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Lumbar side attic
侧隐窝位于侧椎管。其前面为椎体后缘,后面为上关节突前面与椎板和椎弓根连结处,外面为椎弓根的内面。内侧入口相当于上关节突前缘。侧隐窝为椎体孔两侧向外陷入部分,向外下方形成脊神经根通道,与椎间孔相续。侧隐窝是椎管最狭窄部分,为神经根的通道,其矢径越小,横径越大,表示侧隐窝越窄越深。侧隐窝狭窄卡压神经根是腰腿痛的原因之一。腰5椎间孔最易引起侧隐窝狭窄,原因是:①椎间孔多呈三叶形;②侧隐窝明显,矢径可小至2~3mm;③上关节突增生变形较多。