Subarachnoid
Subarachnoid
Subarachnoid (pronunciation: /ˌsuːbəˈræknɔɪd/) is a term used in anatomy to describe the space between the arachnoid mater and the pia mater, two of the three membranes that cover the brain and spinal cord. The term is derived from the Greek words "sub," meaning under, and "arachnoid," meaning like a spider's web.
The subarachnoid space is filled with cerebrospinal fluid (CSF), which provides a cushion for the brain and spinal cord, protecting them from injury. It also plays a role in the exchange of nutrients and waste products between the brain and the blood.
Related Terms
- Subarachnoid Hemorrhage: A type of stroke caused by bleeding into the subarachnoid space.
- Subarachnoid Cistern: An enlargement of the subarachnoid space where the CSF pools.
- Lumbar Puncture: A medical procedure where a needle is inserted into the subarachnoid space in the lower back to collect CSF for diagnostic purposes.
- Meninges: The three membranes that cover the brain and spinal cord, including the arachnoid mater.
- Cerebrospinal Fluid: The fluid that fills the subarachnoid space and cushions the brain and spinal cord.
See Also
External links
- Medical encyclopedia article on Subarachnoid
- Wikipedia's article - Subarachnoid
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