mastication Flashcards

1
Q

what are the muscles of mastication?

A

temporalis.
masseter
medial pterygoid
lateral pterygoid

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2
Q

temporomandibular joint?

A

joint between mandible and temporal bone of cranium

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3
Q

quadrilateral masseter origin?

A

zygomatic arch

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4
Q

where does masseter insert?

A

lateral surface of mandible

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5
Q

masseter function?

A

elevate mandible

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6
Q

nerve supply for masseter?

A

mandibular division of trigeminal nerve (CN5)

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7
Q

Origin of Temporalis?

A

Frontal
parietal
temporal
sphenoid

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8
Q

where does temporalis insert?

A

coronoid process of mandible

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9
Q

how does temporalis elevate mandible?

A

vertical fibres

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10
Q

what temporalis fibres pull the mandible back

A

horizontal fibres

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11
Q

nerve supply for Temporalis?

A

mandibular division of trigeminal nerve

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12
Q

where is MEDIAL pterygoid muscle located?

A

medial to ramus

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13
Q

origin of medial pterygoid?

A

maxilla and sphenoid bone( lateral pterygoid plate)

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14
Q

where does medial pterygoid insert?

A

medial of ramus

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15
Q

function of medial pterygoid?

A

elevate mandible and side to side movement

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16
Q

nerve supply for medial pterygoid?

17
Q

WHERE is LATERAL pterygoid located?

A

infratemporal fossa

18
Q

origin of lateral pterugoid ?

19
Q

what heads does lateral pterygoid have?

A

superior and inferior

20
Q

where does superior head insert?

A

articular disk of TMJ

21
Q

what does superior head control?

A

disk position when mouth closing

22
Q

where does inferior head insert?

A

condiylar process of mandible

23
Q

what does inferior head control?

A

translate mandible head anteriorly when opening

AND for side to side grinding

24
Q

nerve supply of lateral ptery.?

25
bellies of digastric muscles?
anterior and posterior
26
where does anterior belly attach?
to mandible
27
where does posterior belly attach to?
mastoid process of temporal bone
28
how are 2 bellies connected?
by intermediate tendon attached to hyoid bones
29
diagastric muscle contracts?
pull mandible down and hyoid up
30
nerve supply for anterior belly?
CN5
31
nerve supply for posterior belly
branch of facial nerve (CN7)
32
trigeminal nerve function?
sensory innervation to face
33
mandibular division of Trigeminal nerve function?
motor supply to muscles of MAST.