第七頸椎神經根病變之H反射檢查評估

H-Reflex Study in Patients With C7 Radiculopathy

梅紹京(Sau-Chin Mei) ； 劉憶平(I-Ping Liu) ； 詹瑞棋(Rai-Chi Chan) ； 徐道昌(Tao-Chang Hsu)

《中華民國復健醫學會雜誌》 23卷2期 (1995/12) Pp. 111-116

摘要

H-reflexes of the flexor carpi radialis muscle were studied in 60 controls and 42 patients with C7 radiculopathy. Reflex parameters were compared to normal standards and correlated with clinical evaluations, radiologic and other electrophysiologic findings. The surface recording technique used was similar to that described in the previous report for the study of normal subjects.
The present data reveled: 1) Patients with C7 radiculopathy showed an abnormally prolonged latency of the FCR H-reflex. It increased from an average of 16.8±1.9 msec in normal subjects to 22.4±1.7 msec, p＜0.05. 2) The peak-to-peak amplitude of the H-reflex was significantly decreased from a normal value of 0.9±0.2mV to 0.1±0.02mV, p＜0.01 in subjects with C7 root lesion. 3) Similarly, the H-M latency also delayed from a normal mean of 13.7±1.2msec to 17.8±1.9msec in patient group, p＜0.05. 4) Bilateral latency difference increased from an average of ＜1 msec in normal subjects to 3.5~5.6 msec in patient group. These results indicate that FCR H-reflex is a useful and valid method for evaluating C7 radiculopathy.
This paper also discusses the changes in FCR H-reflex in six patients who had received operation. Repeat electrophysiological examinations of H-reflex after surgery provided valuable information about the prognosis of nerve root recovery.

關鍵字

橈側屈腕肌,H反射,C7神經根病變

並列摘要

H-reflexes of the flexor carpi radialis muscle were studied in 60 controls and 42 patients with C7 radiculopathy. Reflex parameters were compared to normal standards and correlated with clinical evaluations, radiologic and other electrophysiologic findings. The surface recording technique used was similar to that described in the previous report for the study of normal subjects.
The present data reveled: 1) Patients with C7 radiculopathy showed an abnormally prolonged latency of the FCR H-reflex. It increased from an average of 16.8±1.9 msec in normal subjects to 22.4±1.7 msec, p＜0.05. 2) The peak-to-peak amplitude of the H-reflex was significantly decreased from a normal value of 0.9±0.2mV to 0.1±0.02mV, p＜0.01 in subjects with C7 root lesion. 3) Similarly, the H-M latency also delayed from a normal mean of 13.7±1.2msec to 17.8±1.9msec in patient group, p＜0.05. 4) Bilateral latency difference increased from an average of ＜1 msec in normal subjects to 3.5~5.6 msec in patient group. These results indicate that FCR H-reflex is a useful and valid method for evaluating C7 radiculopathy.
This paper also discusses the changes in FCR H-reflex in six patients who had received operation. Repeat electrophysiological examinations of H-reflex after surgery provided valuable information about the prognosis of nerve root recovery.

並列關鍵字

fnexor carpi radiaus muscle ； H reflex,C7 radiculopathy