Spinal Cord - Exam 1 Flashcards
(20 cards)
spinal cord extends from…
foramen magnum to L2 vertebrae
spinal cord ends in ________ where _______ begins
conus medullaris
cauda equina
3 meninges
dura mater
arachnoid mater
pia mater
dura mater
tough mother, durable outside membrane
arachnoid mater
has slide filaments between itself and pia mater
CSF flows beneath
pia mater
gentle mother, saran-wrap looking membrane around CNS, CSF flows above
filum terminale
pia mater extending from conus medullar is attaching to coccyx
stabilizes spinal cord in vertebral column
denticulate ligaments
extensions of pia mater attaching to dura mater laterally
stabilizes spinal cord laterally in vertebral foramen
cerebral spinal fluid
runs between the arachnoid and pia mater in the subarachnoid space
lumbar cistern is made of the meninges surroundings the cauda equina
good spot for lumbar puncture
epidural injection
outside of dura mater
lumbar puncture
through ligamentum flavum, dura mater and arachnoid mater to subarachnoid space
will encounter CSF
cervical and lumbar enlargements
spinal cord gets thicker in these areas because of limb innervation
spinal nerves
31 total (in pairs)
cervical nerves
8, exit above associated cervical vertebrae except #8 with exits under C7
thoracic nerves
12, exit below associated thoracic vertebrae
lumbar nerves
5, exit below associated lumbar vertebrae
sacral nerves
5, exit out sacral foramen or sacral canal
coccygeal nerves
1, exit out sacral canal
dermatomes
map of the areas of the skin innervated by each spinal nerve, helpful for localizing injury/pain
spinal cord structure terms to know (on quizlet)
gray and white matter
dorsal and vental horns
dorsal and ventral rootlets and roots
DRG
mixed nerve
dorsal and ventral primary rami
