main article: Nervous system神經系統NS、痛
surface in traditional Chinese medicine is dermatomes in western medicine;inner in traditional Chinese medicine is motor organs of autonomic nerves in western medicine.
肝本身沒有痛覺神經,但是可能藉由轉移痛而因為肝區疼痛而知道肝有問題。
meridian system三陰三陽的經脈系統