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RUSVM Gross Anatomy II (Orange) > Cranial Nerves > Flashcards

Cranial Nerves Flashcards

1
Q

CN I

A

Olfactory

Sensory

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2
Q

CN II

A

Optic

Sensory

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3
Q

CN III

A

Oculomotor

Motor

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4
Q

CN IV

A

Trochlear

Motor

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5
Q

CN V

A

Trigeminal

Both

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6
Q

CN VI

A

Abducent

Motor

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7
Q

CN VII

A

Facial

Both

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8
Q

CN VIII

A

Vestibulocochlear

Sensory

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9
Q

CN IX

A

Glossopharyngeal

Both

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10
Q

CN X

A

Vagus

Both

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11
Q

CN XI

A

Accessory

Motor

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12
Q

CN XII

A

Hypoglossal

Motor

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13
Q

What does CN I supply?

A

Sensory - smell from olfactory epithelium and pheromone detection from vomeronasal organ

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14
Q

What does CN II supply?

A

Visual impulses in response to light stimuli (vision)

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15
Q

What does CN III supply?

A 
Somatic Motor: Ventral oblique, dorsal/ventral/medial rectus, levator palpebrae superioris 
Visceral Motor (PSNS): Intrinsic Muscles of the eye: Constrictor pupillae, ciliary mm.
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16
Q

What does CN IV supply?

A

Motor: Dorsal oblique

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17
Q

What are the 3 main branches of the CN V (Trigeminal)?

A

Ophthalmic, Maxillary, Mandibular

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18
Q

What are the main branches of the Ophthalmic Nerve branch of the Trigeminal Nerve (CN V)? What does each supply?

A

NFL
Nasociliary - sensory from nasal mucosa, eyelashes, eyelids
Frontal - sensory to frontal region (scalp, forehead, horn of ruminant), medial canthus of the eye
Lacrimal - sensory to lacrimal region

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19
Q

What are the main branches of the Maxillary Nerve branch of the Trigeminal Nerve (CN V)? What does each supply?

A

ZIP
Zygomatic branch - sensory to zygomatic arch and temporalis m., lateral canthus of the eye
Infraorbital - sensory to upper lip, nose, upper teeth and gums
Pterygopalatine - sensory to palate and nose

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20
Q

What are the main branches of the Mandibular Nerve branch of the Trigeminal Nerve (CN V)? What does each supply?

A

B-LIMA
Buccal - sensory to cheek
Lingual - sensory to tongue
Inferior Alveolar - sensory to lower teeth, gum, lip
Mylohyoid - MOTOR to rostral digastricus and mylohyoideus
- sensory to intermandibular region
Auriculotemporal - sensory to external ear, temporal region, zygomatic region, masseteric region

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21
Q

What does CN VI supply?

A

Somatic motor to Lateral rectus, retractor bulbi muscles

22
Q

What does CN VII supply?

A

Sensory to skin of concave ear, ear canal, taste from rostral tongue

Somatic Motor - muscles of facial expression including auricular muscles

Visceral Motor (PSNS) - salivary and lacrimal glands

23
Q

What are the major branches of the Facial nerve (CN VII) and what do they supply?

A

Muscular branches - Motor to auricular mm., stylohyoideus m., and caudal part of digastricus m.
Dorsal/Ventral Buccal branches - Motor to mm. of facial expression
Auriculopalpebral - motor to mm. of facial expression, including rostral auricular mm.
Chorda tympani - taste for rostral 2/3 of tongue

24
Q

What does CN VIII supply?

A

Hearing and Balance

Sensory - hearing from cochlea (organ of corti), balance from semi-circular canals (maculae, cristae)

25
Q

What are the main branches of the Vestibulocochlear nerve (CN VIII)? What does each supply?

A

Vestibular Nerve - Sensory from vestibular organs (maculae and cristae)
Cochlear Nerve - Sensory from organ of corti

26
Q

What does CN IX supply?

A

Sensory - taste from caudal 1/3 of tongue, carotid sinus/body, pharyngeal muscles

Somatic Motor - stylopharyngeus m. (dilator of pharynx)

Visceral Motor (PSNS) - parotid and zygomatic salivary glands

27
Q

What does CN X supply?

A

Sensory - larynx (via caudal laryngeal branch of Recurrent laryngeal nerve and cranial laryngeal nerve), aortic sinus and body, taste (on epiglottis), thoracic and abdominal viscera

Motor - pharyngeal mm. (swallowing), cricothyroideus m. (Cranial laryngeal n.)

Visceral Motor (PSNS) - thoracic and abdominal viscera, smooth muscles and glands

28
Q

What does CN XI supply?

A

Motor - Cleidocephalicus, sternocephalicus, trapezius, intrinsic laryngeal mm. (via caudal laryngeal br of recurrent laryngeal nerve)

29
Q

What does CN XII supply?

A

Motor - muscles of tongue

30
Q

What foramina/canals does CN I travel through?

A

Foramina of cribriform plate of the ethmoid bone

31
Q

What foramina/canals does CN II travel through?

A

Optic foramen, optic canal

32
Q

What foramina/canals does CN III travel through?

A

Orbital fissure

33
Q

What foramina/canals does CN IV travel through?

A

Orbital fissure

34
Q

What foramina/canals does CN VI travel through?

A

Orbital fissure

35
Q

What foramina/canals does Ophthalmic branch of CN V travel through?

A

Orbital fissue

36
Q

What foramina/canals does Maxillary Nerve of CN V travel through?

A

Round foramen, alar canal, rostral alar foramen

37
Q

What foramina/canals does Infraorbital Nerve of Maxillary Nerve of CN V travel through?

A

Maxillary foramen –> infraorbital canal –> infraorbital foramen

38
Q

What foramina/canals does the Mandibular nerve of CN V travel through?

A

Oval foramen

39
Q

What foramina/canals does the Inferior Alveolar Nerve of the Mandibular Nerve of CN V travel through?

A

Mandibular foramen –> mandibular canal –> mental foramina

40
Q

What foramina/canals does CN VII travel through?

A

internal acoustic meatus –> facial canal –> stylomastoid foramen

41
Q

What foramina/canals does CN VIII travel through?

A

internal acoustic meatus

42
Q

What foramina/canals does CN IX travel through?

A

leave cranium via jugular foramen and tympanooccipital fissure

43
Q

What foramina/canals does CN X travel through?

A

leave cranium via jugular foramen and tympanooccipital fissure

44
Q

What foramina/canals does CN XI travel through?

A

leave cranium via jugular foramen and tympanooccipital fissure

45
Q

What foramina/canals does CN XII travel through?

A

leaves cranial cavity via hypoglossal foramen

46
Q

Which nerves leave cranium via jugular foramen and tympanooccipital fissure?

A

CN IX, X, XI

47
Q

Which nerves go through the orbital fissure?

A

CN III, IV, VI and Ophthalmic branch of CN V

48
Q

Which cranial nerves contain a PSNS component?

A

CN III - instrinsic eye muscles
CN VII - salivary and lacrimal glands
CN IX - parotid/zygomatic salivary glands
CN X - thoracic and abdominal viscera, smooth muscles, glands

3, 7, 10, 9 it’s Parasympathetic Time :)

49
Q

Which nerves have fibers for taste?

A

Rostral 2/3 = Facial (7)

Caudal 1/3 = Glossopharyngeal (9)

50
Q

Which nerves innervate the extrinsic muscles of the eye?

A

Oculomotor (CN III) - DVM (Dorsal, Ventral, Medial rectus), ventral oblique, levator palpebrae superioris

Trochlear (CN IV) - Dorsal Oblique

Abducent (CN VI) - Lateral rectus, retractor bulbi

RUSVM Gross Anatomy II (Orange) (9 decks)

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