Brachial arch muscles

Question 1

1st arch

Answer 1

Muscles of mastication: (temoralis, masseter, lateral and medial pterygoids)

Mylophyoid,
anterior belly of digastic (vs. 2nd)
tensor tympani,
tensor veli palatini

Question 2

2nd arch

Answer 2

Muscles of facial expression.
Stapedius,
Stylophyoid
Posterior belly of digastic (vs. 1st)

Question 3

3rd arch

Answer 3

Stylopharyngeus

think of stylopharyngeus innervated by glossopharyngeal nerve

Question 4

4-6th arches

Answer 4

4th arch: most pharyngeal constrictors: cricothyroid, levator veli palatini

6th arch: all intrinsic muscles of larynx except cricothyorid