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Muscles O,I&A's > Muscles of Mastication & Buccolabial > Flashcards

Muscles of Mastication & Buccolabial Flashcards

1
Q

Origin of Masseter

A

Zygomatic arch
Zygomatic bone

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2
Q

Insertion of Massester

A

Lateral surface of the ramus and angle of the mandible

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3
Q

Action of Massester

A

Elevates mandible

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4
Q

Origin of Lateral Pterygoid

A

Superior head: Greater wing of sphenoid bone
Inferior head: lateral surface of the lateral pterygoid plate

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5
Q

Insertion of Lateral Pterygoid

A

Superior head: Capsule and articular disk of the TMJ
Inferior head: Neck of mandible

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6
Q

Action of Lateral Pterygoid

A

Protract mandible
Opens mouth
Active in grinding actions of chewing

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7
Q

Origin of Medial Pterygoid

A

Medial surface of the lateral pterygoid plate
Pyramidal process of the palatine bone
Tuberosity of the maxilla

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8
Q

Insertion of Medial Pterygoid

A

Medial surface of the ramus and angle of the mandible

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9
Q

Action of Medial Pterygoid

A

Elevates and protracts the mandible

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10
Q

Origin of Temporalis

A

Temporal fossa and temporal fascia

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11
Q

Insertion of Temporalis

A

Coronoid process of mandible &
Anterior surface of the ramus of the mandible

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12
Q

Action of Temporalis

A

Elevates the mandible
Posterior fibers retract the mandible

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13
Q

Origin of Buccinator

A

Pterygomandibular raphe
Mandible
Maxilla lateral to the molar teeth

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14
Q

Insertion of Buccinator

A

Angle of mouth, & lateral portion of upper and lower lips

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15
Q

Action of Buccinator

A

Pull the corner of the mouth laterally ; presses cheek against teeth

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16
Q

Origin of Depressor Anguli Oris

A

Oblique line of the mandible

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17
Q

Insertion of Depressor Anguli Oris

A

Angle of the mouth

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18
Q

Action of Depressor Anguli Oris

A

Pulls corner of mouth downward

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19
Q

Origin of Depressor Labii Inferioris

A

Anterior surface of mandible

20
Q

Insertion of Depressor Labii Inferioris

A

Skin of lower lip

21
Q

Action of Depressor Labii Inferioris

A

Depresses lower lip

22
Q

Origin of Levator Anguli Oris

A

Canine fossa of the maxilla

23
Q

Insertion of Levator Anguli Oris

A

Angle (corner) of mouth

24
Q

Action of Levator Anguli Oris

A

Elevates the angle of the mouth

25
Q

Origin of Levator Labii Superioris

A

Inferior margin of the orbit

26
Q

Insertion of Levator Labii Superioris

A

Skin of upper lip

27
Q

Action of Levator Labii Superioris

A

Elevates the upper lip

28
Q

Origin of Levator Labii Superioris Alaeque Nasi

A

Frontal process of maxilla

29
Q

Insertion of Levator Labii Superior Alaeque Nasi

A

Ala of the nose and skin of the upper lip

30
Q

Action of Levator Labii Superior Alaeque Nasi

A

Elevates the upper lip and flares the nostril

31
Q

Origin of Mentalis

A

Anterior surface of the mandible near the mental symphysis (midline)

32
Q

Insertion of Mentalis

A

Skin of the chin

33
Q

Action of Mentalis

A

Elevates the lower lip and skin of chin

34
Q

Origin of Orbicularis Oris

A

Skin and fascia of lips and the area surrounding the lips

35
Q

Insertion of Orbicularis Oris

A

Skin and fascia of the lips

36
Q

Action of Orbicularis Oris

A

Purses the lips

37
Q

Origin of Risorius

A

Fascia of the lateral cheek

38
Q

Insertion of Risorius

A

Skin of the angle (corner) of the mouth

39
Q

Action of Risorius

A

Draws the corner of the mouth lateraly

40
Q

Origin of Zygomaticus Major

A

Upper lateral surface of the zygomatic bone

41
Q

Insertion of Zygomaticus Major

A

Skin of the angle of the mouth

42
Q

Action of Zygomaticus Major

A

Elevates and draws the corner of the mouth laterally

43
Q

Origin of Zygomaticus Minor

A

Lower surface of zygomatic bone

44
Q

Insertion of Zygomaticus Minor

A

Lateral part of upper lip

45
Q

Action of Zygomaticus Minor

A

Elevates upper lip

Muscles O,I&A's (27 decks)

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