Temporal fossa, zygomatic arch, temporalis fascia and temporalis (dave's notes)

Question 1

What are the boundaries of the temporal fossa?

Answer 1

There are two temporal lines: superior and inferior diverging from the zygomatic process, which bind the temporal fossa

Question 2

What is the roof of the temporal fossa? What is the floor?

Answer 2

Temporalis fascia, the floor is the skull

Question 3

What forms the anterior wall of the temporal fossa?

Answer 3

The zygomatic bone and process

Question 4

What fills the temporal fossa?

Answer 4

The temporalis muscles

Question 5

What forms the zygomatic arch?

Answer 5

The processes of the squamous temporal and zygomatic bones and completed anteriorly but he zygomatic process of the maxilla

Question 6

What nerves cross the zygomatic arch and where? What is the clinical significance of this?

Answer 6

The Auriculotemporal crosses well back. Temporal and zygomatic branches of the facial nerve also cross. They are all vulnerable.

Question 7

What are the attachments of temporalis fascia?

Answer 7

The superior temporal line and passes down to the upper border of the zygomatic arch

Question 8

Where does temporalis arise and insert?

Answer 8

Arises over the temporal fossa over the area between the inferior temporal line and the infra temporal crest. Inserts into the deepest part of the mandibular notch to the coronoid process.

Question 9

What is the blood supply to temporalis?

Answer 9

Temporal branches of the maxillary artery.

Question 10

What is the nerve supply to temporalis?

Answer 10

The two temporal branches of the mandibular nerve

Question 11

What is the action of temporalis?

Answer 11

The most anterior firbres pass vertically downwards to elevate the mandible

The most posterior fibres pass horizontally forwards, turning down over the root of the zygomatic arch to retract the mandible.