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Journal of the Korean Academy of Rehabilitation Medicine 1998;22(4):882-888.
The Usefulness of Cutaneous Silent Period in Diabetic Polyneuropathy.
Lee, Jong Min , Kwon, Yong Wook , Cho, Jong Hoon
Department of Rehabilitation Medicine, Dongguk University College of Medicine.
당뇨병성 신경병증에서 Cutaneous Silent Period의 유용성
이종민, 권용욱, 조종훈
동국대학교 의과대학 재활의학교실
Abstract

Objective
To evaluate the usefulness of cutaneous silent period(CSP) in assessing the pain sensory function mediated by the Aδ fiber in diabetic polyneuropathy and to define the proper CSP parameter and method.


Method
We studied 18 diabetic polyneuropathy patients and 20 age-matched healthy subjects. CSPs were recorded in the abductor pollicis brevis muscle and soleus muscle with the surface electrodes and a painful electrical stimulation was given to the mixed nerves(median and tibial nerve) and cutaneous nerve(ulnar and superficial peroneal nerve). Onset latency, end point and duration of CSP were compared between two groups. CSP parameters correlated with the motor and sensory nerve conduction parameters in diabetic polyneuropathy patients.


Results
CSP onset latency and end point were significantly delayed in diabetic polyneuropathy patients for both mixed nerve and cutaneous nerve stimulations. There was no difference in CSP duration between two groups. CSP onset latency was shortend and duration was prolonged in mixed nerve stimulation due to an antidromic collision, which showed a cutaneous nerve stimulation as the propor method. There was no correlation between the CSP parameters and motor and sensory nerve conduction parameters. In 3 cases, the CSPs were unable to the evoked despite the sensory nerve action potential was normally evoked. This suggests that the CSP would give an information about the Aδ fiber function than the large myelinated fiber.


Conclusion
This study indicates that the CSP is a useful supportive electrophysiologic study to assess the Aδ fiber function in diabetic polyneuropathy. The CSP onset latency and cutaneous nerve stimulation are the useful parameter and method for the CSP.

Key Words: Cutaneous silent period(CSP), Cutaneous silent period(CSP), Diabetic polyneuropathy, Aδfiber


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