X Dura Mater:Z Outer most layer, Fibrous.

Arachnoid Mater: Middle layer, Non-vascular

Sub Arachnoid Space: (Target Area) L4-L5Z Lies between the arachnoid and pia

Pia Mater: Inner most layer, Highly vascular

  1. Ligament flavum is a strong, elastic, yellow membrane covering the interlaminar space between the vertebrae.

  2. Interspinal ligaments join the inferior and superior borders of adjacent spinous processes.

  3. Supraspinal ligament connects the spinous processes.