First (mandibular) branchial arch (dave's notes)

Question 1

How is the first branchial arch formed

Answer 1

The right and left sides fuse in the midline

Question 2

Chondrification in the mesoderm produces what?

Answer 2

Meckel’s cartilage

Question 3

What appears on each side of the first branchial arch?

Answer 3

Cranial bumps, ??forming the maxillary process, which grow together meeting each other and the nasal processes to become the upper jaw and palate

Question 4

What are the ecto and endo derivatives of the first branchial arch?

Answer 4

Mucous membranes and glands (in the anterior 2/3rds of the tongue).

Question 5

What are taste buds supplied by?

Answer 5

The chord tympani branch of the fascial nerve (is the pre-cleft branch of the facial nerve)

Question 6

What are the meso derivatives of the first branchial arch?

Answer 6

The muscles of mastication, mylohyoid, anterior digastric, tensors palate and tympani (n. mandibular nerve)

Question 7

What is the artery of the first branchial arch?

Answer 7

The first aortic arch, part of which persists as the maxillary artery.

Question 8

What is significant about the maxillary branch of the trigeminal nerve?

Answer 8

Note that the maxillary process has its own sensory nerve - the maxillary branch of the trigeminal nerve.