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HEAD AND NECK - ANATOMY > 12 - muscles of mastication > Flashcards

12 - muscles of mastication Flashcards

1
Q

4 muscles of mastication?

A

temporalis
masseter
medial pterygoid
lateral pterygoid

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2
Q

shape of the temporalis?

A

fan shaped

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3
Q

2 bony attachments of the temporalis?

A 
temporal fossa (of the temporal bone) 
coronoid process (of mandible)
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4
Q

actions of the temporalis on the mandible?

A

Elevates the mandible, closing the mouth

Retracts the mandible, pulling the jaw posteriorly

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5
Q

2 bony attachments of the masseter?

A

zygomatic arch

coronoid process

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6
Q

action of the masseter m?

A

elevates mandible, closing the mouth

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7
Q

where does lateral pterygoid attach to?

A

lateral surface of pterygoid plate

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8
Q

where does medial pterygoid attach to?

A

medial surface of pterygoid plate

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9
Q

action as a result of 2 lateral pterygoid muscles contracting?

A

protrusion and depression

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10
Q

action as a result of pterygoid muscle contracting with the medial pterygoid of the same side?

A

jaw movements to the same side as the contraction

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11
Q

action as a result of 2 medial pterygoid muscles contracting?

A

elevation and protrusion

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12
Q

2 ways that the mandible is depressed?

A

suprahyoid muscles

gravity

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13
Q

which 3 suprahyoid muscles that depress the mandible?

A

digastric
mylohyoid
geniohyoid

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14
Q

elevation of mandible?

A

masseter
temporalis
medial pterygoid

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15
Q

depression of mandible?

A

mylohyoid
geniohyoid
digastric
stylohyoid

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16
Q

protrusion of mandible?

A

lateral and medial pterygoid

17
Q

retraction of mandible?

A

temporalis

18
Q

lateral deviation?

A

later and medial pterygoid

19
Q

innervation of muscles of mastication?

A

mandibular division of trigeminal n

20
Q

which division of the trigeminal n carries both motor and sensory fibres?

A

mandibular division

HEAD AND NECK - ANATOMY (13 decks)

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