Cranial Nerve Function and sensory/motor

Question 1

olfactory

Answer 1

• smell
• direct connections with telencephalon (bypasses thalamus)
• Special Sensory

Question 2

optic

Answer 2

• vision
• projects image to thalamus and midbrain
• Special Sensory

Question 3

oculomotor

Answer 3

• somatic motor- oculomotor nucleus, 4/6 extrinsic muscles, levator palpebrae
• Visceral Motor- EW nucleus, intrinsic eye muscles -> pupil constrictions and flatten lens

Question 4

trochlear

Answer 4

• innervates superior oblique muscles -> eye intorsion
• eye movements with III and VI
• Somatic motor

Question 5

trigeminal

Answer 5

• General Sensory: somethesia from in- and outside surfaces of head
• Branchial Sensory: muscles of mastication, tensor tympani

Question 6

abducens

Answer 6

• lateral rectus muscle -> eye abduction
• controls eye movements with III and IV
• Somatic Motor

Question 7

Facial

Answer 7

• General Sensory: somethesia from external ear
• Special Sensory: taste from front 2/3 of tongue
• Visceral Motor: all salivary glands except parotid
• branchial motor- muscles of facial expression, stapedius

Question 8

Vestibulocochlear

Answer 8

• hearing
• balance
• Special Sensory

Question 9

Glossopharyngeal

Answer 9

• General Sensory: somethesia to back 1/3 of tongue and faucial pillars
• Special Sensory: taste for back 1/3 of tongue
• Visceral Sensory: corotid body
• Visceral Motor: parotid gland (salivatory)
• Branchial Motor: stylopharyngeus muscle

Question 10

Vagus

Answer 10

• General Sensory: somethesia from part of outer ear
• Special Sensory: taste from epiglottic area
• Visceral sensory: pharynx, larynx, and viscera
• Visceral Motor: viscera of thoracic and abdominal regions
• Branchial Motor: laryngeal, pharyngeal, and palatal muscles

Question 11

Spinal Accessory

Answer 11

• sternocleidomastoid and trapezius muscles

- Branchial Motor

Question 12

Hypoglossal

Answer 12

• all intrinsic and extrinsic muscles of the tongue

- Somatic Motor