Embryology

Question 0

Derivatives of 2nd arch

Answer 0

CN VII

Bones: styloid process, lesser horn hyoid, stapedius (neural crest derived)
Muscles: M. of facial expression, stapedius, post. digrastic. (mesoderm derived)

Question 1

Derivatves of the 1st arch

Answer 1

assoc with CN V

Facial bones: maxilla, zygomatic, incus, maleus, vomer, pallitine (neural crest derived)
Muscles: M. of mastication, ant. digastric, mylohyoid, tensor tympani, tensor palitini (mesoderm derived)