7.The most common type of lumbar spondylolisthesis is anterolisthesis, where a vertebra moves forward and narrows the spinal canal, causing compression of the nerves.
8.Alan Walker thinks the spinal canal didn't have the size and complexity to enable speech, that they probably would have communicated about as well as modern chimps.
10.The spinal cord is connected to the brain and travels through the spinal canal to the second lumbar vertebra, where it ends in a cone, called conus medullaris.
11.It's formed by the spinal nerves L4, L5 and S1, 2 and 3, which leave the spinal canal through the intervertebral foramen, an opening located between the vertebrae and behind intervertebral discs.
12.Now if you cut the spinal column in half lengthwise you can see that all the vertebral foramina together form the vertebral, or the spinal canal, which is occupied by the spinal cord.
13.Finally, any trauma to the spine, like the one caused by a car crash, gunshot, etc. can lead to nerve damage or compression directly, or by causing bleeding inside the spinal canal, causing compression via hematomas.
14.It can be congenital, meaning that the person is born with it, or acquired, usually due to degenerative disorders like ankylosing spondylitis, where the bones remodel causing intervertebral discs ossification, and the narrowing of the spinal canal.