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Flashcards in Spinal Cord Deck (17)
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1

Dermatomes

-area of skin innervated by particular spinal nerve
-describe dermatome of limbs

2

Meninges

pia matter on cord
subarachnoid space
arachnoid matter
epidural space
dura matter
subdural space
bone

3

Grey vs White matter

grey = cell bodies (butterfly)
white = axons (myelinated)

4

Peripheral vs spinal vs segments

-Spinal cord > 2 rami (sensory and motor separate) > SPINAL NERVE (mixed)> goes through intervertebral foramen > PERIPHERAL NERVE
-segments of spinal nerve

5

naming of spinal nerves

-according to vertebrae where segment exists
-C: nerve exits ABOVE corresponding vert (8 nerves, 7 verts)
-everywhere else: nerve exits below

6

Phrenic Nerve - which roots?

C3,4,5

7

Sympathetic chain

T1-L2

8

S2-S4

pudendal, roots of splanchnic

9

name dermatome for:
back of head
shoulder
thumb
middle finger
pinky
nipples
umbilicus

head C2
C5
thumb: C6
middle finger: C7
pinky: C8
nipples: T4
umbilicus: T10

10

name dermatome for:
groin
knee
big toe
pinky toe
sole of foot
perianal

groin: L1
knee: L4
big toe: L5
pinky toe: S1
sole of foot S1
perianal: S5

11

where does spinal cord end, what is called?

L2 @ conus medullaris

12

What forms dura sac. where does it end?

dura and arachnoid matter
ends at S2

13

What is the lumbar cistern? describe and where?

-subarachnoid space bt arachnoid and pia matter after cord ended at L2
-contain CSF, cauda equina, filum terminale interna
-L2-S2

14

Filum interna
Filum externa

interna: in the lumbar cistern
externa: outside dura sac > coccyx
-anchoring

15

Denticulate ligaments

pia matter!
-anchor spinal cord to dura sac

16

what is in the epidural spce

fat, blood vessels

17

Distinguish bt levels of cross sections of spinal cord

-Cervical: large ventral horns (C5-T1 ad L2-S3 enlargements for limbs)
-Thorcaci: Intermediolateral cell column (T1-L2 for sympathetic pregang neurons)
-Lumbar: S2-S4 has IML for parasymp pregang N
-less white matter (bigger butterfly)