Anatomy and Cell Biology 3319 Lecture Notes - Lecture 8: Cauda Equina, Conus Medullaris, Dorsal Root Ganglion

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Needs to be able to provide information to the brain: Input from body and sent to the brain: take commands from the brain and sent to the body, also some integration in the spinal cord. Conus medullaris: tied down to the sacrum, relatively soon on the spinal cord, l1 or l2: filum terminale: part of the coating of the spinal cord (dura), ties it to the sacrum. Wanting to get an anesthetic in we can do it at lumbar since it will not damage the spinal cord (since it has ended earlier on) and we can push nerves out of the way. Summary: the spinal cord lies within the vertebral canal. However, it only extends as far lumbar vertebra l1 or l2. These spinal nerves leave the spinal canal through the corresponding intervertebral foramina. Since the spinal cord is not as long as the vertebral column, the spinal nerves descending below the conus medullaris are known as the cauda equina.

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