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Journal of the Korean Academy of Rehabilitation Medicine 2001;25(2):256-260.
Facilitation of Motor Evoked Potential by Stretching of Peripheral Nerve.
Ko, Myoung Hwan , Park, Eun Kyoung , Park, Sung Hee , Seo, Jeong Hwan , Kim, Yun Hee
1Department of Rehabilitation Medicine, Chonbuk National University Medical School.
2Research Institude of Clinical Medicine, Chonbuk National University Medical School.
말초신경의 신장에 따른 운동유발전위의 촉통
고명환, 박은경, 박성희, 서정환, 김연희
전북대학교 의과대학 재활의학교실, 임상의학 연구소

To investigate the effect of peripheral nerve stretching on motor evoked potentials (MEP) as a method of facilitation.

Twenty three normal healthy volunteers were enrolled. Transcranial magnetic stimulation (TMS) was applied to the contralateral scalp at 7 cm lateral to Cz using 90 cm round coil. Intensity of stimulation was adjusted to 90% of maximal stimulation intensity. Recording was done on the abductor pollicis brevis muscle in three different conditions; firstly resting state, secondly voluntary contraction of abductor pollicis brevis muscle, and lastly with stretching of median nerve. The onset latency and amplitude were obtained and compared between three conditions.

Result: The amplitude of MEP was significantly increased in the condition with muscle contraction and peripheal nerve stretching compared with resting state. The latency was shortened in the condition with muscle contraction with statistical significance and with peripheral nerve stretching without significance.

We concluded that stretching of peripheral nerve can be used as a method of facilitation of MEP. This method is considered to be useful especially for the patients with motor paralysis or poor cooperarion for voluntary contraction.

Key Words: Transcranial magnetic stimulation, Motor evoked potentials, Peripheral nerve stretching


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