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Journal of the Korean Academy of Rehabilitation Medicine 2007;31(4):466-471.
H-reflexes in the Flexor Carpi Radialis with Facilitation and with Facilitation & Averaging: Normative Data.
Chung, Seung Hyun , Park, Young Sook , Woo, Kyoung Bong , Ryu, Dae Gul , Lim, Gyu Nam , Kim, Jong Hong
Department of Physical Medicine & Rehabilitation, Masan Samsung Hospital, Sungkyunkwan University School of Medicine, Korea. rdg3432@yahoo.co.kr
촉통과 평균화에 의한 요측 수근굴근의 H반사: 정상 한계치
정승현, 박영숙, 우경봉, 류대걸, 임규남, 김종홍
성균관대학교 의과대학 마산삼성병원 재활의학교실
Abstract
Objective
To determine the normal values of flexor carpi radialis (FCR) H-reflex without facilitation, with facilitation and with facilitation & averaging. And to compare the three methods.
Method
The FCR H-reflex was tested in 60 healthy people. 1) H-reflexes was recorded in the FCR muscle without facilitation. 2) H-reflexes was recorded in the FCR muscle with facilitation and facilitation was carried out by contracting the FCR muscle with 1 kg of weight. 3) FCR H-reflex was tested by repetitive stimulation with facilitation and the multiple responses were averaged.
Results
Without facilitation, FCR H-reflexes were elicited only in 24 people out of 60 people and with facilitation, FCR H-reflexes were elicited in all 60 people. The mean latencies and amplitudes of the three methods were measured and normal limits of latency difference and amplitude ratio were calculated. In the FCR H-reflex without facilitation, with facilitation and with facilitation & averaging, the normal limits of latency difference were 1.0 msec, 1.0 msec, 1.1 msec and normal limits of amplitude ration were 0.37, 0.22, 0.57.
Conclusion
FCR H-reflex with facilitation and with facilitation & averaging might be useful in the clinical diagnosis. (J Korean Acad Rehab Med 2007; 31: 466-471)
Key Words: H-reflex, Flexor carpi radialis, Facilitation
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