대한임상전기생리학회지 (Journal of the Korean Academy of Clinical Electrophysiology)

대한임상전기생리학회 (The Korean Academy of Clinical Electrophysiology)
권호 표지

전기자극에 의한 근 수축이 V wave와 중앙주파수에 미치는 영향

The Effects of Muscle Contraction by Electrical Stimulation to V Wave and Median Frequency

  • 문달주 (동신대학교 대학원 물리치료학과) ;
  • 정대인 (동신대학교 대학원 물리치료학과) ;
  • 이정우 (동신대학교 대학원 물리치료학과) ;
  • 정진규 (정 가정의학과의원 물리치료실) ;
  • 김태열 (동신대학교 물리치료학과) ;
  • 오명화 (동신대학교 물리치료학과)
  • Mun, Dal-Ju (Dept. of Physical Therapy, Graduate School, Dongshin University) ;
  • Jeong, Dae-In (Dept. of Physical Therapy, Graduate School, Dongshin University) ;
  • Lee, Jung-Woo (Dept. of Physical Therapy, Graduate School, Dongshin University) ;
  • Jeong, Jin-Gyu (Dept. of Physical Therapy, Jeong's FM Clinic) ;
  • Kim, Tae-Youl (Dept. of Physical Therapy, Dongshin University) ;
  • Oh, Myung-Hwa (Dept. of Physical Therapy, Dongshin University)
  • 발행 : 2006.03.31
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초록

This study analyzed changes in action potential of supraspinal neuron and motor unit depending on maximum tolerance isometric contraction(MTIC) by electrical stimulation and examined influence of functional electrical stimulation (FES) on spinal neuron adaptation. It selected 40 university students in their twenties and divided into experimental groups of 25% MTIC(I), 50% MTIC I (II), 75% MTIC(III) and 100% MTIC(IV) depending on MTIC by electrical stimulation, and performed isometric contraction of plantar flexor muscle to each experimental group with given contraction for 20 times. It measured V/Mmax and MDF pre and post exercise, compared volume of contraction. 1. V/Mmax ratio showed no significant difference in comparison among experimental groups. 2. There was significant difference in median frequency of gastrocnemius and soleus in action potential motor unit according to comparison among experimental groups(p<.001). When contraction by electrical stimulation was maximum, change was greatest. This results suggest that muscle contraction by electrical stimulation was influence to action potential of spinal motor neuron system which appear optimal level though aspect and difference degree were not in accordance. Consequently, optimal stimulation level of MTIC(50%) by FES would be lead to central nerve adaptation. muscle contraction by electrical stimulation was influence highly to MDF which should be consider to fatigue of motor unit for muscle contraction by electrical stimulation.

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