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Journal of the Korean Academy of Rehabilitation Medicine 2003;27(1):115-120.
Visualization of Disc Degeneration: Comparison between Magnetic Resonance Imaging and Discography.
Sohn, Min Kyun , Yang, Shin Seung , Ahn, Byung Hee , Yoon, Yong Soon
1Department of Rehabilitation Medicine, College of Medicine, Chungnam National University, Korea.
2Department of Rehabilitation Medicine, Presbyterian Medical Center, Korea.
실험적 근육통이 상지의 협조 작업 수행에 미치는 영향
손민균, 양신승, 안병희, 윤용순1
충남대학교 의과대학 재활의학교실, 1전주예수병원 재활의학과
Abstract
Objective
The purpose of this study was to investigate the influence of the muscle pain on the performance of motor coordination and muscular activities of upper limb according to the difficulty of activity and pain site.


Method
Experimental muscle pain was induced by the injections of 5% hypertonic saline in the upper trapezius and extensor carpi radialis longus in 20 healthy volunteers respectively. Coordinative work of upper extremity was performed through the computer simulation games which were controlled by the motion of forearm pronation and supination using the steering handle. The performance scores were measured during the tasks requiring the relatively high level (driving mode) and low level (tracking mode) of coordination. Electromyographic activities were measured from the pronator teres and biceps brachii simultaneously.


Results
The performance scores were decreased after induction of muscle pain in the high coordinative task and their decreasing rate was higher in the distal muscle pain. There were no statistical differences of electromyographic activities according to the intensity and pain site and level of coordination.


Conclusion
The upper limb coordination which required high speed and complex activities was decreased in the presence of the muscle pain. (J Korean Acad Rehab Med 2003; 27: 115-120)

Key Words: Experimental muscle pain, Coordination of upper limb, Electromyography


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