四肢為諸陽之本.脾實主之.然有上下左右內外之分焉.嘗觀經(jīng)脈篇.手之三陰.從臟走手.手之三陽.從手走頭.陽行于外.陰行于內.陽則自下而上.陰則自上而下.析而言之.左為陽.右為陰.上為陽.下為陰.手臂之在外者為陽.在內者為陰.自肩至肘曰 .自肘至腕曰臂.臂下謂之掌.掌下謂之指.其大指曰拇指.其次指曰食指.內屬太陰.外屬陽明.其中指曰將指.其屈而不伸者.曰無名指.內屬厥陰.外屬少陽.其小者.曰小指.內屬少陰.外屬太陽.此皆經(jīng)絡之行.即部位之分也.推而論之.男女有左右逆zxtf.net.cn從之異.經(jīng)絡有上下標本之殊.病癥有內外淺深之zxtf.net.cn/Article/辨.望之之法.可弗深究其理哉.以形言之.則形盛為有余.形瘦為不足.手之壅腫者為實.手之枯細者為虛.左右偏枯曰偏風.手指墮落曰癘風.手掌腫無紋.曰陰虛氣絕.手背腫至腕.曰陽虛氣結.此皆以形言也.以容言之.則強者.病氣實.痿者.形氣虛.撒手者.陽氣外脫.握手者.陰邪內伏.手之伸者.病在陽.手之屈者.病在陰.屈不易伸.伸不易屈者.陰陽交合.陰陽俱病也.屈而不伸.其病在筋.伸而不屈.其病在骨.汗漏不止.四肢微急者.亡陽之證.小腹急痛.手足拘攣者.將死之容.攣急轉筋者.邪氣實而傷于寒.弛縱不收者.正氣虛而因于熱.螈 不定者.筋脈相引而難瘳.振搖不定者.血氣俱虧而可療.兩手不舉者.脾實.四肢不收者.脾虛.掣衣?lián)P手者.煩躁猶可解.循衣摸床者.實熱已難除.叉手冒心者.血液大虧.交手目瞀者.肺病臂厥.捶胸者.脹悶之狀.拒按者.疼痛之容.手如數(shù)物者.風癇.手不欲動者.脾虧.指不用者.屬脈.臂不遂者.為痹.手足 習者.肝絕之形.手足 曳者.風懿之狀.此皆以容言也.于是合形容而診之.按經(jīng)絡而驗之審其寒溫.察其部位.參四診以究同異.分三因而辨本標.病癥之殊.療治之變.庶乎知所適從矣.