实用骶丛神经阻滞

骶丛（SacralPlexus）

由腰骶干（L4、L5）以及全部骶神经和尾神经的前支组成。为全身最大的脊神经丛。骶丛位于盆腔内，在骶骨及梨状肌前面，髂内动脉的后方。骶丛分支分布于盆壁、臀部、会阴、股后部、小腿以及足肌和皮肤。

Sacral plexus (SacralPlexus) by the lumbosacral dry (L4, L5) and all the sacral nerve and nerve of the former For the body's largest spinal nerve plexus The sacral plexus in the pelvic cavity, in front of the sacrum and piriformis, iliac artery in the rear Sacral plexus branches distributed in the basin wall buttocks perineal strands of the rear leg and foot muscles and skin