Lumbar Spinal Stenosis (Lumbar Canal Stenosis)
Lumbar spinal stenosis is a low back condition whereby either the spinal canal (central stenosis) or one or more of the vertebral foramina (foraminal stenosis) become narrowed. The spinal canal is a tunnel like structure within the spine, while the vertebral foramina are small openings on the sides of each vertebra (spinal bone). The spinal cord travels through the spinal canal and small nerves coming off the spinal cord exit through the vertebral foramina transmitting signals to and from the buttocks and lower extremities.
Stenosis of the spinal canal or vertebral foramina can cause compression of the spinal cord or spinal nerves resulting in low back pain as well as buttock or leg pain, numbness and/or loss of function.