三、足背部 (一)足背部的局部解剖 1.皮肤:足背部皮肤薄,活动性大。 2.皮下组织:疏松,又因位置低,故水肿时表现明显,皮下组织中走行足背静脉及大、小隐静脉的起始部。腓肠神经由外、后、下向远侧分布于足背及小趾外侧缘皮肤,腓浅神经分内外侧支,分布于足背其余大部分皮肤及趾背皮肤。(拇趾和第2趾相对缘除外)腓深神经在足背第1、2跖骨间穿出深筋膜,分布于拇趾与第2趾相对缘皮肤。 Third, the back of the foot (a) Partial anatomy of the back of the foot 1. Skin: Thin skin on the back of the foot, large mobility. 2. Subcutaneous tissue: loose, but also because of low position, so when the edema obvious performance, subcutaneous tissue walk dorsal veins and the beginning of small saphenous vein. The sural nerve is distributed distally and laterally to the outer edge of the dorsalis pedis and the little toe, and the lateral and lateral branches of the peroneal nerve are distributed in most of the skin and toe back of the dorsum of the foot. (Except for the opposite margin of the second toe), the deep peroneal nerve penetrates the deep fascia between the first and second metatarsals of the dorsal foot, and distributes in the skin opposite to the second toe.