The spinal cord punctures through 10 layers of structure

Spinal tap is also known as lumbar puncture and lumbar puncture

The needle should pass through the skin, subcutaneous tissue, the supraspinal ligament, the interspinous ligament between spinous processes, the ligamentum flavum, the epidural space (including the internal vertebral plexus, the dura mater and the arachnoid membrane), and enter the subarachnoid space between the cauda equina nerve roots. When the needle passes through the ligamentum flavum, the physician may feel a sense of breakthrough.

Subdivide subcutaneous tissue: superficial fascia, deep fascia

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