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Journal of the Korean Academy of Rehabilitation Medicine 1997;21(2):341-348.
Effects of Temperature on Motor Unit Action Potentials.
Sohn, Min Kyun , Bok, Soo Kyung , Yune, Seung Ho , Jang, Sun Ja
1Department of Rehabilitation Medicine, Chungnam National University College of Medicine, Korea.
2National Rehabilitation Center, Korea.
피부온도가 운동단위활동전위에 미치는 영향
손민균, 복수경, 윤승호, 장순자*
충남대학교 의과대학 재활의학교실, 국립재활원*

This study was performed to evaluate of temperature effects on motor unit action potentials by automatic method in twenty healthy adults. Twenty separate motor unit action potentials were recorded in the biceps brachii with concentric needle electrodes at the three different skin temperatures. The skin temperature of the arm was cooled with coldpack below 24oC and warmed with infrared above 38.5oC.

The measured parameters of motor unit action potentials were amplitude, duration, area, spike duration, spike area and number of phases and turns. As the skin temperature was decreased, all parameters except number of turns were increased(p<0.05). And the larger changes were developed by cooling than warming. At three temperature settings, rise time was inverse relationship with amplitude and number of phases and turns. And in general other parameters of motor unit action potentials showed significant positive correlation.

Therefore the temperature is a very important considering factor and must be standardized or controlied during analysis of motor unit action potentials.

Key Words: Motor unit action potentials, Temperature


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