Cranial nerves

Question 1

Cranial Nerve I

Answer 1

Olfactory:
-Sensory (afferent)
-Sense of smell
-Centers in temporal lobe

Question 2

Cranial Nerve II

Answer 2

Optic:
-Sensory (afferent)
-Vision
-Centers in occipital lobes

Question 3

Cranial Nerve III

Answer 3

Occulomotor:
-Motor (efferent)
-Somatic function: Controls muscles that move the eye
-Autonomic function: Controls pupil constriction and dilation

Question 4

Cranial Nerve IV

Answer 4

Trochlear:
-Motor (efferent)
-Controls muscles that move the eye

Question 5

Cranial Nerve V

Answer 5

Trigeminal Nerve:
-Sensory + motor
-Sensation of the face
-Motor control of muscles of mastication (chewing)

Question 6

Cranial Nerve VI

Answer 6

Abducens Nerve:
-Motor (efferent)
-Controls muscles that move the eye; abduction

Question 7

Cranial Nerve VII

Answer 7

Facial Nerve:
-Sensory and Motor
-Controls muscles of facial expression
-Delivers taste information from tongue

Question 8

Cranial Nerve VIII

Answer 8

Vestibulocochlear Nerve:
-Sensory (afferent)
-Two nerves in one:
1: Cochlear (auditory) nerve; hearing
2: Vestibular nerve; balance

Question 9

Cranial Nerve IX

Answer 9

Glossopharyngeal nerve:
-Sensory and motor
-Taste and touch from tongue
-control of pharyngeal muscles (swallowing)

Question 10

Cranial Nerve X

Answer 10

Vagus nerve:
-Sensory and motor
-Sensation from organs (viscera)
-Parasympathetic motor control of many organs: Decreased BP and HR, increased digestive activities, increased blood flow to kidneys, increased reproductive activity

Question 11

Cranial Nerve XI

Answer 11

Accessory nerve:
-Motor (efferent)
-Controls some muscles that position and move the head

Question 12

Cranial Nerve XII

Answer 12

Hypoglossal:
-motor (efferent)
-controls tongue movement