Cranial Nerves

Question 1

Olfactory (I) (1)

Answer 1

• Sensory
• Smell
• Ask the patients to identify odors (soap, coffee, cloves)

Question 2

Optic (II) (2)

Answer 2

• Sensory
• Vision
• Visual Fields → 4 visual quadrants → Direct and consensual pupillary responses, funduscopic examination

Question 3

Oculomotor (III) (3)

Answer 3

• Motor
• Functions of eye muscles
• Tested by following a moving target (examiners finger, penlight) → for 4 quadrants across the midline and onto the tip of the nose

Question 4

Trochlear (IV) (4)

Answer 4

• Motor
• Superior oblique muscles of the eye
• Tested by following a moving target (examiners finger, penlight) → for 4 quadrants across the midline and onto the tip of the nose

Question 5

Trigeminal (V) (5)

Answer 5

• Sensory
• Head (face, teeth, sinuses)
• Brushing a wisp of cotton against the lower or lateral cornea

Question 6

Abducent (VI) (6)

Answer 6

• Motor
• Lateral rectus muscle of the eye
• Tested by following a moving target (examiners finger, penlight) → for 4 quadrants across the midline and onto the tip of the nose

Question 7

Facial (VII) (7)

Answer 7

• Motor
• Muscles of facial expression, lacrimal gland, submaxillary gland, sublingual gland, as well as sensory supply to the anterior two-thirds of the tongue
• Can be tested with sweet, sour, salty and bitter solutions applied with a cotton swab

Question 8

Vestibulocochlear (VIII) (8)

Answer 8

• Sensory
• Hearing and equilibrium
• Hearing tests

Question 9

Glossopharyngeal (IX) (9)

Answer 9

• Motor
• Posterior one-third of the tongue and pharynx
• Palate elevates when a patient says “ah.” A tongue blade can be used to touch one side of the posterior pharynx, and symmetry of the gag reflex is observed.

Question 10

Vagus (X) (10)

Answer 10

• Motor
• Motor innervation to the heart, lungs, and gastrointes­tinal tract. It also provides sensory innervation to the heart, respiratory tract, gastrointes­tinal tract, and external ear
• The palate elevates when a patient says “ah.” A tongue blade can be used to touch one side of the posterior pharynx, and symmetry of the gag reflex is observed.

Question 11

Accessory (XI) (11)

Answer 11

• Motor
• Motor function to the sternocleidomastoid and trapezius muscles
• Patient asks to turn the head against resistance supplied by examiners hand

Question 12

Hypoglossal (XII) (12)

Answer 12

• Motor
• Innervates the muscles of the tongue
• Extending the tongue and inspecting for atrophy, fasciculations, and weakness

Question 13

Funny quizlet link

Answer 13

https://quizlet.com/479500561/on-occasion-oliver-tries-to-anally-finger-various-guys-vaginas-are-history-flash-cards/