Spinal Canal

The spinal canal (or vertebral canal or spinal cavity) is the space in vertebrae through which the spinal cord passes. It is a process of the dorsal human body cavity. This canal is enclosed within the vertebral foramen of the vertebrae. In the intervertebral spaces, the canal is protected by the ligamentum flavum posteriorly and the posterior longitudinal ligament anteriorly.

The outermost layer of the meninges, the dura mater, is closely associated with the arachnoid which in turn is loosely connected to the innermost layer of the meninges, the pia mater. The meninges divide the spinal canal into the epidural space and the subarachnoid space. The pia mater is closely attached to the spinal cord. A subdural space is generally only present due to trauma and/or pathological situations. The subarachnoid space is filled with cerebrospinal fluid and contains the vessels that supply the spinal cord, namely the anterior spinal artery and the paired posterior spinal arteries, accompanied by a corresponding spinal veins. The spinal arteries form anastomoses known as the vasocorona of the spinal cord. The epidural space contains loose fatty tissue, and a network of large, thin-walled blood vessels called the internal vertebral venous plexuses.

The spinal canal was first described by Jean Fernel.

Read more about Spinal CanalAdditional Images

Other articles related to "spinal canal, spinal, canal":

Laminectomy
... spinous process, make up the posterior wall of the bony spinal canal ... is a tissue preserving surgery that leaves the muscles intact, spares the spinal process and takes only one or both lamina ... break the continuity of the rigid ring of the spinal canal to allow the soft tissues within the canal to expand (decompression), or (2) as one step in changing the ...
Claudication - Differential Diagnosis
... Spinal or neurogenic claudication may be differentiated from arterial claudication based on activity and position ... changes lead to increased stenosis (narrowing) of the spinal canal and compression of nerve roots and resultant lower extremity symptoms ... Standing and extension of the spine narrows the spinal canal diameter ...
Spondylolisthesis - Signs and Symptoms - Degenerative
... have a neural arch defect, meaning widening of the central spinal canal at the level of the slip ... translation of the vertebral body also causes narrowing of the central spinal canal at the level of the slip ... This narrowing of the canal has been termed the "napkin ring effect", an illustrative description as one imagines the spinal canal as a series of napkin ...

Famous quotes containing the word canal:

    My impression about the Panama Canal is that the great revolution it is going to introduce in the trade of the world is in the trade between the east and the west coast of the United States.
    William Howard Taft (1857–1930)