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Journal of the Korean Academy of Rehabilitation Medicine 2004;28(1):59-63.
Anatomical Factors Influencing the Stimulation Intensity of the Functional Electrical Stimulation of the Supraspinatus Muscle.
Lee, Seong Jae , Kwon, Bum Sun , Jun, Dong Jin , Kim, Byung Hee , Lee, Jee Young
1Department of Rehabilitation Medicine, Dankook University College of Medicine, Koera. rmlee@dankook.ac.kr
2Department of Diagnostic Radiology, Dankook University College of Medicine, Koera.
극상근의 기능적 전기자극에서 자극 강도에 영향을 미치는 해부학적 요인
이성재, 권범선, 전동진, 김병희, 이지영1
단국대학교 의과대학 재활의학교실 및 1진단방사선과학교실
Abstract
Objective
This study was designed to evaluate the contribution of anatomical factors to the stimulation intensity needed for functional electrical stimulation (FES) of shoulder girdle muscles, especially the supraspinatus.
Method
Anatomical dimensions, including the length of the arm and scapular spine, were measured in twenty three normal subjects. Depth and thickness of the supraspinatus and trapezius muscle were measured ultrasonographically. FES was applied for supraspinatus muscles, and the minimal intensity required to induce contraction was recorded. Correlations of intensity with the anatomical dimensions were investigated statistically.
Results
The thickness of the supraspinatus muscle and the length of the scapular spine showed statistically significant correlations with the minimal intensity for FES of supraspinatus muscles. No other anatomical measurements showed significant correlation.
Conclusion
The intensity required for FES was affected by the thickness and length of muscles, rather than other anatomical variables. The results of this study suggest that one of the major factors contributing to the determination of the intensity of FES is the size of muscles. If the intensity could be estimated before stimulation, based on the size of muscle, unnecessary discomfort of the patients would be avoided. (J Korean Acad Rehab Med 2004; 28: 59-63)
Key Words: Functional electrical stimulation, Shoulder, Supraspinatus


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