Lecture 7 - ANS Flashcards Preview

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Flashcards in Lecture 7 - ANS Deck (26):
1

how many fibers in a spinal nerve

4

2

what do we call nerves that can be found anywhere in the body

general

3

types of nerve fibers

general somatic afferent
general somatic efferent
general visceral afferent
general visceral efferent

4

what is housed in the DRG

cell bodies of afferent (somatic and visceral)

5

what does the ANS innervate (3)

smooth muscle, cardiac muscle, glands (VISCERAL!)

6

what fiber makes up autonomic

general visceral efferent

7

what smooth muscle structures does the ANS innervate

eye, bladder, erectile tissue, GI tract, arrector pili, blood vessels

8

what glands does the ANS innervate

sweat, salivary, lacrimal (tear), adrenal, liver

9

what is special about ANS

2 neuron system, PURELY motor

10

which neuron is myelinated in the ANS

preganglionic

11

sympathetic vs parasympathetic

sympathetic: thoracocolumbar (T1-L2)
parasympathetic: craniosacral (S2-S4)

12

what is the sympathetic division characterized by in terms of its fibers

short preganglionic fibers, long post ganglionic fibers

13

where does the sympathetic portion synapse

in paravertebral ganglia (in the sympathetic chain) or prevertebral ganglia

14

where in the prevertebral ganglia would the sympathetic system synapse

celiac, superior mesenteric, infererior mesenteric

15

what houses the cell bodies in the ANS

intermediolateral nucleus -- if you see this bump you know you're in T1-L2

16

to get to a prevertebral ganglion what would a neuron have to go through

splanchnic nerve

17

greater splanchnic nerve

T5-T9

18

lesser splanchnic nerve

T10-11

19

least splanchnic nerve

T12

20

lumbar splanchnic nerve

L1/L2

21

pelvic splanchnic nerve

S2-S4

22

which splanchnic nerves are in the sympathetic division

greater, lesser, least, lumbar

23

which splanchnic nerves are in the parasympathetic division

S2-S4

24

what cranial nerves innervate the parasympathetic

III, VIII, IX, X

25

vagus nerve

nerve X

26

the large intestine is innervated by

the cranial nerve (X) and pelvic splanchnic -- division is LEFT COLIC FLEXURE