What Is the Subarachnoid Space?
The subarachnoid space is a wide gap between the spinal arachnoid and the spinal membrane. The waist is the largest and contains cerebrospinal fluid. Lumbar puncture is usually performed in the 3rd to 4th or 4th to 5th lumbar spine. It is impossible to hurt the spinal cord here. The long cauda equina roots swim in the cerebrospinal fluid and are not easy to puncture. It is a safe place for waist wear.
Subarachnoid space
- Chinese name
- Subarachnoid space
- Foreign name
- subarachnoid space
- Location
- Between the arachnoid and spinal membrane of the spinal cord
- Contain
- Cerebrospinal fluid
- Common techniques
- Lumbar puncture
- The subarachnoid space is a wide gap between the spinal arachnoid and the spinal membrane. The waist is the largest and contains cerebrospinal fluid. Lumbar puncture is usually performed in the 3rd to 4th or 4th to 5th lumbar spine. It is impossible to hurt the spinal cord here. The long cauda equina roots swim in the cerebrospinal fluid and are not easy to puncture. It is a safe place for waist wear.
- Subarachnoid puncture: skin-subcutaneous-superspinous ligament-interspinous ligament-yellow ligament-epidural cavity-dura mater-arachnoid-subarachnoid space.
- The lower edge of the subarachnoid space: the lower part of the subarachnoid space, the subarachnoid space around the cauda nerve that is horizontally enlarged from the root of the cauda equina at the lower end of the spinal cord to the second sacrum.