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Journal of the Korean Academy of Rehabilitation Medicine 1999;23(4):792-798.
Dorsomedial Cutaneous Nerve Conduction Study in Hallux Valgus.
Kim, Young Jun , Park, Insun , Kim, Dong Yook , Seo, Seung Seok , Kang, Dong Mug
1Department of Rehabilitation Medicine, Inje University College of Medicine.
2Department of Internal Medicine, Inje University College of Medicine.
3Department of Orthopedic Surgery, Inje University College of Medicine.
4Department of Occupational, Inje University College of Medicine.
5Department of Environmental Medicine, Inje University College of Medicine.
무지 외반증에서 무지 배내피신경 전도검사
김영준, 박인선, 김동욱1, 서승석2, 강동묵3
인제대학교 의과대학 재활의학교실, 1내과학교실, 2정형외과학교실, 3산업의학교실
Abstract

Objective
To show the prevalence of the dorsomedial cutaneous nerve (DMCN) injury in the hallux valgus and to evaluate whether the sensory nerve damage contributes to pain and sensory impairment in the great toe.


Method
Sixty feet of healthy adults (normal group) and 26 feet of patients with hallux valgus (hallux valgus group) were evaluated with sensory nerve conduction study of DMCN. The prevalence of the nerve injury was compared between the two groups. Sensory nerve action potentials of DMCN in hallux valgus feet were analyzed and compared according to the patient's symptom and the severity of the radiographic measurements of the feet.


Results
The prevalence of DMCN injury was 42.3% of the hallux valgus group. The peak latency of the DMCN sensory action potential of the symptomatic feet showed statistically significant delay compared to the asymptomatic group (p<0.05). Delay of the peak latency and decrement of the amplitude of the DMCN were statistically significant among the three groups as the valgus deformity worsened (p<0.05).


Conclusion
DMCN injury should be considered in addition to soft tissue injury or arthritis in the differential diagnosis of the pain, burning sensation or numbness associated with hallux valgus.

Key Words: Dorsomedial cutaneous nerve (DMCN), Nerve conduction study, Hallux valgus, Nerve injury


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