Cranial Nerves used for Speech

Question 1

Cranial Nerve V (Trigeminal)

Answer 1

1. Motor: muscles of mastication, elevation of hyoid and larynx
2. Sensory: face sensation (cheek, chin, forehead)
   - Position of bolus in mouth
   - Oral mucosa, teeth and gum sensation

Question 2

Cranial Nerve VII (Facial Nerve)

Answer 2

1. Motor: facial expression muscles, shape and motion of lips
2. Sensory: taste in anterior 2/3 of tongue
   - Face/oral cavity sensation
   - Salivary gland stimulation

Question 3

Cranial Nerve IX (Glossopharyngeal)

Answer 3

1. Motor: larynx & pharynx elevation
   - Stylopharyngeous muscle
   -Pharyngeal constriction/shortening
2. Sensory: taste (posterior 1/3)
   - Gag reflex

Question 4

Cranial Nerve X (Vagus)

Answer 4

1. Motor: intrinsic laryngeal muscles, velopharyngeal closure, esophageal constriction. Composed of superior laryngeal and recurrent laryngeal
2. Sensory: Food residue in larynx, pharynx and esophagus

Question 5

Cranial Nerve XI (Accessory)

Answer 5

1. Motor: Innervates sternocleidomastoid muscle
   - Temporalis muscles
   - Velopharyngeal closure
   - Head turning, shoulder shrug

Question 6

Cranial Nerve XII (Hypoglossal)

Answer 6

Motor: innervates all intrinsic tongue muscles and all but 1 extrinsic
- Tongue motion, bolus preparation, removing particles
- Transport of bolus to pharynx