روش جديد تشخيص نشانگان تونل مچ دستي (كارپال تونل سندرم ) با استفاده از مقايسه پاسخ هاي حركتي اعصاب مديان و اولناز در ناحيه تنار

The difference between motor distal latency of median and ulnar nerve from thenar area in normal presons and patients with carpal tunnel syndrome

One of methods for CTS diagnosis is to compare distal motor latencies between mdian and ulnar nerves. In the previous research distal motor latency (DML) of ulnar nerve was recorded from hypothenar area and the median nerve DML was recorded from thenar. In this research we recorded DML of unlar nerve from thenar area and compared it with DML of median nerve. The aims of the research is to shorten the process of electrodiagnosis by preserving the sensitivity. The type of the research is diagnostic clinical trial on 42 normal person and 64 patients with CTS that referred to department of physical medicine & rehabilition of Shohada Tajrish hosptital in full and winter of 2000-2001 participated in this research. The result of the research is analayzed by student t-test method. The DML of unlar nerve recorded from thenar in normal persons was 3.52 ± 0.5 ms and the difference between median and ulnar nerve recorded from thenar was 1.23ms. The P-values of the study were less than 0.0001 that is significant thus this method can be used for diagnosis of CTS.