spinal cord Flashcards
(50 cards)
what does the spinal cord run through
the vertebral canal
spinal cord functions
- sensory and motor innervation via the spinal nerves
- major center for reflexes
adult spinal cord
- extends to the conus medullaris
- spinal cord segments are superior to where their corresponding spinal nerves emerge through the intervertebral foramina
denticulate ligaments
lateral shelves of pia mater anchoring to dura
conus medullaris tapers into the ________ ________ tethered to the _________
cauda equina; coccyx
to which part of the spinal cord are the lateral horns unique
thoracic
how many pairs of spinal nerves are there
31
where do the spinal nerves attach
attach through dorsal and ventral nerve roots
where do the spinal nerves pass through
intervertebral foramina
how many spinal nerve pairs are there in the cervical spine
8 cervical
how many spinal nerve pairs are there in the thoracic spine
12 thoracic
how many spinal nerve pairs are there in the lumbar spine
5 lumbar
how many spinal nerve pairs are there in the sacral spine
5 sacral
how many spinal nerve pairs are there in the coccygeal spine
1 coccygeal
cauda equina
collection of nerve roots at inferior end of vertebral canal
cervical spinal nerves exit from ______ the respective vertebra
above
3 meningeal membranes of the spinal cord
- dura mater
- arachnoid mater
- pia mater
3 potential spaces of the spinal cord
- epidural space
- subdural space
- subarachnoid space
spinal cord protection
- bone
- CSF
what makes the spine flexible
lots of white matter = myelination = high fat levels = flexibility
spinal tap (lumbar puncture)
- needle introduced into subarachnoid space to collect CSF
- determine infectious and inflammatory disease
- control and detect CSF pressure
- anesthetic delivery
lumbar spine needs to be _________ so needle can pass between spinal processes
flexed
spinal reflex example
take hand back from hot pan, etc.
visceral motor of the gray matter
visceral motor = autonomic = involuntary = organs
