目的　为穿支蒂足背中间皮神经营养血管皮瓣修复前足软组织缺损提供解剖基础。  方法　在30侧动脉内灌注红色乳胶的成人足标本上解剖观测：①足背中间皮神经的走行与分布；②足底弓第3足背穿支及其与足背中间皮神经营养血管间吻合关系。另在1侧新鲜标本上进行摹拟手术设计。  结果　①足背中间皮神经主要为腓浅神经外侧支的延续，经十字韧带表面，径直前行至第4跖骨间隙近端附近分为第3、4跖背支，分布于部分足背和趾背皮肤；②足背中间皮神经营养血管为多节段、多源性，与术式关系密切在第4跖骨间隙近端浅出的足底弓第3足背穿支位置相对恒定, 并分出众多的细小血管与足背中间皮神经干或旁营养血管链的分支密切吻合。  结论　可形成以足底弓第3足背穿支蒂足背中间皮神经营养血管皮瓣转位修复前足软组织缺损。

Objective　To provide anatomical basis of the perforator-based intermediate dorsal pedal neurocutaneous vascular flap for repair of soft tissue defects of the forefoot.　Methods　The following contents were investigated in 30 adult feet specimens perfused with red latex. ①The course and distribution of the intermediate dorsal cutaneous nerve. ②The 3rd dorsal perforator of the plantar arch and its anastomosis with the intermediate dorsal cutaneous neural nutrient vessels. Simulated operation was performed on another fresh specimen.　Results　①The intermediate dorsal cutaneous nerve mainly arose from the lateral branch of the superficial peroneal nerve. Crossing the surface of the cruciate ligament, it proceeded forward to the proximal part of the 4th metatarsal gap and then divided into the 3rd and 4th dorsal metatarsal branches, which were distributed in part of dorsal pedal and digital skin. ②The intermediate dorsal cutaneous neural nutrient vessels was multiple in segments and sources, which was closely related to operation type. The 3rd dorsal perforator of plantar arch had a relatively constant position located at the proximal part of the 4th intermetatarsal space. It gave out numerous tiny vessels which anastomosed closely with branches of intermediate dorsal cutaneous neural or paraneural nutrient vessel chain.　 Conclusion　The intermediate dorsal pedal neurocutaneous vascular flap based on the 3rd dorsal perforator of plantar arch could be transferred to repair the soft tissue defects of forefoot.