Muscles of Swallowing

Question 1

What is the trigeminal (V) CN responsible for?

Answer 1

• Muscles of Mastication, elevated and depressor of mandible, further permitting side to side movement
• elevates tongue and floor of mouth

Question 2

What muscles does Trigeminal (V) innervate?

Answer 2

Temporalis
Masseter
Medial pterygoid
Lateral pterygoid
Tensor Veli Palatini
Mylohyoid
Digastic (anterior belly)

Question 3

What is the Facial (VII) CN responsible for?

Answer 3

-Muscles of the face
- closes, opens, protrudes, inverts, and twists lips
- facial expressions
- elevated hyoid and tongue base

Question 4

What muscles does the Facial (VII) CN innervate?

Answer 4

Orbicularis Oris
Zygomaticus minor
Levator labii superior
Lavator Labii superior alaque nasi
Zygomaticus major
Levator anguli oris
Depressor anguli oris
Depressor labii inferior
Mentalis
Risorius
Buccinator
stylohyoid

Question 5

What are the Vagus (X) and Accessory (XI) CN responsible for?

Answer 5

• Raises and stretched soft palate
• raises back of tongue
• closes naspharynx
  -shortens & raises uvula
  -intrinsic muscles of larynx
  -pharyngeal constictor muscles

Question 6

What muscles do the Vagus (X) and Accessory (XI) CN innervate?

Answer 6

Levator veli palatini
Palatoglosus
Palatopharngeus
Uvulae

Question 7

What is the hypoglossus (XII) responsible for?

Answer 7

• depresses, protrudes, & elevates up & back the tongue
• draws hyoid bone forward,
• depresses mandible when the hyoid bone is fixed

Question 8

What muscles does the hypoglossus (XII) innervate?

Answer 8

Hypoglossus
Genioglossus
Styloglossus
Geniohyoid

Question 9

What is the Glossopharyngeal (IX) responsible for?

Answer 9

-Narrows fauces
-elevates posterior tongue (which also involves vagus and accessory)

Question 10

what muscles does the glossopharyngeal (IX) innervate?

Answer 10

palatoglossus