Infratemporal region

Question 1

What forms the medial boundary of the infratemporal region?

Answer 1

lateral pterygoid plate of the sphenoid

Question 2

What forms the lateral boundary of the infratemporal region?

Answer 2

ramus of the mandible

Question 3

What are the contents of the infratemporal region?

Answer 3

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

Question 4

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

Answer 4

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

Question 5

Identify the muscles of mastication.

Answer 5

temporalis, masseter, medial pterygoid, lateral pterygoid

Question 6

What is the innervation for each of the muscles of mastication?

Answer 6

medial pterygoid muscle - medial pterygoid nerve, mandibular division, trigeminal nerve
lateral pterygoid muscle - lateral pterygoid nerve, mandibular division, trigeminal nerve
masseter muscle - masseteric nerve, mandibular division, trigeminal nerve
temporalis muscle - anterior and posterior deep temporal nerves, mandibular division, trigeminal