Cranial nerves 4 Flashcards Preview

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Flashcards in Cranial nerves 4 Deck (69)
1

what are the functions of glossopharyngeal (9)

stylopharyngeus muscle (special visceral efferent)

parotid gland parasympathetic supply (general visceral efferent)

carotid sinus and carotid body (general visceral afferent)

1o....general sensory from pharynx and posterior tongue (general somatic afferent)

taste from posterior third of the tongue (special visceral afferent)

2

What is the function of the vagus nerve

parasympathetic heart lungs Gi tract

taste

carotid body and sinus

3

what is the function of hypoglossal nerve (12)

motor tongue (somatic efferent)

4

what is the trigeminal motor nucleus derived from

muscles from the first pharyngeal arch

5

what is the function of the trigeminal mesencephalic nucleus

proprioception

6

what is the function of the trigeminal prinicple sensory nucleus

discriminitave touch

7

what is the funtion of the trigeminal spinal nucleus

pain and temperature, general conscoius sensation for the viscera supplied by 9 and 10

8

what is the function of the inferior salivatory nucleus of glossopharyngeal

parasympathetic secretomotor to parotid

9

what is the function of hypoglossal nucleus

motor to tongue

10

what is the function of accessory spinal root

motor to sternocleidomastoid and trapezius

11

what is the function of the solitary nucleus 0f 9 and 10

taste and visceral sensation

12

why do lesions of 8, 10, 11 and 12 commonly happen together

they lie close together at the base of the skull

13

what does the nucleus ambiguos of 9 and 10 supply

striated muscles of the pharynx and larynx

14

what does the dorsal nucleus of vagus supply

p'symp to heart lungs and intestine

15

what does the spinal nucleus of 5 receive

general sensation from 9 and 10

16

which two nerves join together to make the special visceral efferent from the nucleus ambiguus

cranial accessory and vagus

17

which nerves arise from the medulla and pass through the jugular foramen

9 10 and 11

18

what does cranial nerve 12 pass through

anterior condylar canal

19

what does the accessory nerve pass through

foramen magnum and then jugular foramen

20

what nerves are found between the internal carotid artery and internal jugular vein

9, 10, 11, 12

21

what trigeminal nerve division recieves a contribution from 9

auriculotemporal nerve

22

which trigeminal nerve joins with the chorda tympani

lingual nerve

23

where does pain from the tonsil and oropharynx refer to

middle ear

24

describe the course of the lesser petrosal nerve

leaves the middle ear and lies on the surface of the petrous temporal bone in the middle cranial fossa, before emerging thro the foramen ovale
synapses in the otic ganglion

25

what passes through the jugular foramen

internal jugular vein, nerves 9, 10 and 11

26

what passes through the carotid canal

internal carotid artery

27

what do the ganglionic swellings on 9 and 10 house

cell bodies of primary sensory neurones

28

what nerve defects affect swallowing and the gag reflex

9 and 10

29

what does 10 and 11 supply

general sensation from auricle and external accoustic meatus, plus the laryngopharynx and larynx

taste from vallecula and epiglotis

visceral sensory afferents from blood vessels for control of CVS, plus afferents from heart lungs and gi

motor supply to muscle of pharynx and larynx

30

where is the pharyngeal plexus

external pharyngeal wall over middle constrictor

31

what is the nerve supply to the pharynx

pharyngeal plexus
recieves branches 9 and 10 plus cervical sympathetics

32

what is the sensory nerve supply to the Oropharynx, palatine tonsil, inferior aspect of soft palate and posterior 1/3 tongue

Glossopharyngeal (IX) Referred pain to middle ear

33

what is the sensory nerve supply of laryngopharynx, vallcula and epiglottis

vagus

34

what is the sensory nerve supply of the soft palate

combination of V2 and 9

35

what is the sensory nerve supply of the nasopharynx

maxillary V2

36

what is the motor nerve supply of the pharynx

vagus except stylopharyngeus which is glossopharyngeal

37

what is the parasympathetic secretomotor supply of the pharynx

vagus plus the pterygopalatine ganglion via V2

38

what is the afferent supply of the gag reflex

9

39

what is the efferent supply of the gag reflex

10

40

where does the hypoglossal nerve arise from

hypoglossal/ anterior condylar canal

41

describe the course of the hypoglossal nerve

descends the neck, passes lateral to both the internal and external carotid arteries and associated with a loop of cranial nerves that supply the strap muscles of the neck

42

how is the tongue affected in a hypoglossal nerve lesion

ipsilateral tongue weakness so it deviates to the side of the lesion

43

describe the course of hypoglossal when it enters the oral cavity

enters under the tongue between mylohyoid and hyoglossus to supply all tongue muscles except palatoglossus

44

what is the nerve supply of palatoglossus

10 via pharyngeal plexus

45

what are the functions of glossopharyngeal

sensory to middle ear
psymp to parotid
motor to stylopharyngeus
special visceral sensory to tonsils, pharynx and tongue
taste to post tongue
baro/chemo receptors

46

what are the limbs of the sneeze and cough reflexes

v2 afferent
9 and 10 efferent

involves trigeminal sensory nucleus and nucleus ambiguus

47

inferior salivatory nucleus

glossopharyngeal nerve to parotid gland

48

superior salivatory nucleus

facial nerve to sub glands

49

what happens in complete paralysis of the recurrent laryngeal nerve

the vocal fold lies semi abducted- vibrates so respiration is noisy

50

what happens in partial paralysis of the recurrent laryngeal

the vocal fold moves into the midline- if bilateral then life threatening

51

what is the effect of paralysis of the external laryngeal nerve

may be hoarseness of the voice

52

where is the right recurrent laryngeal nerve

inferior to the subclavian artery

53

where is the left recurrent laryngeal nerve

inferior to the aorta and ligamentum arteriosum
ascends between the trachea and oesophaus

54

what does the recurrent laryngeal nerve supply

all muscles of the larynx except cricothyroid and sensation to the vocal cords and larynx

55

what is the function of the superior laryngeal nerve

sensation of the larynx down tot he vocal folds (internal branch)

56

what is the nerve supply to the cricothyroid

external branch of superior laryngeal nerve

57

what nerves are at risk during thyroid surgery

laryngeal

58

where is the pteryogmandibular raphe

superior contrictor and buccinator

59

what is the sensation supply to the tongue

lingual (5) and glossopharyngeal

60

what is the motor supply to tongue muscles

hypoglossal except palatoglossus which is vagus via pharyngeal plexus

61

what is the nerve supply to the muscles of the pharynx

vagus except stylopharyngeus

62

what nerves does the pharyngeal plexus (external pharyngeal wall) contain

9, 10 and cervical sympathetics

63

what is the sensory nerve supply to the vallecula and epiglottis

vagus

64

what is the sensory supply to the oropharynx, palatine tonsil, soft palate and post tongue

9

referred pain to middle ear

65

what muscle does the pharyngeal plexus overlie

middle constrictor

66

what nuclei are involved in the gag reflex

solitarius
ambiguus

67

what pharyngeal arches are the muscles of the pharynx and larynx derived from

4 and 6

68

what passes through the jugular foramen

internal jugular vein
nerves 9, 10 and 11

69

describe the course of the spinal accesory nerve

passes up through the foramen magnum and then back out via the jugular foramen