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Anatomy > Cranial Nerves > Flashcards

Cranial Nerves Flashcards

1
Q

I name
sensory or motor
foramen

A

olfactory n.
sensory - olfaction/smell in the olfactory epithelium innervated by ethmoturbinates
cribriform plate of the ethmoid bone

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2
Q

II name
sensory or motor
foramen

A

optic n.
sensory - vision only
optic canal

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3
Q

III name
sensory or motor
foramen

A

oculomotor n.
motor to external eye muscles (ventral/medial/dorsal rectus mm, ventral oblique m., & levator palpebrae superioris m.)
orbital fissure

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4
Q

IV name
sensory or motor
foramen

A

trochlear n.
motor to dorsal oblique m.
orbital fissure

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5
Q

V name
sensory or motor
foramen

A

trigeminal n.
sensory - somatosensation of the head (pain, temp, touch, proprioception)
motor - muscles of mastication (temporalis m., masseter m., digastricus m.)

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6
Q

VI name
sensory or motor
foramen

A

abducens n.
motor - lateral rectus m. & retractor bulbi m.
oribital fissure

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7
Q

VII name
sensory or motor
foramen

A

Facial n.
motor - facial expressions (e.g. orbicularis oculi m.), & autonomic to lacrimal gland & salivary gland
sensory - taste to rostral 2/3 tongue
internal acoustic meatus & stylomastoid foramen

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8
Q

VIII name
sensory or motor
foramen

A

vestibularcochlear n.
sensory - ear equilibrium/vestibular sense (vestibular n.) and auditory (cochlear n.)
internal acoustic meatus

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9
Q

IX name
sensory or motor
foramen

A

glossopharyngeal n.
motor - pharyngeal mm. & some salivary glands (autonomic)
sensory - taste & somatosensation caudal 1/3 of tongue
jugular foramen & tympano occipital fissure

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10
Q

X name
sensory or motor
foramen

A

vagus n.
sensory - visceral sensation and taste
somatic motor - esophagus & larynx
visceral motor - autonomic/ parasympathetic to all viscera of thorax & most of abdomen
jugular foramen & tympano occipital fissure

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11
Q

XI name
sensory or motor
foramen

A

accessory n.
somatic motor - neck mm. (trapezius m., cleidocephalicus m. (pars mastoideus) and sternocephalicus m.)
jugular foramen & tympano occipital fissure

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12
Q

XII name
sensory or motor
foramen

A

hypoglossal n.
motor - intrinsic & extrinsic muscles of the tongue
hypoglossal canal

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13
Q

mm. of mastication (except for one muscle) are specifically innervated by what nerve branch from what cranial nerve

A

mandibular nerve division of the trigeminal nerve (cranial nerve number V)

except m.digastricus where the rostral belly is innervated by trigeminal n. but caudal belly innervated by facial n.

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14
Q

what are the three branches of the trigeminal n. and in what areas are their sensation zones

name their opening to the outside of the skull

A
  1. ophthalmic n.
    - sensory to the medial canthus, cornea, upper eyelid & nasal vestibule
    - orbital fissure
  2. maxillary n.
    - sensory to the upper half of muzzle
    - rostral alar formamen
  3. mandibular n.
    - sensory to the mandible
    - motor to mm. of mastication
    - oval foramen
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15
Q

what are the branches of the mandibular division and their sensory or motor innervations

A
  1. lingual n.
    - sensory to the tongue
  2. inferior alveolar n.
    - sensory to lower teeth
    2A. mental nn.
    - sensory to chin/lower lip
  3. mylohyoid n.
    - sensory and motor to mylohyoideus m.
  4. buccal n.
    - sensory to inside of cheek
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16
Q

what are the autonomic/parasympathetic nerves

A

III, VII, IX, X

17
Q

what cranial nerves have functions with the periorbita

A

II, III, IV, V (ophthalmic division), VI

18
Q

branches of the ophthalmic division of trigeminal nerve

A

cornual n. in goats
- sensory to horns

supraorbital n. in large animals
- sensory to upper eyelid; supraorbital foramen

19
Q

branches of the maxillary division of trigeminal nerve

A

infraorbital n.
- sensory to rostra upper arcade/lip and soft tissues
- infraorbital foramen

cornual n. in bovids/sheep/goats
- sensory to horns

20
Q

branches of facial n.

A

auriculopalpebral n. (rostral auricular n. + palpebral n.)
dorsal and ventral buccal nn.

21
Q

CANINE
for a mental block…
what nerve? foramen? area?

A

mental nn.
inject mental foramen
chin +/- lower incisors/canines
[+ teeth if injected into foramen]
[- teeth if injected outside foramen]

22
Q

CANINE
for a inferior alveolar block…
what nerve? foramen? area?

A

inferior alveolar n.
inject the mandibular foramen
lower arcade and associated soft tissues/tongue (due to lingual n. running adjacent)

23
Q

CANINE
for a maxillary block…
what nerve? foramen? area?

A

maxillary n.
inject maxillary foramen
upper arcade & associated soft tissues (except nasal vestibule)

24
Q

CANINE
for a infraorbital block…
what nerve? foramen? area?

A

infraorbital n.
inject infraorbital foramen
rostral part of upper arcade & associated soft tissues (except nasal vestibule)

25
Q

HORSE
for a infraorbital block…
what nerve? foramen? area?

A

infraorbital n.
infraorbital foramen
soft tissue procedures on nose & upper lip

26
Q

HORSE
for a mental block…
what nerve? foramen? area?

A

mental n.
mental foramen
soft tissue procedures on lower lip

27
Q

COW/SHEEP/GOATS
for a cornual block…
what nerve? foramen? area?

A

cornual n. (cow/sheep have 1 and goats have 2)
inject halfway between orbit and base of horn on temporal line
dehorning/horn surgery

28
Q

HORSE/COW
for a supraorbital block…
what nerve? foramen? area?

A

supraorbital n.
supraorbital foramen
upper eyelid, usually for ophthalmic procedures

29
Q

COWS
for a Peterson block…
what nerve? foramen? area?

A

ophthalmic n., maxillary n, and Cr.n. III, IV, VI
foramen orbitorotundum
anesthesia/paralysis of all orbital contents; enculeation

30
Q

HORSE
for an auriculopalpebral block…
what nerve? foramen? area?

A

auriculopalpebral n.
high point of zygomatic arch
not sensory block - motor innervation to orbicularis oculi
blocks for ophthalmic exam/procedures

Anatomy (16 decks)

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