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Flashcards in autonomics and visceral afferents Deck (59)
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1

what is innervated by the visceral motor system

cardiac muscle
smooth muscle
glands

2

how many neurons are involved in the visceral motor system

2- pre and post

3

what does the visceral sensory system do

interoception (internal environment monitoring)
pain

4

what are the 2 parts of the visceral motor system

sympathetic
parasympathetic

5

what levels are sympathetic neurons
where are the cell bodies
where do they go in the brain

thoracolumbar
cell bodies of preganglionic neurons are in the IML horn
lateral and posteiror hypothalamus

6

what are the functions of the sympathetic nervous system

"fight or flight"
dilate pupils
piloerection
sweating
vasoconstriction
increase HR, RR
decrease gut and bladder mobility
central hyperreactivity
ejaculation

7

what are the options for sympathetic pre ganglion axons entering the sympathetic chain

synapse and leave at same level
ascend/descend, synapse and leave at that level
don't leave at all, form splanchnic nerves that synapse later

8

where do splanchnic nerves synapse

prevertebral ganglia

9

where are sympathetic post ganglion cell bodies

paravertebral or prevertebral ganglion

10

what organs are innervated by sympathetic neurons

heart
lungs
kidneys
ureters
GI tract
bladder
reproductive tract

11

what is special about the suprarenal gland

preganglionic fibers synapse directly onto chromatin cells

12

what levels are parasympathetic neurons
where are the cell bodies
where do they go in the brain

cervical and saccral regions
cranial nerves 3,7,8,10 and IML S2-4
anteiror and medial hypothalamus

13

function of parasympathetic nervous system

"rest and digest"
constrict pupil and airway
increase secretions
decrease HR
increase gut motility
contract bladder
decrease rage reaction
errection

14

where are the parasympathetic post ganglion cell bodies

in or near the target organ

15

what does the parasympathetic system not innervate

limbs
kidneys/ureters
adrenal glands
uterus and vagina
testis/ovary
skeletal muscle
blood vessels

16

what blood vessels do receive parasympathetic stimulation

coronary vessels
erectile tissue

17

sympathetic forgut

greater splanchnic nerve
celiac ganglion

18

sympathetic midgut

lesser splanchnic nerve
superior mesenteric ganglion

19

sympathetic kidneys and ureters

least and lumbar splanchnic nerves
aorticorenal ganlgion

20

sympathetic hindgut

lumbar splanchnic nerve
inferior mesenteric ganglion

21

sympathetic suprarenal medulla

greater, lesser, least splanchnic

22

sympathetic suprarenal cortex

greater, lesser, least splanchnic
aorticorenal ganglion

23

sympathetic pelvic organs

lumbar splanchnics via hypogastric plexuses
sacral splanchnics via inferior hypogastric plexus

24

parasympathetic foregut and midgut

vagus

25

parasympathetic hindgut

pelvic splanchnics

26

visceral pain afferent foregut, midgut, descending colon, 1/2 sigmoid, pelvic pain line, kidneys ureters

sympathetics

27

visceral pain afferets: distal sigmoid, pelvic organs below pelvic pain line

parasympahtetics

28

visceral interoceptive afferents- GI to left colic flexure

vagus

29

visceral interoceptive afferents- kidneys and ureters

vagus

30

visceral interoceptive afferents- pelvic organs, GI past colic flexure

pelvic splanchnic