http://www.vin.com/proceedings/Proceedings.plx?CID=WSAVA2005&PID=11024&O=GenericHow might I find out what nerves are affected by compressing these vertebrae?
I don't know what specifically you are looking for.... a chart of the spine with nerves? Or more like what the nerves do when the vertebrae are compressed?
I don't know if that help (or even what in means in your dog's case), but that was a lot of typing.In the caudal cervical region over the fifth to seventh cervical vertebrae there is an enlargement of the spinal cord that nearly fills the canal. This is the cervical intumescence. Its presence is due to an increase in white matter and cell bodies that are associated with the innervation of the thoracic limb. The intumescence occurs from the sixth cervical segment of the spinal cord through the first thoracic segment. Another enlargment occurs in the midlumbar vertebral region for the innervation of the pelvic limb. The lumbar intumescence begins at about the fourth lumbar segment and gradually narrows caudally as the spinal cord comes to an end near the intervertebral space between the sixth and seventh lumbar vertebrae. The narrow end of the parenchyma of the spinal cord is known as the conus medullaris. The spinal cord terminates in the filum terminale, which is a narrow cord of meninges that may included a long extension of the neural tube and central canal. This attaches the conus medullaris to the caudal vertebrae. The cauda equina [Latin for horse tail, btw, because of its appearance] includes the conus medullaris together with the adjacent lumbar, sacral, and caudal roots that extend caudally in the vertebral canal....
All other spinal cord segments reside in the vertebral canal cranial to the vertebra of the same number. This is most pronounced in the caudal lumbar and sacrocaudal segments of the spinal cord. In general, the three sacral segments lie within the fifth lumbar vertebra and the caudal segments lie within the sixth lumbar vertebra. There is a breed variation in the length of the spinal cord. In small breeds it extends about one vertebra father caudally and in large breeds one vertebra farther cranially.
I know this is a very old thread, but do you remember what it was that ended up being wrong with your dog? Mine is having the same symptoms/behaviorThanks for that Maren. I'm flattered by your generous donation of time to look that up and write.
The essense of my question is would a slight narrowing of the L4-L6 area possibly create a pain that is perceived as a pain in the perianal area.
I have the pup with a definite perceived pain / annoyance in the perianal / base of tail area, and an x-ray showing the very slight narrowing. So I don't know if the two are necessarily related.