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pance prep > Cranial Nerves > Flashcards

Cranial Nerves Flashcards

1
Q

Name cranial nerve I and its functions.

A

Olfactory nerve

  • Sensory - smell
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2
Q

Name cranial nerve II and its functions.

A

Optic nerve

  • Sensory - visual acuity, visual fields, and pupillary light reflex
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3
Q

Name cranial nerve III and its functions.

A

Oculomotor

  • Motor - inferior rectus, ciliary body
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4
Q

Name cranial nerve IV and its functions.

A

Trochlear

  • Motor - superior oblique
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5
Q

Name cranial nerve V and its functions.

A

Trigeminal

  • Motor - muscles of mastication, closing jaw, move chin side to side
  • Sensory - light touch with cotton for 3 divisions of nerve (ophthalmic, maxillary, mandibular)
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6
Q

Name cranial nerve VI and its functions

A

Abducens

  • Motor - lacteral rectus
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7
Q

Name cranial nerve VII and its functions.

A

Facial

  • Motor - muscles of facial expression (blinking, raising eyebrows, frown, smile, close eyes tightly, puff cheeks)
  • Sensory - taste for anterior 2/3 of tongue
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8
Q

Name cranial nerve VIII and its functions.

A

Vestibulocochlear

  • Hearing, speech
  • Vestibular function - balance, proprioception
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9
Q

Name cranial nerve IX and its functions.

A

Glossopharyngeal

  • Motor - swallow, gag reflex
  • Sensory - taste for posterior 1/3 of tongue
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10
Q

Name cranial nerve X and its functions.

A

Vagus

  • Motor - voice, soft palate, gag reflex
  • Sensory - relays sensory info to the brain about organs
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11
Q

Name cranial nerve XI and its functions.

A

Accessory

  • Shoulder shrug, turning head from side to side
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12
Q

Name cranial nerve XII and its functions.

A

Hypoglossal

  • Tongue movements - inspect for fasiculations and asymmetry
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13
Q

What are the sensory and motor functions of C5?

A
  • Motor - shoulder abduction, elbow flexion
  • Sensory - axillary nerve
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14
Q

What muscles does C5 innervate?

A

Deltoid and biceps

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15
Q

What are the motor functions of C6? What reflex is C6 responsible for?

A
  • Motor - elbow flexion, wrist extension
  • Reflex - brachioradialis
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16
Q

What muscles does C6 innervate?

A

Brachioradialis, Extensor carpi radialis

17
Q

What are the motor functions of C7? What reflex is C7 responsible for?

A
  • Motor - elbow extension, wrist flexion
  • Reflex - triceps jerk
18
Q

What muscles does C7 innervate?

A

Triceps, flexor carpi radialis

19
Q

What are the sensory and motor functions of C8?

A
  • Motor - finger flexion
  • Sensory - median nerve
20
Q

If S1-S2 are damaged, what reflex is affected?

A

Achilles (ankle jerk)

21
Q

If L3-L4 are damaged, what reflex is affected?

A

Patellar (knee jerk)

22
Q

If C5-C6 are damaged, what reflex is damaged?

A

Biceps and brachioradialis

23
Q

If C7-C8 are damaged, what reflex is affected?

A

Triceps

24
Q

Name the landmark dermatomes.

A
  • T4 - nipple
  • T7 - xiphoid process
  • T10 - umbilicus
  • L1 - inguinal ligament
  • L4 - includes the kneecaps
  • S2, S3, S4 - sensation in penile and anal zones
25
Q

What are the functions of L4? What areas are innervated by L4?

A
  • Action - ankle dorsiflexion
  • Sensory - anterior thigh, medial ankle
26
Q

What are the functions of L5? What areas of the body does L5 innervate?

A
  • Action - big toe dorsiflexion
  • Sensory - lateral thigh, hip, groin; dorsum of the foot especially between 1st and 2nd toes
27
Q

What are the functions of S1? What parts of the body does S1 innervate?

A
  • Action - plantar flexion
  • Sensory - posterior leg, calf, gluteus, plantar surface of the foot

pance prep (4 decks)

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