What Does the Needle Pass Through?

The needle passes through:

  1. Skin
  2. Subcutaneous tissues
  3. Supraspinous ligament – will grip the needle
  4. Interspinous ligament
  5. Ligamentum flavum – often feels hard or gritty
  6. Epidural space
  7. Dura
  8. Subarachnoid space (CSF)