Cranial nerves 3 Flashcards Preview

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Flashcards in Cranial nerves 3 Deck (61)
1

what is nervus intermedius

part of the facial nerve that contains sensory and parasympathetic fibres

2

what nerve supplies sensation to the cavities of the head

trigeminal (somatic afferent)

3

what are the muscles of mastication derived from

1st pharyngeal arch (so special visceral efferent)

4

what is the function of the trigeminal motor nucleus

muscles of mastication

5

function of the trigeminal mesencephalic nucleus

proprioception

6

trigeminal principle sensory nucleus

discriminative touch

7

trigeminal spinal nucleus

pain and temp for structures supplied by cn5 plus general sensation for viscera supplied by 9 and 10

8

where do the nerve roots of cn5 emerge

from the mid pons

pass forward onto the apex of the petrous temporal bone where the trigeminal ganglion lies in a cave of dura mater (meckel's cave)

9

what is the other name for the trigeminal cave

Meckel's cave

10

describe the pathway of the opthalmic and maxillary divisions

divisions pass anteriorly in the lateral wall of the cavernous sinus to reach the superior orbital fissure then the orbit, and foramen rotundum then the pterygo-palatine fossa respectively

11

where does the opthalmic division exit the skull

superior orbital fissure

12

where does the maxillary division exit the skull

foramen rotundum and pterygo palatine fossa

13

where does the mandibular division exit the skull

foramen ovale and into the infratemporal fossa

14

what muscles does the facial nerve supply (special visceral efferent)

facial expression

stapedius
stylohyoid
posterior belly of digastric (from second pharyngeal arch)

15

what is the general visceral efferent supply of the facial nerve (psymp)

superior salivatory nucleus in the pons

lacrimal gland
nasal cavity
sinuses
palate
submandibular and sublingual glands

16

what is the special visceral afferent function of the facial nerve

taste from anterior 2/3rds of tongue (nucleus solitarius)

17

superior salivatory nucleus (cn7)

psymp secretomotor to lacrimal gland, nasal and oral cavities, submand and subling glands

18

where does the motor root of 7 and nervus intermedius emerge

cerebellopontine angle

19

where does the motor root of 7 go after emerging at the cerebellopontine angle

enters the petrous temporal bone at the internal acoustic meatus with cn 8 and the labyrinthine artery

20

where is the facial nerve at risk of compression

at the internal acoustic meatus- compression will affect muscles of facial expression and stapedius

21

where does the chorda tympani arise from cn 7

just before the stylomastoid foramen

22

what is the chorda tympani

a branch of the facial nerve that originates from the taste buds in the front of the tongue, runs through the middle ear, and carries taste to the brain

it joins the facial nerve inside the facial canal at the level where the facial nerve exits the skull

23

what 3 nerves are involved in taste

glossopharyngeal
facial (chorda tympani)
vagus

24

what is the geniculate ganglion

neurons of the facial nerve located in the facial canal of the head

motor, sensory and psymp

innervates lacrimal gland, submandibular, sublingual, tongue, palate, pharynx, external auditory meatus, stapedius, stylohyoid, digastric, muscles of facial expression

25

where are the cell bodies for taste

geniculate ganglion

26

where is the greater petrosal nerve

escapes from the middle ear and lies of the surface of the petrous bone in the middle cranial fossa

passes through the foramen lacerum and heads towards the pterygoid canal

27

foramen rotundum

maxillary nerve

28

what does the greater petrosal nerve carry

visceral efferent (psymp) and taste (special visceral afferent) from the nervus intermedius 7

29

what is the deep petrosal nerve derived from

the sympathetic plexus on the internal carotid (in the carotid canal)

30

what do the greater petrosal and deep petrosal nerve combine to form

nerve of the pterygoid canal

31

what does the nerve of the pterygoid canal pass through

the pterygoid canal to end up in the pterygopalatine fossa

32

where are the pterygopalatine fossae

between the pterygoid process and the maxillary tuberosity, close to the apex of the orbit

33

what is the nerve supply of mylohyoid and ant belly of digastric

inferior alveolar (dental nerve) from V3

then enters the mandibular foramen to supply the teeth
then emerges as the mental nerve to chin and lower lip

34

describe the course of the chorda tympani

passes through the middle ear medial to the typanic membrane (between incus and malleus)

leaves the skull to join the lingual branch of the mandibular nerve

taste and psymp supply to glands

35

where does the lingual nerve enter the oral cavity

between mylohyoid and hyoglossus

36

what does the lingual nerve carry

is combined with the chorda tympani so carries taste and sensation from ant tongue and also psymp to the submandibular glands and sublingual

37

what structure does v3 pass through

foramen ovale

38

where does the chorda tympani emerge

petrotympanic fissure to join the lingual nerve in the infra temporal fossa

39

where does the chorda tympani arise from cn7

just before the stylomastoid foramen

40

what is the nerve supply of the maxillary sinus

infra orbital nerve with superior alveolar nerves

41

what is the nerve supply of the spenoidal sinuses

V1 and V2

42

what is the nerve supply of the frontal sinus

supraorbital nerve

43

what is the nerve supply of the ethmoidal sinus

ant and post ethmoidal nerves

44

what is the supply to the hard palate

greater palatine branch of V2 and artery

plus nasopalatine

45

what is the supply to the soft palate

lesser palatine branch of V2 and artery

plus nasopalatine

46

where does the glossopharyngeal nerve refer pain to (supplies tonsils)

middle ear

47

what is the nerve supply to the septum of the nose

V1 and 2

48

what structure does the nasopalatine nerve pass through to supply the anterior palate

incisive canal

49

what does the anterior ethmoidal nerve continue as

external nasal nerve that supplies the tip of the nose

50

what is the anterior ethmoidal nerve

branch of nasocilliary, V1, that supplies the cornea

51

what is the nerve supply of the lateral wall of the nasal cavity

V1 and V2
plus psymp from cn 7 nervus intermedius

52

what structure does the olfactory nerve and anterior ethmoidal nerve pass through

cribriform plate

53

what is the function of the sphenopalatine foramen

passage of branches of the maxillary nerve

54

what does the supra orbital nerve supply

the frontal sinus

55

what does the ethmoidal nerve supply

lateral wall of nasal cavity and the nasal septum

56

what is the function of the lacrimal nerve (v1)

carries psymps fibres from the pterygopalatine ganglion to the lacrimal gland

57

what is the supply to the lacrimal gland

V2 and V1

(zygomatic branches via inf fissure)

58

what nerves synapse in the pterygopalatine ganglion in the pterygopalatine fossa

preganglionic fibres from nervus intermedius

59

what bone is the pterygoid plates a part of

spenoid

60

what passes through the foramen rotundum

maxillary nerve

61

what does the greater petrosal nerve carry

taste and psymp from nervus intermedius