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坐骨ischium),是构成四肢动物骨盆带的骨骼之一。

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人类而言,位于骨盆下方,共有两块。坐骨骨骼坚硬,分坐骨体和坐骨支两部分。坐骨体后端的骨突称作坐骨棘(与坐骨结节不同,坐骨结节在前部)。坐骨棘的后上方为坐骨大切迹。坐骨大切迹存在性别差异,女性坐骨大切迹宽而浅。

神经

坐骨神经英语Sciatic nerve(sciatic nerve)来自于腰椎骶骨。沿大腿后分支为胫骨神经和腓骨总神经,掌控小腿的肌肉群。

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