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ANATOMY Section 4 Part 2 > 14b – Cranial Nerve Part II > Flashcards

14b – Cranial Nerve Part II Flashcards

1
Q

Olfactory nerve (I):

A

-special sense of SMELL
-multiple tracts
-nerves covered by MENINGES
-pass thru olfactory foramina in cribriform plate of ethmoid
-transmit sense of smell
-also include VOMERONASAL nerves

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2
Q

Optic nerve (II):

A

-special sense of VISION
-very LARGE
-flexuous course thru orbit to reach eye
-INTERNAL ophthalmic artery travels with it

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3
Q

‘orbital fissure’ in ruminants and pigs:

A

-orbitorotundum

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4
Q

Oculomotor nerve (III):

A

-through orbital fissure (dogs and horses)
>orbitorotundum (ruminants and pigs)
-ventral root equivalent

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5
Q

Oculomotor nerve (III) is motor to:

A

-dorsal, ventral and medial RECTI
-ventral oblique
-LEVATOR of upper eyelid
-parts of retractor bulbi

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6
Q

Oculomotor nerve (III) is ANS to:

A

-ciliary body to regulate LENS
-iris to constrict pupil

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7
Q

Trochlear nerve (IV):

A

-through orbital fissure (dogs and horses)
>orbitorotundum (ruminants and pigs)
-ventral root equivalent

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8
Q

Trochlear nerve (IV) is motor to:

A

-DORSAL oblique
-SMALLEST CN

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9
Q

Trigeminal nerve (V):

A

-dorsal root equivalent
-LARGEST CN
-3 main divisions

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10
Q

3 main divisions of trigeminal nerve (V):

A

-opthalmic (V1)
-maxillary (V2)
-mandibular (V3)

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11
Q

Where do the 3 divisions of trigeminal nerve (V) pass thru?

A

-orbital fissure (V1)
-ROUND foramen (V2)
-oval foramen (V3)

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12
Q

Function of trigeminal nerve (V):

A

-V1 and V2: sensory
-V3: mixed
*main sensory of head
-including rostral 2/3rd of tongue
-sinuses
-motor to MASTICATORY muscles

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13
Q

Trigeminal nerve is motor to masticatory muscles:

A

-masseter
-temporalis
-pterygoids
-rostral belly of digastricus

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14
Q

Ophthalmic nerve (V1):

A

-SENSORY to skin of FOREHEAD and most of NASAL cavity

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15
Q

What nerves branch off of ophthalmic nerve?

A

-lacrimal nerve
-frontal nerve
-nasociliary nerve

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16
Q

Lacrimal nerve to:

A

-lacrimal glands
-other deeper orbital structures
-skin lateral to eye

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17
Q

Frontal nerve to:

A

-skin of upper eyelid and forehead
-MUCOSA of frontal sinus
-provides alterative innervation of horns

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18
Q

Nasociliary nerve branches:

A

-long ciliary nerve
-infratrochlear nerve
-ethmoidal nerve

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19
Q

Nasociliary nerve in small ruminants:

A

-forms main nerve of horn
>alternative innervation of horns in cattle

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20
Q

Long ciliary nerve to:

A

-cornea

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21
Q

Infratrochlear nerve to:

A

-medial angle of eye
-part of frontal sinus

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22
Q

Ethmoidal nerve:

A

-re-enters cranial cavity (via ethmoidal foramen)
-goes into nasal cavity (via cribriform plate
>to medial and lateral walls of nasal cavity

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23
Q

Maxillary nerve (V2):

A

-SENSORY to:
>skin of MUZZLE
>mucosa of ORAL cavity
>parts of nasal cavity
>upper teeth

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24
Q

Branches off of maxillary nerve:

A

-zygomatic nerve
-palatine nerve
-caudal nasal nerve
-cranial nasal nerve
-maxillary alveolar nerve
-infraorbital nerve

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25
Q

Zygomatic nerve to:

A

-lower eyelid and adjacent skin
-gives rise to other branches
>cornual nerve=main nerve for horn in cattle

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26
Q

Palatine nerve to:

A

-lesser palatine nerve: soft palate
-greater palatine nerve: hard palate and floor of nasal cavity

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27
Q

Caudal nasal nerve (via pterygopalatine foramen) to:

A

-ventral nasal cavity
-maxillary sinus

28
Q

Cranial nasal nerve to:

A

-ventral part of nasal cavity

29
Q

Maxillary alveolar nerve to:

A

-all teeth of UPPER jaw

30
Q

Infraorbital nerve route and goes to:

A

-into maxillary foramen
-out of infraorbital foramen
-to: muzzle

31
Q

Mandibular nerve (V3):

A

-sensory to parts of face
-motor to muscles of MASTICATION

32
Q

Sensory branches of mandibular nerve (V3):

A

-buccinator (aka buccal nerve)
-mandibular alveolar nerve
-mental nerve
-lingual nerve
-auriculotemporal nerve

33
Q

Buccinator nerve:

A

-aka buccal nerve
>don’t confuse with dorsal/ventral buccal branches of VII)
-to: buccal mucosa and facial skin

34
Q

Mandibular alveolar nerve to:

A

-lower teeth

35
Q

Mental nerve is:

A

-terminal part of mandibular alveolar nerve exiting mental foramen

36
Q

Mental nerve to:

A

-chin
-lower face skin

37
Q

Lingual nerve relays:

A

-general sensation (NOT TASTE) of rostral 2/3rd of tongue
>chorda tympani nerve of VII transmits taste from this region

38
Q

Auriculotemporal nerve to:

A

-ear
-temporal region
-areas extending to corner of mouth

39
Q

Motor mandibular nerve to:

A

-masseter
-temporal
-pterygoid muscles
-cranial belly of digastricus (caudally belly by VII)
-other branches to mylohyoideus

40
Q

Damaged trigeminal nerve (V) in dog:

A

-atrophy of muscles of mastication
-dropped jaw (ex. Horner syndrome)

41
Q

Cutaneous sensory nerves of head in horse:

A

-VII
-X
-CS nerves
-cervical spinal nerves
-mandibular (V3)
-maxillary (V2)
-opthalmic (V1)

42
Q

Abducent nerve (VI):

A

-goes through orbital fissure
-ventral root equivalent

43
Q

Abducent nerve (VI) motor to:

A

-LATERAL rectus
-retractor bulbi

44
Q

Facial nerve (VII):

A

-through stylomastoid foramen
-dorsal root equivalent

45
Q

Facial nerve (VII) motor to:

A

-muscles of FACIAL expression

46
Q

Facial nerve (VII) sensory from:

A

-skin inside EAR

47
Q

Facial nerve (VII) TASTE from:

A

-palate
-rostral 2/3rd of tongue

48
Q

Facial nerve (VII) ANS to:

A

-lacrimal glands
-sublingual and mandibular salivary glands

49
Q

Facial nerve (VII): facial paralysis in horse

A

-buccal branches of facial nerve can be seen on fine-skinned horses
>need to be careful if they are lying on their side

50
Q

Vestibulocochlear nerve (VIII):

A

-special senses of hearing and BALANCE
-entirely WITHIN bones of skull

51
Q

Cranial nerves IX, X, XI pass thru:

A

-JUGULAR foramen
>visible external opening in DOG is tympano-occipital fissure

52
Q

Jugular foramen in HORSE and pig:

A

-continuous with foramen lacerum

53
Q

Glossopharyngeal nerve (IX):

A

-dorsal root equivalent

54
Q

Glossopharyngeal nerve (IX) sensory from:

A

-primary nerve for SENSATION from pharynx
-caudal 1/3rd of tongue

55
Q

Glossopharyngeal nerve (IX) TASTE from:

A

-caudal 1/3rd of tongue

56
Q

Glossopharyngeal nerve (IX) motor to:

A

-stylopharyngeus

57
Q

Glossopharyngeal nerve (IX) ANS to:

A

-parotid and buccal salivary glands
-carotid sinus and body

58
Q

Vagus nerve (X):

A

-dorsal root equivalent

59
Q

Vagus nerve (X) sensory from:

A

-pharynx
-LARYNX
-parts of external ear
-most viscera

60
Q

Vagus nerve (X) motor to:

A

-PHARYNGEAL muscles
-laryngeal muscles

61
Q

Vagus nerve (X) ANS to:

A

-most VISCERA

62
Q

Accessory nerve (XI):

A

-dorsal root equivalent

63
Q

Accessory nerve (XI) motor to:

A

-brachiocephalicus
-omotransversarius
-trapezius
-sternocephalicus

64
Q

Hypoglossal nerve (XII):

A

-thru hypoglossal canal via hypoglossal foramen
-VENTRAL root equivalent

65
Q

Hypoglossal nerve (XII) motor to:

A

-INTRINSIC and extrinsic muscles of tongue

66
Q

ANS in head: nerve to lens and iris

A

-III
>parasympathetic

ANATOMY Section 4 Part 2 (11 decks)

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