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Oral Biology > Muscles Of Mastication > Flashcards

Muscles Of Mastication Flashcards

0
Q

What is the insertion of the masseter?

A

Superficial head: angle of the mandible, inferior and lateral parts of the mandibular ramus

Deep head: superolateral mandibular ramus and coronoid process

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1
Q

What is the origin of the masseter muscle?

A

Superficial head : inferior border of the anterior 2/3 of the zygomatic arch

Deep head: medial border of the zygomatic arch and inferior border of the posterior 1/3 of the zygomatic arch

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2
Q

What is the action of the masseter muscle?

A

Elevate the mandible

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3
Q

What is the nerve innervation of the masseter?

A

Masseteric nerve of the mandibular anterior division of the trigeminal nerve

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4
Q

What is the origin of the temporalis muscle?

A

Entirely from the temporal fossa- along the interior temporal line including temporal fascia

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5
Q

What is the insertion of the temporalis muscle?

A

Coronoid process of the mandible

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6
Q

What action does the temporalis muscle do?

A

Elevates the mandible and the posterior fibers retrude the mandible

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7
Q

What innervates the temporalis muscle ?

A

Anterior and posterior deep temporal branches of the mandibular anterior division of the trigeminal nerve

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8
Q

What is the origin of the medial pterygoid muscle?

A

Superficial head: maxillary tuberosity and the pyramidal process of the palatine bone

Deep head: medial surface of the lateral pterygoid plate of the sphenoid bone

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9
Q

What is the insertion of the medial pterygoid muscle ?

A

Superficial head: medial surface of the ramus of the mandible and angle of the mandible

Deep head: medial surface of the ramus of the mandible and angle of the mandible

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10
Q

What is the action of the medial pterygoid muscle?

A

Elevates mandible, lateral extrusion of the mandible and protrudes mandible

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11
Q

What nerve innervates the medial pterygoid muscle?

A

The medial pterygoid branch of the anterior mandibular division of the trigeminal nerve

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12
Q

What is the origin of the lateral pterygoid muscles?

A

Superior head: inferior surface of the greater wing of the sphenoid bone

Inferior head: lateral surface of the lateral pterygoid plate

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13
Q

What is the insertion of the lateral pterygoid muscle?

A

Superior head: articulate disc and capsule of TMJ

Inferior head: pterygoid fovea on the neck of the condyle of the mandible

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14
Q

What is the action of the lateral pterygoid muscle?

A

Depress the mandible, protrude the mandible and lateral extrusion of the mandible

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15
Q

What is the innervation of the lateral pterygoid muscle?

A

Lateral pterygoid branch of the anterior mandibular division of the trigeminal nerve

Oral Biology (7 decks)

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