spinal cord and neuronal pathways.

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created 9 years ago by Wcc2014
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1

spinal cord extends from the _______________ to
_______________

foramen magnum, L1 or L2

2

length and width of spinal cord

17 inches and 3/4 inches wide

3

spinal cord is surrounded by 3 layers of

meninges

4

spinal cord terminates in a tapering cone shaped structure called

conus medullaris

5

fibrous extension of the conus medullaris, that extends to the coccyx to keep it stable

filum terminal

6

saw-tooth shelves of piamater that attach to the dura mater to keep the cord stable

denticulate ligaments

7

the two regions of the spinal cord that are enlarged

cervical and lumbar

8

why are the cervical and lumbar regions enlarged

it's the place where the upper and lower limbs arise.

9

the collection of nerve roots at the inferior end of the vertebral canal is

cauda equina

10

neurons that reside in the ganglion and conducts impulses from the skin to the spinal cord where they synapse with another order neurons

first order ascending neurons

11

neurons that reside in the dorsal horn of the spinal cord or in medullary nuclei that transmit impulses to the thalamus or the cerebellum where they synapse

second order ascending neurons

12

neurons that have cell bodies in the thalamus and transmit impulses to the post central gyri of the cerebrum hemesphere

third order ascending neurons