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3. HLTH 213 > Head and neck: cranial nerves II > Flashcards

Head and neck: cranial nerves II Flashcards

1
Q

CN VII facial nerve: enters/ exits CNS

A

btw pons and medulla

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2
Q

CN VII facial nerve: enters/ exits skull

A
  • internal acoustic meatus -> facial canal -> stylomastoid foramen
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3
Q

CN VII facial nerve: site of cell bodies

A
  • SVE (BE): pons
  • SA: geniculate ganglion
  • GVE: presynaptic fibres (pons), postsynaptic (pterygopalatine and submandibular ganglia)
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4
Q

CN VII facial nerve: list 2 main roots

A
  • intermediate nerve (sensory, nervus intermedius)

- motor root

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5
Q

CN VII facial nerve: intermediate nn fibres

A
  • GSA: sensory from ext acoustic meatus
  • SA: taste ant 2/3 tongue
  • GVE: parasymp secretomotor (lacrimal gland, sublingual salivary, mucous membranes of nasal cavity glands, hard and soft palate)
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6
Q

CN VII facial nerve: what branch supplies taste ant 2/3 of tongue

A
  • chorda tympani (petrotrympanic fissure)
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7
Q

CN VII facial nerve: motor root fibres

A
  • SVE: mm facial expression and scalp, stapedius, post belly of digastric, stylohyoid mm
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8
Q

CN VII facial nerve: within facial canal gives what nn

A
  • greater petrosal
  • n to stapedius
  • chorda tympani
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9
Q

CN VII facial nerve: after exiting stylomastoid foramen, it gives-

A
  • temporofacial
  • cervicofacial
  • digastric branch
  • post auricular
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10
Q

CN VII facial nerve: once entering parotid gland name branches

A
  • temporofacial, cervicofacial both:
  • temporal
  • zygomatic
  • buccal
  • marginal mandibular
  • cervical
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11
Q

CN VIII vestibulocochlear nerve: enters/ exits CNS

A

btw pons and medulla

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12
Q

CN VIII vestibulocochlear nerve: enters/ exits skull

A
  • internal acoustic meatus
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13
Q

CN VIII vestibulocochlear nerve: site of cell bodies

A
  • vestibular ganglion (vestibular n)

- spiral ganglion (cochlear n)

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14
Q

CN VIII vestibulocochlear nerve: function SSA

A
  • vestibular n: equilibrium

- cochlear: hearing

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15
Q

eg. vestibular neuritis, labryinthitis, acoustic neuroma

A
  • vestibular neuritis: inflammation of vestibular n -> compression of structures
  • labyrinthitis: similar
  • acoustic neuroma: tumour growth, also compression
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16
Q

CN IX glossopharyngeal nerve: enters/ exits CNS

A

medulla

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17
Q

CN IX glossopharyngeal nerve: enters/ exits skull

A
  • jugular foramen
18
Q

CN IX glossopharyngeal nerve: site of cell bodies

A
  • SVE: medulla
  • GVE: presynaptic (medulla), postynaptic (otic ganglion)
  • GSA: inf ganglion
  • GVA: sup ganglion
  • SVA: inf ganglion
19
Q

CN IX glossopharyngeal nerve: function- SVA

A
  • sense of taste post 1/3 tongue
20
Q

CN IX glossopharyngeal nerve: function- GSA

A

sensory from mucosa of:

  • palatine tonsil and oropharynx
  • post 1/3 of tongue
  • auditory tube (pharyngotympanic), middle ear
21
Q

CN IX glossopharyngeal nerve: function- GVA

A
  • sensory from carotid body and sinus
22
Q

CN IX glossopharyngeal nerve: function- GVE

A
  • parasympathetic

- stimulate secretion of parotid salivary gland

23
Q

CN IX glossopharyngeal nerve: function- SVE (BE)

A
  • stylopharyngeus (mm from 3rd pharyngeal arch)
24
Q

CN X vagus nerve: enters/ exits CNS

A

medulla

25
Q

CN X vagus nerve: enters/ exits skull

A
  • jugular foramen
26
Q

CN X vagus nerve: sites of cell bodies

A
  • SVE: medulla
  • GVE: presynaptic (medulla), postsynaptic fibres (neurons close to/ within viscera innervated)
  • GSA: sup ganglion
  • GVA: sup ganglion
  • SVA: inf ganglion
27
Q

CN X vagus nerve: function- SVE

A
  • constrictor mm of pharynx (except stylopharyngeus)
  • intrinsic mm of larynx
  • mm of palate (except tensor veli palatini)
  • skeletal mm (striated) in upper 2/3 esophagus
28
Q

CN X vagus nerve: function- GVE

A
  • cardiac mm

- smooth mm of airways, digestive tract

29
Q

CN X vagus nerve: function- GSA

A
  • sensory from auricle, ext auditory meatus, dura mater in post cranial fossa
30
Q

CN X vagus nerve: function- GVA

A
  • sensation from base of tongue, pharynx, larynx, airways, heart, oesophagus, stomach, intestine (to L colic flexure)
31
Q

CN X vagus nerve: function- SVA

A
  • taste from epiglottis and palate
32
Q

don’t confuse phrenic w vagus nn:

A
  • vagus: more medial, w common carotid aa (L loops around arch of aorta)
  • phrenic: btw ant/ middle scalenes
33
Q

CN XI accessory nerve: enters/ exits CNS

A
  • cranial root: medulla

- spinal root: upper spinal cord

34
Q

CN XI accessory nerve: enters/ exits skull

A
  • jugular foramen (cranial and spinal roots)

- cranial root leaves spinal to join vagus

35
Q

CN XI accessory nerve: site of cell bodies

A
  • cranial: medulla

- spinal: spinal cord

36
Q

CN XI accessory nerve: function

A
  • cranial root: mm to pharynx, larynx

- spinal root: motor to trapezius, sternomastoid mm

37
Q

CN XI accessory nerve: runs in neck

A
  • btw int carotid aa and int jugular v, obliquely to trapezius
38
Q

CN XII hypoglossal nerve: enters/ exits CNS

A
  • medulla
39
Q

CN XII hypoglossal nerve: enters/ exits skull

A
  • hypoglossal canal
40
Q

CN XII hypoglossal nerve: site of cell bodies

A
  • medulla
41
Q

CN XII hypoglossal nerve: function

A
  • motor to intrinsic/ extrinsic mm of tongue (except palatoglossus)
42
Q

CN XII hypoglossal nerve: how does it run

A
  • after hypoglossal canal runs along mandible

3. HLTH 213 (22 decks)

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