Pharyngeal Arches

Question 1

What are the 5 pharyngeal arches?

Answer 1

1. mandibular
2. hyoid
3. third
4. fourth
5. sixth

Question 2

Muscles of the mandibular arch

Answer 2

1st

mastication:
mylohyoid, anterior belly digastric

Question 3

Innervation of the mandibular arch

Answer 3

Trigeminal nerve (V3) - mandibular branch of the trigeminal nerve

Question 4

Muscles of the hyoid arch:

Answer 4

facial expression:

-posterior belly digastric, stylohyoid

Question 5

Innervation of the hyoid arch:

Answer 5

facial nerve - CN VII

Question 6

Muscles of the 3rd pharyngeal arch

Answer 6

stylopharyngeus

Question 7

Innervation of the 3rd pharyngeal arch

Answer 7

glossopharyngeal nerve IX

Question 8

Muscles of the 4th pharyngeal arch

Answer 8

cricothyroid, inferior pharyngeal constrictor

Question 9

Innervation of the 4th pharyngeal arch

Answer 9

vagus nerve X, superior laryngeal branch

Question 10

Muscles of the sixth pharyngeal arch

Answer 10

Intrinsic laryngeal–> for changing tension on the vocal cords (sound production)

Question 11

Innervation of the 6th laryngeal arch

Answer 11

vagus nerve X - recurrent laryngeal branch

Question 12

What are the two types of motor axons:

Answer 12

motor–> skeletal muscle

branchial motor –> motor innervation of skeletal muscle that arose from the pharyngeal arches

Question 13

What are the 4 categories of sensory axons:

Answer 13

1. impulses from skin
2. impulses from viscera
3. special sensory- taste, smell
4. special sensory- vision, hearing, equilibrium

Question 14

What is the function of preganglionic and postganglionic sympathetic and parasympathetic axons?

Answer 14

innervation of smooth muscle