Central Canal, Epidural Space, and Subarachnoid Space in the Spinal Cord: A Guide to Spinal Fluids and Support

The hole running through the center of the spinal column is theepidural spacesubarachnoid spacecentral canalcentral antrum

central canal

The hole running through the center of the spinal column is called the central canal. This canal is a small channel that runs the length of the spinal cord and contains cerebrospinal fluid, which bathes and protects the spinal cord.

The epidural space is the space between the outermost layer of the spinal cord and the vertebral column. This space contains fat, connective tissue, and blood vessels.

The subarachnoid space is the space between the arachnoid mater and the pia mater, which are two of the three membranes that surround the brain and spinal cord. This space is filled with cerebrospinal fluid and provides cushioning and support for the spinal cord.

The central antrum is not a part of the spinal column. It is a cavity in the middle ear that connects to the mastoid air cells and helps to equalize pressure in the ear.

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