Branchial Arch Derivatives

Question 1

Meckel cartiliage: Mandible, Malleus/incus, sphenoMandibular ligament

Answer 1

1st arch

Question 2

Muscles of Mastication:
temporalis, Masseter, later and Medial pterygoids, Mylohyoid, anterior belly of digastric, tensor tympani, tensor veli palatini

Answer 2

1st arch

Question 3

CN V2 and V3 (chew)

Answer 3

1st arch

Question 4

Reichart cartilage:

Stapes, Styloid process, lessor horn of hyoid, Stylohyoid ligament

Answer 4

2nd arch

Question 5

Muscles of facial expression, Stapedius, Stylohyoid, platySma, posterior belly of digastric

Answer 5

2nd arch

Question 6

CN VII (facial expression aka smile)

Answer 6

2nd arch

Question 7

Cartilage: greater horn of hyoid

Answer 7

3rd arch

Question 8

Stylopharyngeus (which is innervated by glossopharyngeal nerve)

Answer 8

3rd arch

Question 9

CN IX (stylopharyngeus)

Swallow stylishly

Answer 9

3rd arch

Question 10

Cartilages: thyroid, cricoid, arytenoids, corniculate, cuneiform

Answer 10

4-6th arch

Question 11

Most pharyngeal constrictors; cricothyroid, levator veli palatini

Answer 11

4th arch

Question 12

CN X (superior laryngeal branch)
Simply swallow

Answer 12

4th arch

Question 13

All intrinsic muscles of larynx except cricothyroid

Answer 13

6th arch

Question 14

CN X (recurrent laryngeal branch)
Speak

Answer 14

6th arch