Muscles of mastication Flashcards by Cassidy Webber | Brainscape

Q

Origin and insertion of temporalis?

A

O - temporal fossa of skull

I - coronoid process of mandible

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Q

Origin and insertion of masseter?

A

O - zygomatic arch

I - lateral ramus + angle of mandible

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Q

Origin and insertion of medial pterygoid?

A

O - lateral pterygoid plate (sphenoid)

I - medial ramus of mandible

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Q

Origin and insertion of lateral pterygoid?

A

O - lateral pterygoid plate (sphenoid)

I - neck of mandible + TMJ capsule and disc

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Q

Actions of temporalis?

A

Bilateral - elevates and retracts mandible

Unilateral - ipsilateral lateral deviation

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Q

Actions of masseter?

A

Bilateral - elevates and protrudes mandible

Unilateral - ipsilateral lateral deviation

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Q

Actions of medial pterygoid?

A

Bilateral - elevates and protrudes mandible

Unilateral - contralateral lateral deviation

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Q

Actions of lateral pterygoid?

A

Bilateral - protrude mandible and intra-articular disc

Unilateral - contralateral lateral deviation

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Q

Innervation of all mastication muscles?

A

Mandibular division of trigeminal nerve

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