Common sites for lumbar puncture and structures passing from the outside in

The puncture point, generally in two posterior pole attachment, between L3 and L4 or L4 and L5 clearance into the needle, needle should, in turn, through the skin, subcutaneous tissue, spines on the ligaments and spine between the spine, yellow ligament, ligament between epidural gap (including internal vertebral venous plexus, stiff backbone and arachnoid), into the subarachnoid space, and between the horsetail nerve root.

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