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BIOS 483 > Cranial Nerves > Flashcards

Cranial Nerves Flashcards

1
Q

Cranial nerves I-XII

A

I. Olfactory
II. Optic
III. Oculomotor
IV. Trochlear
V. Trigeminal
VI. Abducens
VII. Facial
VIII. Vestibulocochlear
IX. Glossopharyngeal
X. Vagus
XI. Accessory
XII. Hypoglossal

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2
Q

Sensory cranial nerves (afferent)

A
  • olfactory
  • optic
  • vestibulocochlear
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3
Q

Motor cranial nerves (efferent)

A
  • oculomotor
  • trochlear
  • abducens
  • accessory
  • hypoglossal
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4
Q

Mixed cranial nerves

A
  • trigeminal
  • facial
  • glossopharyngeal
  • vagus
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5
Q

Olfactory nerve function

A
  • Sensory
  • sense of smell
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6
Q

Optic nerve function

A
  • sensory
  • vision
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7
Q

Extrinsic eye muscles control

A
  • oculomotor
  • trochlear
  • abducens
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8
Q

Oculomotor functions

A
  • motor
  • raising eyelid
  • directing eyeball
  • constricting the iris
  • control lens shape
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9
Q

Trochlear nerve function

A
  • motor
  • projects to superior oblique muscle intorts (twist)
  • depresses and abducts globe
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10
Q

Trigeminal nerve function

A
  • motor
  • projects to muscles of mastication and sensory to face, scalp, oral cavity
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11
Q

Trigeminal neuralgia

A
  • long term pain disorder
  • severe sudden shock of pain
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12
Q

Abducens nerve function

A
  • motor
  • projects to lateral rectus muscle (abducts eye)
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13
Q

Facial nerve functions

A
  • mixed
  • motor to muscles of facial expression
  • parasympathetic stimulation of lacrimal, submandibular, and sublingual glands
  • sensation to anterior 2/3 of tongue, ear canal, and tympanic membrane
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14
Q

Bells palsy

A
  • temporary facial paralysis
  • facial nerve damage
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15
Q

Vestibulocochlear nerve function

A
  • sensory
  • hearing (cochlear) and balance (vestibular)
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16
Q

Glossopharyngeal functions

A
  • motor: innervates part of tongue and pharynx, provides motor fibers to parotid salivary gland (parasympathetic)
  • sensory: fibers conduct taste and general sensory impulses from the tongue and pharynx
17
Q

Vagus nerve functions

A
  • motor: parasympathetic fibers to heart, lungs, and visceral organs
  • sensory: taste
  • visceral sensation from organs
18
Q

Accessory nerve function

A

Innervates trapezius and sternocleidomastoid which moves head and neck

19
Q

Hypoglossal nerve function

A

Innervates both extrinsic and intrinsic muscles of the tongue which contribute to swallowing and speech

20
Q

Pheromones

A

Secreted chemical factor that triggers a social response in members of the same species

21
Q

Pheromone types

A
  • alarm
  • food trail
  • sex
22
Q

Terminal nerve (CN 0)

A
  • vestigial or may be related to the sensation of pheromones
  • projects to areas involved in regulating sexual behavior

BIOS 483 (14 decks)

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