Unit III - Zygomatic bones

Question 1

What are the 3 parts of the zygomatic bones?

Answer 1

lateral surface

temporal surface

orbital surface

Question 2

What attaches to the lateral surface of the zygomatic bones?

Answer 2

(1) zygomaticus major muscle
attachment: zygomatic bone –> angle of mouth
function: raises the buccal angle
innervation: facial n. (buccal & zygomatic branches)
blood supply: facial, superior labial, transverse facial and infraorbital a.

(2) masseter muscle
attachment: zygomatic arch –> angle of mandible and lateral aspect of the ramus
function: elevation, protraction and retraction (deep fibers) of mandible
innervation: mandibular n.
blood supply: masseteric, facial, transverse facial a.