Temporal Region, Infratemporal Region, and Innervation of Masseter and Medial and Lateral Pterygoids

Question 1

What forms the floor of the temporal region?

Answer 1

pterion (sphenoid, parietal, temporal, frontal bones)

Question 2

What is the major feature of the temporal region?

Answer 2

temporalis muscle

Question 3

What forms the medial boundary of the infratemporal region?

Answer 3

lateral pterygoid plate of the sphenoid

Question 4

What forms the lateral boundary of the infratemporal region?

Answer 4

ramus of the mandible

Question 5

What are the contents of the infratemporal region

Answer 5

medial and lateral pterygoid muscles, internal maxillary artery and branches, pterygoid venous plexus, internal maxillary vein, branches of the trigeminal and facial nerves and otic ganglion

Question 6

What is the embryonic origin of skeletal muscles innervated by the trigeminal nerve?

Answer 6

the skeletal muscles is derived from the branchial arches hence Branchial Efferent (BE)

Question 7

Identify the muscles of mastication

Answer 7

temporalis, masseter, medial pterygoid, lateral pterygoid