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Head and Neck Anatomy > muscles of mastication > Flashcards

muscles of mastication Flashcards

1
Q

all 4 muscles of mastication are innervated by?

A

V3

anterior division is primarily motor and all named based on muscle

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2
Q

what are the muscles of mastiaction?

A

temporalis, masseter, lateral pterygoid, medial pterygoid

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3
Q

temporalis origin

A

temporal fossa, inferior temporal line

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4
Q

temporalis insertion

A

coronoid process; internal oblique ridge

**NOT attaches to zygomatic arch; courses deep

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5
Q

temporalis innervation

A

V3

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6
Q

temporalis action

A

elevate and retract mandible

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7
Q

masseter origin

A

zygomatic arch

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8
Q

masseter insertion

A

angle of mandible and ramus

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9
Q

masseter innervation

A

V3

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10
Q

masseter action

A

elevate and protract the mandible

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11
Q

lateral pterygoid origin

A

Lateral surface of Lateral pterygoid plate; infratemporal crest

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12
Q

lateral pterygoid insertion

A

TMJ; pterygoid fovea

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13
Q

lateral pterygoid innervation

A

V3

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14
Q

lateral pterygoid action

A

protract and depress mandible; lateral movement; swings to contralateral side

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15
Q

medial pterygoid origin

A

Medial surface of Lateral pterygoid plate

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16
Q

medial pterygoid insertion

A

medial surface of ramus and angle of mandible

17
Q

medial pterygoid innervation

A

V3

18
Q

medial pterygoid action

A

protract and elevate mandible; lateral movement; swings to contralateral side

19
Q

unique about masseter muscle?

A

has two heads

20
Q

masseter and temporalis synergize and antagonize each other how?

A
  • synergize= elevate mandible

* antagonize: temp= retract; mass= protract

21
Q

prime protractors?

A

lateral and medial pterygoid

** mainly lateral pterygoid ***

22
Q

lateral and medial pterygoid give lateral movement how?

A

going to contralateral side

*contract on left side means your mandible swings to the right

Head and Neck Anatomy (46 decks)

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