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?

A

CN5

17
Q

WHERE is LATERAL pterygoid located?

A

infratemporal fossa

18
Q

origin of lateral pterugoid ?

A

sphenoid

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.?

A

CN5

25
Q

bellies of digastric muscles?

A

anterior and posterior

26
Q

where does anterior belly attach?

A

to mandible

27
Q

where does posterior belly attach to?

A

mastoid process of temporal bone

28
Q

how are 2 bellies connected?

A

by intermediate tendon attached to hyoid bones

29
Q

diagastric muscle contracts?

A

pull mandible down and hyoid up

30
Q

nerve supply for anterior belly?

A

CN5

31
Q

nerve supply for posterior belly

A

branch of facial nerve (CN7)

32
Q

trigeminal nerve function?

A

sensory innervation to face

33
Q

mandibular division of Trigeminal nerve function?

A

motor supply to muscles of MAST.