LEC56: Autonomics of the Head & Neck Flashcards Preview

Structures: Part Deux > LEC56: Autonomics of the Head & Neck > Flashcards

Flashcards in LEC56: Autonomics of the Head & Neck Deck (64):
1

ANS innervates?

fibers innervating smooth m, cardiac m, glands 

 

2

major divisions of the ANS?

1) parasympathetics: initial cell bodies in cranio-sacral portion of spine 

2) sympathetics: initial cell body in thoraco-lumbar portion of spine

3

where does sympathetic system begin? how does it synapse?

 initial cell body: T1-L2 

2nd cell body: outside of T1-L2, likely in paravertebral chain ganglia 

4

which type of ganglia is this? 

Q image thumb

sympathetic ganglia

5

what can postsynaptic nerve fibers do in sympathetic system?

first symapse at presynaptic entrance level then can 

1) leave trunk at that level in gray ramus to reach spinal nerve or organ

2) synapse at a higher level and go to head, viscera

6

what spinal cord level must these fibers be leaving at?

black park- in T1 portion

red part- cervical part of cord- note the absense of an IML in the column

7

name the sympathetic ganglia of the face/neck 

1) inferior cervical ganglia 

2) middle cervical ganglia 

3) superior cervical ganglia (big!)

8

what do postganglionics from face/neck sympathetics do?

warap around vessels in the area

9

what do postganglionics of inferior cervical ganglion wrap around?

vertebral artery and its branches

10

what do postganglionics of middle cervical ganglion wrap around?

wrap around external coratid and its branches

11

what do postganglionics of superior cervical ganglion wrap around?

wrap around internal coratid and its branches

12

what does common carotid a split into?

internal & external carotid aa

13

cause of horner's syndrome?

knock out of sympathetics on a particular sign of face

14

signs of horner's syndrome?

1) ptosis- lowering of upper lid, due to smooth muscle weakness in part innervated by sympathetics 

2) pupil- narrow b/c sympathetics which are dilators are knocked out, parasympathetics which are constrictors are in tact

3) loss of sweating on that side of face 

4) retration of eyeball on that side of face

15

cranial nerves of parasympathetic system?

III, VII, IX > cranial ganglia > head- eye, glands, smooth m

X > synapse in or near walls of viscera > pharynx to midgut 

 

16

pelvic splanchnics are?

S2, 3, 4

> hindgut, pelvis

17

name the 4 parasympathetic ganglia in head/neck

1) ciliary

2) pterygopalatine (sphenopalatine)

3) submandibular

4) otic

18

locations of the 4 parasympathetic ganglia in head/neck

1) ciliary- in orbit

2) pterygopalatine- pterygoalatine fossa

3) submandibular- oral cavity 

4) otic- foramen ovale

19

4 roots of a parasympathetic ganglion

1) preganglionic parasympathetic (motor) root 

2) sensory root

3) sympathetic root 

4) distribution root

20

function of preganglionic parasympathetic motor root?

main function entity of parasympathetic of head/neck

tells how fibers get to 2nd cell bodies

21

function of sensory root of parasympathetic ganglion?

somatic afferent fibers 

from CN V, trigeminal n

22

function of sympathetic root of parasympathetic ganglion?

postganglionic sympathetics that traverse ganglion

23

function of distribution root of parasympathetic ganglion?

branch of trigeminal n

the 3 other roots - sensory, sympathetic, motor - travel w/ this to target organ

24

fiber types of trigeminal n CN V

SVE 

GSA 

25

how can something be transmitted to a branch of CN V, trigeminal n, without being a part of CN V, trigeminal n?

CN V is used to convey postganglionic autonomic fibers, besides having its own innervating SVE/GSA fibers 

so motor root, sensory root, sympathetic roots of parasympathetic ganglion all travel along branch of CN V; it serves as the distribution root

26

where is ciliary ganglion located? 

what is it suspended from?

located in orbit, later to optic nerve

suspended from nasociliary nerve (branch of V1

27

target of ciliary ganglion

eye - pupil

28

target of pterygopalatine ganglion

lacrimal gland

29

target of submanidbular ganglion

submandibular gland

30

target of otic ganglion

parotid gland

31

ciliary ganglion: motor root

(preganglionic parasympathetic fibers carried in)

oculomotor nerve (CN III) 

 

32

ciliary ganglion: sensory root

nasociliary n (V1)

33

ciliary ganglion: sympathetic root

carotid plexus from superior cervical ganglion,

via plexus around opthalmic artery, br of internal carotid a

34

ciliary ganglion: distribution root

nasociliary nerve branches (V1): 

1) postgang. PARASYMPAHETICS via short ciliary nn to phincter pupillae & ciliaris mm 

2) postgang. SYMPATHETICS & sensory fibers via short & long ciliary nn to iris (dilatory pupillae), ciliary body, cornea

 

35

pterygopalatine ganglion: motor root

preganglionic parasympathetic fibers in greater petrosal n (br CN VII) joins w/ deep petrosal n to form n of pterygoid canal

36

pterygopalatine ganglion: sensory root

main trunk V2

37

pterygopalatine ganglion: sympathetic root

deep petrosal n from superior cervical ganglion, via internal carotid a, through vidians canal

38

pterygopalatine ganglion: distribution root

branchs of V2 direct or comm to lacrimal gland/secretomotor to palate, nasal cavity, pharynx

39

submandibular ganglion: motor root

preganglionic parasympathetic fibers carried in chorda tympani n (br CN VII) to lingual nerve (V3)

40

submandibular ganglion: sensory root

lingual n (V3)

41

submandibular ganglion: sympathetic root

from sympathetic plexus of cervical ganglion, via facial a, branch of external carotid a

42

submandibular ganglion: distribution root

terminal branches of lingual n (V3) to sublingual & submandibular glands

43

otic ganglion: motor root

pregnglionic paraysmpathetic fibers carred in 

lesser petrosal nerve (br. CN IX) 

44

otic ganglion: sensory root

mandibular n (V3)

45

otic ganglion: sympathetic root

from plexus on middle cervical ganglion, via middle meningeal artery, br of external carotid a

46

otic ganglion: distribution root

via communicating branches to auriculotemporal n (V3) to parotid gland

47

clinical manifestation of CNIII damage?

marked ptosis (drooping) of eyelid (b/c of paralysis of levator palpebrae superioris)

hugely dialated pupil (b/c parasympathetic constrictors knocked out, sympathetic dialators fxning - opposite of horner's pupil)

 

48

location of pterygopalatine ganglion

in pterygopalatine fossa 

ganglion suspended from main trunk of maxillary n (V2)

49

identify where the pterygopalatine ganglion sits 

Q image thumb

A image thumb
50

where does pterygopalatine ganglion distribution root go?

lacrimal gland - responsible for lacrimation

 

 

51

what is greater petrosal n a branch of

CN VII 

52

what nerve is specifically responsible for lacrimation

greater petrosal n 

brings secretomotor fibers to pterygopalatine gang to lacrimal gland

53

what bone does CN VII come in to

petrous, part of the temporal bone

"rock hard"

54

what runs along top of petrous bone?

facial hiatus

55

what type of nerve fibers does greater petrosal n carry? what is it responsible for?

carries both preganglionic parasympathetic fibers & TASTE fibers 

responsible for tate all over palate

56

what is chorda tympany n a branch of?

CN VII 

57

what is fxn of chorda tympani n?

carries preganglionic parasympathetics going to submandibular ganglion

carries taste from anterior 2/3 of tongue

does secretomotor functions of oral cavity 

58

where does chorda tympani n run?

between malleus and incus

59

what does chorda tympani n communicate between?

arch 1 & arch 2 structures

60

where is otic ganglion located re: foramen?

at opening of foramen ovale

61

where is parotid gland

A image thumb
62

what innervates parotid gland?

lesser petrosal n > otic ganglion > distributed by auriculotemporal branches > parotid gland

63

cause of gustatory sweating?

if auriculotemporal n damaged, or hwen have infection or parotid removed 

 

A image thumb
64

what happens if parotid gland is removed?

whereas normally, sympathetics > sweat glands and parasympathetics > parotid, if remove parotid, get parasympathetics > sweat glands that normally don't so when chew, get sweating on side of parotid removal, rather than parotid activity 

 

A image thumb