keywords:
Magnetic stimulation;
Motor cortex;
Mapping
- MeSH:
Adult;
Butterflies;
Evoked Potentials, Motor;
Head;
Humans;
Motor Cortex*;
Nervous System Diseases;
Scalp;
Transcranial Magnetic Stimulation*
- From:Journal of the Korean Academy of Rehabilitation Medicine
2000;24(2):219-224
- CountryRepublic of Korea
- Language:Korean
-
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.
