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Anatomy Written 2 > Cranial Nerves > Flashcards

Cranial Nerves Flashcards

(48 cards)

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1
Q

CN I

A

Olfactory
Sensory
Special Visceral Afferent

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2
Q

CN I Leave and Enter

A

Nerves leave nasal canal (roof) to enter the anterior cranial fossa through cribriform plate of ethmoid
Enters the limbic lobe
Tract of Cerebral Cortex

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3
Q

CN II

A

Optic
Sensory
Special Somatic Afferent
Rods and Cones are receptors

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4
Q

CN II Leave and Enter

A

Leave the eyeball from Retina to form optic nerve
Enter anterior cranial fossa through optic canal
Specific retinal fibers cross at Chiasm
Tract leads fibers to thalamus
FIbers called radiations lead to the cortex surrounding Calcarine Fissure

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5
Q

CN III

A

Oculomotor
Motor
General Somatic Efferent
General Visceral Efferent

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6
Q

CN III - General Somatic Efferent

A

Motor to extraocular muscles

  • Levator palpebrae superioris
  • Superior rectus
  • Inferior rectus
  • Medial rectus
  • Inferior oblique
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7
Q

CN III - General Visceral Efferent

A

Parasympathetic Motor
Ciliary Ganglion
Ciliary muscle and sphincter pupillae

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8
Q

CN III Enters and leaves

A

Emerges from midbrain from interpeduncular fossa into the middle cranial fossa to enter the superior orbital fissure

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9
Q

CN IV

A

Trochlear
Motor
General Somatic Efferent
Motor to Superior Oblique Muscle

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10
Q

CN IV Leaves and Enters

A

Only cranial nerve to leave brainstem from dorsal aspect
Emerges from midbrain posteriorly
Leaves middle cranial fossa through superior orbital fissure

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11
Q

CN V

A

Trigeminal
Both
General Somatic Afferent
Special Visceral Efferent

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12
Q

CN V - General Somatic Afferent

A

Sensory from face, orbit, nasal, and oral cavities
3 branches arise from pons
Proprioceptive fibers from muscles carried in oculomotor trochlear (IV) Abducens (VI) and Hypoglossal (XII) nerves
Nerve impulses sent to trigeminal nucleus

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13
Q

CN V branches enter and leave

A

Ophthalmic - leaves cranial vault through superior fissure
Maxillary - leaves cranial vault through foramen rotundum
Mandibular - leaves cranial vault through foramen ovale

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14
Q

CN V - Special Visceral Efferent

A

Branchial Motor
Motor to muscles of masstication (temporalis, masseter, medial and lateral pterygoid)
Mylohyoid, ant belly of digastric, tensor tympani, tensor veli palatini

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15
Q

CN VI

A

Abducens
Motor
General Somatic Efferent - motor to the lateral rectus muscles

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16
Q

CN VI - Leaves and enters

A

Arises near midline of pontomedullary junction
Nucleus is located in the pons
Leaves middle cranial fossa to enter the orbit through the superior orbital fissure

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17
Q

CN VII

A 
Facial 
Both
Special Visceral Efferent 
General Visceral Efferent
General Somatic Afferent
Special Visceral Afferent
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18
Q

CN VII - Special Visceral Efferent

A

Motor to muscles of facial expression, stylohyoid, and pot belly of digastic

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19
Q

CN VII - General Visceral Efferent

A

Parasympathetic motor
Pterygopalatine and submandibular ganglia
Lacrimal, nasal, and palatine glands, submandibular and sublingual glands

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20
Q

CN VII - General Somatic Afferent

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A

Sensory to external auditory meatus

21
Q

CN VII - Special Visceral Afferent

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A

Taste to anterior 2/3 of tongue

22
Q

CN VII - enters and leaves

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A

Leaves cranial vault through internal auditory meatus

Emerges from the skull via stylomastoid foramen

23
Q

CN VIII

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A 
Vestibulocochlear
Sensory
Two main branches arise from the pons
- Vestibular nerve
- Cochlear nerve
Special Somatic Afferent (balance, position, hearing)
24
Q

CN VIII Enters and leaves

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A

ENters the internal auditory meatus to internal ear in petrous portion of temporal bone within posterior cranial fossa

25
CN IX
``` Glossopharyngeal Both Special Visceral Efferent General Visceral Efferent General Somatic Afferent Special Visceral Afferent General Visceral Afferent ```
26
CN IX - Special Visceral Effernet
Branchial Motor | Motor to pharyngeal constrictors and stylopharyngeus
27
CN IX - General Visceral Efferent
Parasympathetic motor Otic ganglion Parotid gland
28
CN IX - General Somatic Afferent
General sense to post 1/3 of tongue
29
CN IX - Special Visceral Afferent
Taste to post 1/3 of tongue
30
CN IX - General Visceral Afferent
Carotid sinus, body
31
CN IX - leaves and enters
Leaves medulla posterior to olive | Enters jugular foramen to leave posterior cranial fossa
32
CN X
``` Both Special Visceral Efferent General Visceral Efferent General Somatic Afferent General Visceral Afferent Special Visceral Afferent ```
33
CN X - Special Visceral Efferent
BRanchial Motor | Motor to muscles of the larynx, pharynx, and palatoglossus
34
CN X - General Visceral Efferent
Parasympathetic motor Ganglia within the walls of the organs it innervates Thoracic and abdominal viscera through the left colic flexure of the large intestine
35
CN X -General Somatic Afferent
Sensory to external auditory meatus
36
CN X - General Visceral Afferent
Aorta baro and chemoreceptors
37
CN X - Special Visceral Afferent
Taste to epiglottic region
38
CN X leaves and enters
Emerges from medulla behind the olive | Leaves posterior cranial fossa through jugular fossa
39
CN XI
Accessory Motor General Somatic Efferent (Trap and SCM)
40
CN XI Leaves and Enters
Arises from upper cervical spinal cord, ascends to enter foramen magnum Only CN to not come off the brain Joins CNs IX and X to elave posterior cranial fossa through jugular foramen
41
CN XII
Hypoglossal Motor General Somatic Efferent Motor to all intrinsic and extrinsic muscles of tongue (except palatoglossus)
42
CN XII enters and leaves
Arises from medulla, nerves emerge anterior to olive | Leaves posterior cranial fossa through hypoglossal canal
43
Central Connections - Rules of 4
Brainstem origin 12 CN for 3 structures of the brainstem (midbrain, pons, medulla) Utilized for quick localization of stroke symptoms in brainstem
44
Parasympathetics
CN 3, 7, 9, 10
45
Parasympathetics (3)
Sphincter pupillae | Ciliary muscles
46
Parasympathetics (7)
Lacrimal gland Submandibular and sublingual glands Nasal and palatine glands
47
Parasympathetic (9)
Parotid gland
48
Parasympathetic (10)
Thoracic and abdominal viscera to left colic flexure of the large intestine

Anatomy Written 2 (11 decks)

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