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Journal of the Korean Academy of Rehabilitation Medicine 2003;27(2):255-259.
Interlimb Interaction at Different Angular Velocity in Isokinetic Knee Evaluation.
Kang, Seong Woong , Seok, Hyun , Kang, Yeon Seung , Moon, Jae Ho
1Department of Rehabilitation Medicine and Rehabilitation Institute of Muscular Disease, Yonsei University College of Medicine, Korea.
2Department of Rehabilitation Medicine, Soonchunhyang University College of Medicine, Korea. seok50503@daum.net
관절 등속성 운동검사에서 각속도에 따른 지간 상호작용
강성웅, 석현1, 강연승, 문재호
연세대학교 의과대학 재활의학교실 및 근육병 재활연구소, 1순천향대학교 의과대학 재활의학교실
Abstract
Objective
To investigate the influence of angular velocity on the interlimb interaction induced by movement patterns.


Method
Sixty healthy adult men performed five maximal isokinetic knee extension-flexion contractions in each of two contralateral leg stabilization conditions at different angular velocities. In the "Front condition", the test was done with a bar in front of the ankle joint of the non-testing leg. In the Fix condition", the non-testing leg was strapped and induced reciprocally to perform isometric contractions with respect to the testing leg. From the measured values, we calculated the strength difference ratio ([Peak Torque (PT) of "Fix condition"-PT of "Front condition"]⁓100/PT of "Front condition") at each angular velocity.


Results
By comparing the extensor strength, greater PTs were measured at the "Fix condition" in all tested angular velocities (p<0.01). For the flexor, the PTs of both conditions were similar. The strength difference ratio decreased as angular velocity increased (r=⁣0.48, p<0.01) in the extensor.


Conclusion
We could infer the crossed extension-flexion reflex is more apparent in the lower angular velocity than in higher one. (J Korean Acad Rehab Med 2003; 27: 255-259)

Key Words: Crossed extension-flexion reflex, Interlimb interaction, Angular velocity


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