Peripheral nerve activity potential difference among TaiYang, TaiYin, ShaoYang and ShaoYin

Abstract Objects Explain the mechanism of PNAP Characteristic changes for each Korean Medicine Sasang typology. Methods By ways of question form and expert’s deliberation, 1000 healthy volunteers are distinguished into corresponding Sasang types, then detect median, ulnar, peroneal, tibial nerves’ CMAP and F-Wave, to analyze nerve conduction’s characteristic changes between groups or within group. Results ① Within group, TaiYin: Median nerve’s right side MCV is declined than left side; Ulnar and Peroneal and tibial nerve’s left side MCV is declined than right side. ShaoYang: Ulnar and tibial nerve’s left side MCV is declined than right side. ( P < 0.05 ). ② Between groups, TaiYin & ShaoYang: About median and tibial nerve’s Distal Amlitude ( DA ), MCV, TaiYin is declined than that of ShaoYang; TaiYin & ShaoYin: About tibial nerve’s DA, MCV, The shortest latency of F-wave ( FL ), TaiYin is declined or extended than that of ShaoYin; ShaoYang & ShaoYin: For median nerve’s MCV, FL, ShaoYin is declined or extended than that of ShaoYang ( P < 0.05 ). ③ Nerve amount rate of FL ≥ 2SD ( ShaoYang as standard), for peroneal and tibial nerves, TaiYin is greater than ShaoYang and ShaoYin ( P < 0.01). ④ Nerve amount rate which conduction is under-activity, for tibial nerve, TaiYin is greater than ShaoYin ( right ) and ShaoYang ( left ) ( P < 0.01). ⑤ AMP. / DUR. rate of median nerve: ShaoYin > ShaoYang > TaiYin ( P < 0.05 ). Conclusions Median nerve’s left side has advantage than right side, however the ulnar and tibial nerve’s right side is well than left side, this characteristic is much more obvious in TaiYin; PNAP of ShaoYang is well than TaiYin and ShaoYin; AMP. / DUR. rate of median nerve shows sensitively about constitutional differences. Significance Provide foundation of clinical diagnosis and treatment on a constitutional basis.