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Anatomy Unit 2 > Cranial Nerves Pt. 2 > Flashcards

Cranial Nerves Pt. 2 Flashcards

1
Q

Originates: Pontomedullary groove (between the AICA and the Labyrinthe Artery)
Exits: Superior Orbital Fissure

A

Abducens Nerve (CN VI)

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2
Q

Supplies SVE fibers (motor) to the Lateral Rectus muscle

A

Abducens Nerve (CN VI)

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3
Q

Lesion in this makes you cross-eyed

A

Abducens Nerve (CN VI)

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4
Q

Originates: Lateral Pontomedullary Groove. “Cerebellopontine angle”

Exits: Internal Acoustic Meatus

A

Facial Nerve (CN VII)

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5
Q

Greater Petrosal nerve, Chorda Tympani nerve, and Somatic nerve

A

Branches of the Facial Nerve

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6
Q

Lips sagging, smoothing of forehead, inability to close the eye, loss of nasolabial fold (skin to lateral aspect of mouth), drooping of mouth.

A

Bell’s Palsy

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7
Q

Exits via the Petrous portion of the temporal bone.

A

Greater Petrosal Branch of the Facial nerve (VII)

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8
Q

Supplies GVE fibers (parasympathetic innervation) to the Lacrimal gland, mucus glands in nasal cavity and palate.

A

Greater Petrosal Branch of the Facial nerve (VII)

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9
Q

Pons of CNS (Superior Salivatory Nucleus) -> Parasympathetic preganglionic fibers of Greater Petrosal n. -> Pterygopalatine Ganglion -> originates new, postganglionic fibers -> hitches a ride via Zygomaticotemporal n. (V2) and Lacrimal n. (V1)-> Nasal & Palatine branches of V2 -> Inc in secretions in Lacrimal glands, nasal cavity, and palate

A

Greater Petrosal Branch of the Facial Nerve Parasympathetic innervation

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10
Q

The pterygopalatine ganglion sits in this. A small indentation cave that sits within the infratemporal fossa

A

Pterygopalatine Fossa

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11
Q

Cardiac Plexus → postganglionic sympathetics → Deep Petrosal n. → Joins Greater Petrosal n. to form Vidian n. → Vidian n. runs with Greater Petrosal n. until Pterygopalatine Ganglion → Vidian n. runs right through Ganglion and doesn’t synapse → Lacrimal Gland, nasal cavity, palate

A

Greater Petrosal Branch of the Facial Nerve Sympathetic innervation

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12
Q

When the Greater Petrosal Nerve joins up with the Deep Petrosal nerve.

A

Vidian Nerve

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13
Q

Exits Petrous portion of temporal bone via petrotympanic fissure (little slit)
Hitches a ride with Lingual nerve.
-Lingual nerve carries these fibers along with gen sen from V3.

A

Chorda Tympani Branch of Facial Nerve (CN VII)

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14
Q

Supplies GVE fibers (Parasympathetic) to the Submandibular gland and sublingual gland.

A

Chorda Tympani Branch of Facial Nerve (CN VII)

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15
Q

Supplies SVA fibers (taste) to anterior 2/3 of tongue

A

Chorda Tympani Branch of Facial Nerve (CN VII)

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16
Q

Pons of CNS (Superior Salivatory Nucleus → parasympathetic, preganglionic fibers running in Chorda Tympani n. → Submandibular Ganglion → new parasympathetic fibers originate → submandibular and sublingual glands → increase in saliva

A

Chorda Tympani Branch of Facial Nerve (CN VII) Parasympathetic Innervation

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17
Q

Exits via the Stylomastoid Foramen.

All 5 branches pass through the Parotid Gland.

A

Somatic Branch of Facial Nerve (CN VII)

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18
Q

Temporal nerve, Zygomatic nerve, Buccal nerve, Mandibular nerve, and Cervical nerve

A

Branches of the Somatic Branch of the Facial Nerve (CN VII)

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19
Q

Supplies SVE fibers (motor) to the muscles of facial expression (Platysma), Stylohyoid, Posterior belly of digastric, and Stapedius

A

Somatic Branch of Facial Nerve (CN VII)

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20
Q

Swelling of the Parotid gland = loss of function

A

Somatic Branch of Facial Nerve (CN VII)

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21
Q

Originates: Lateral Pontomedullary groove. “Cerebellopontine angle”.

Exits: Internal Acoustic Meatus

A

Vestibulocochlear Nerve (CN VIII)

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22
Q

Cochlear nerve and Vestibular nerve

A

Branches of the Vestibulocochlear Nerve (CN VIII)

23
Q

Supplies SSA fibers for hearing

A

Cochlear nerve (Branch of the Vestibulocochlear Nerve (CN VIII)).

24
Q

Supplies SVA fibers for equilibrium and balance

A

Vestibular nerve (Branch of the Vestibulocochlear Nerve (CN VIII)).

25
Q

Will cause problems with balance, equilibrium, hearing, and possibly muscles of facial expression (same location as CN VII)

A

Acoustic Neuroma (tumor of CN VIII)

26
Q

Originates: Where the Pons transition to the Medulla.

Exits: Jugular Foramen

A

Glossopharyngeal Nerve (CN IX)

27
Q

Superior Sensory Ganglia, Inferior Sensory Ganglia, Tympanic nerve, and Lesser Petrosal nerve

A

Branches of the Glossopharyngeal Nerve (CN IX)

28
Q

Supplies GSA fibers (sensory) to the oropharynx and posterior 1/3 of the tongue

A

Glossopharyngeal Nerve (CN IX)

29
Q

Supplies SVA fibers (taste) to the posterior 1/3 of the tongue

A

Glossopharyngeal Nerve (CN IX)

30
Q

Supplies SVE fibers (motor) to the Stylopharyngeus muscle

A

Glossopharyngeal Nerve (CN IX)

31
Q

Supplies GVA fibers to measure blood pressure from the Carotid Sinus

A

Glossopharyngeal Nerve (CN IX)

32
Q

Supplies GVE fibers (parasympathetic innervation) to the Parotid Gland

A

Glossopharyngeal Nerve (CN IX)

33
Q

Medulla of CNS → Inferior Salivatory Nucleus → Tympanic n. → Middle Ear, breaks off into Plexus → Lesser Petrosal n. → parasympathetic, preganglionic fibers → Otic Ganglion → postganglionic fibers that run with Auriculotemporal n. (V3) → Parotid Gland

A

Glossopharyngeal Nerve (CN IX) Parasympathetic innervation

34
Q

Originates: Medulla posterior to the Olives

Exits: Jugular Foramen

A

Vagus Nerve (CN X)

35
Q

Superior Laryngeal Nerve -> Internal and External Branches

Recurrent Laryngeal Nerve

A

Vagus Nerve (CN X)

36
Q

Supplies SVE fibers (Somatic Motor) to:
-the pharyngeal muscles (Except for stylopharyngeus m.), -soft palate (except Tensor Veli Palatini - V3)
-Laryngeal Intrinsic Muscles (Cricothyroid, lateral cricoarytenoids, etc. Recurrent Laryngeal does all except Cricothyroid - which is Superior Laryngeal Branch - External Branch)

A

Vagus Nerve (CN X)

37
Q

Supplies GSA fibers (sensory) to the External Auditory Canal and Larynx.

A

Vagus Nerve (CN X)

38
Q

Supplies GVE fibers (parasympathetic motor) to the thoracic and abdominal viscera all the way down to the Left Colic flexure (where the transverse colon bends on the L side to make the descending colon).

A

Vagus Nerve (CN X)

39
Q

Supplies GVA fibers (sensory) to abdominal and thoracic viscera, mainly in peritoneum, pericardium, and pleural membranes

A

Vagus Nerve (CN X)

40
Q

Issues with this nerve cause difficulty swallowing or uvula hanging crooked

A

Vagus Nerve (CN X)

41
Q

Medulla of CNS → Dorsal Vagal Motor Nucleus → parasympathetic, preganglionic fibers of Vagus Nerve → Tiny Ganglia in walls of the viscera (heart, bronchial tree, stomach, intestines up until L colic flexure)→ originate new, short postganglionic fibers → Viscera of heart, pulmonary airways, GI Tract

A

Vagus Nerve (CN X) parasympathetic innervation

42
Q

Originates: C1-C4 as spinal roots, ascends into cranial cavity through foramen magnum

Exits: Jugular Foramen

A

Spinal Accessory nerve (CN XI)

43
Q

Supplies SVE fibers (motor) to the Trapezius and Sternocleidomastoid muscles

A

Spinal Accessory nerve (CN XI)

44
Q

Test this CN: Turn head side to side; shrug shoulders

A

Spinal Accessory nerve (CN XI)

45
Q

Originates: Medulla anterior to the Olives

Exits: Hypoglossal Canal

A

Hypoglossal nerve (CN XII)

46
Q

Provides SVE fibers (motor) to the tongue muscles (except Palatoglossus muscle)

A

Hypoglossal nerve (CN XII)

47
Q

What are the parasympathetic nerves?

A

CN 3, 7, 9, 10 and Spinal Cord segments 2-4 (Bowel and bladder emptying)

48
Q

Moves toward CNS (sensory or dorsal)

A

Afferent

49
Q

Moves away from CNS (motor or ventral)

A

Efferent

50
Q

Body in general, sensation of skin

A

Somatic

51
Q

Guts & internal organs & vessels & glands

A

Visceral

52
Q

Small diameter, slow conduction, no myelin. Preganglionic → Postganglionic

A

Autonomic Motor Fibers

53
Q

Large diameter, myelinated, rapid conduction. From spinal cord → muscles

A

Somatic Efferent Fibers

Anatomy Unit 2 (9 decks)

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