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Occlusion & Fixed Prosthodontics > Muscles of Mastication and Facial Expression > Flashcards

Muscles of Mastication and Facial Expression Flashcards

(40 cards)

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1
Q

What muscle is this?

What is its origin?

What is its insertion?

A

masseter (deep & superficial heads)

Origin: zygomatic process of maxilla and zygmatic arch (S); zygomatic arch (D)

Insertion: ramus of mandible

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2
Q

What muscle is this?

What is its origin?

What is its insertion?

A

temporalis

Origin: temporal fossa on lateral surface of skull

Insertion: coronoid process of mandible; anterior border of ramus

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3
Q

What muscle is this?

What is its origin?

What is its insertion?

A

superior lateral pterygoid

Origin: greater wing of sphenoid; lateral pterygoid plate

Insertion: condyle of mandible; capsule of TMJ

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4
Q

What muscle is this?

What is its origin?

What is its insertion?

A

inferior lateral pterygoid

Origin: lateral pterygoid plate

Insertion: neck of condyle on mandible

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5
Q

What muscle is this?

What is its origin?

What is its insertion?

A

medial pterygoid

Origin: pterygoid fossa; medial surface of lateral pterygoid plate

Insertion: angle of the mandible on medial surface

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6
Q

What two muscles make up the “masseter sling?”

A

masseter and medial pterygoid

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7
Q

Which two muscles are depressors of the palate?

A

palatoglossus

palatopharyngeal

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8
Q

Which muscles are elevators of the palate?

A

tensor veli palatini

levator veli palatini

musculus uvulae

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9
Q

These muscles depress the palate and have NO origins or insertions to bone.

A

palatoglossus

palatopharyngeal

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10
Q

What are the 4 muscles of mastication?

A

masseter

temporalis

inferior and superior lateral pterygoids

medial pterygoid

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11
Q

What muscle is this?

What is its origin?

What is its insertion?

A

buccinator

Origin: alveolar processes of maxillary and mandibular molars; pterygomandibular raphe

Insertion: orbicularis oris

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12
Q

What muscle attaches to the posterior border of the pterygomandibular raphe? The anterior border?

A

superior constrictor

buccinator

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13
Q

Where does the pterygomandibular raphe attach to?

A

hamulus of medial pterygoid plate

mylohyoid line of mandible

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14
Q

What muscle is this?

What is its origin?

What is its insertion?

A

superior constrictor

Origin: medial pterygoid plate; hamulus

Insertion: pterygomandibular raphe; alveolar processes

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15
Q

What muscles make up the suprahyoids?

A

geniohyoid

mylohyoid

digastric

stylohyoid

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16
Q

What muscle is this?

What is its origin?

What is its insertion?

A

geniohyoid

Origin: inferior genial tubercule

Insertion: anterior surface of hyoid bone

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17
Q

What muscle is this?

What is its origin?

What is its insertion?

Study These Flashcards
A

mylohyoid

Origin: last molar root to the mylohyoid line

Insertion: median raphe under tongue; body of hyoid

18
Q

What muscle is this?

What is its origin?

What is its insertion?

Study These Flashcards
A

digastric (anterior and posterior bellies)

Origin: lower border of mandible (anterior); mastoid process (posterior)

Insertion: hyoid bone

19
Q

What muscle is this?

What is its origin?

What is its insertion?

Study These Flashcards
A

stylohyoid

Origin: styloid process

Insertion: body of the hyoid

20
Q

What muscle is this?

What is its origin?

What is its insertion?

Study These Flashcards
A

genioglossus

Origin: inferior mental spine of mandible (genial tubercule)

Insertion: hyoid and tongue

21
Q

Which structure contains the insertions of 8 facial muscles?

22
Q

Which cranial nerve innervates all facial muscles?

23
Q

What muscle is this?

What is its origin?

What is its insertion?

Study These Flashcards
A

orbicularis oris

Origin: fibers of other facial muscles

Insertion: feathers from the angle of mouth into the surrounding skin

24
Q

What muscle is this?

What is its origin?

What is its insertion?

Study These Flashcards
A

zygomaticus major

Origin: zygomatic bone

Insertion: modiolus (orbicularis oris, depressor and levator anguli oris)

25
What muscle is this? What is its origin? What is its insertion?
**zygomaticus minor** **Origin:** zygomatic bone **Insertion:** subcutaneous tissue of upper lip
26
What muscle is this? What is its origin? What is its insertion?
**risorius** **Origin:** fascia of the masseter **Insertion:** modiolus (skin surrounding the mouth)
27
What muscle is this? What is its origin? What is its insertion?
**levator labii superioris alaeque nasi** **Origin:** frontal process of the maxilla **Insertion:** alar cartilage; levator labii superioris
28
What muscle is this? What is its origin? What is its insertion?
**levator labii superioris** **Origin:** zygomatic bone **Insertion:** skin of upper lip
29
What muscle is this? What is its origin? What is its insertion?
**depressor anguli oris** **Origin:** oblique line of the mandible **Insertion:** risorius; orbicularis oris
30
What muscle is this? What is its origin? What is its insertion?
**depressor labii inferioris** **Origin:** oblique line of mandible, between genial tubercule and mental foramen **Insertion:** skin of lower lip
31
What muscle is this? What is its origin? What is its insertion?
**mentalis** **Origin:** incisive fossa of the mandible **Insertion:** soft tissue of lower lip and chin
32
Contraction of the inferior lateral pterygoids and digastric muscle and relaxation of the masster, medial pterygoids and temporalis _____ the mandible.
**depress**
33
Which muscles contract to depress the mandible?
**inferior lateral pterygoids** **digastric**
34
Which muscles relax to depress the mandible?
**masseter** **medial pterygoids** **temporalis**
35
Contraction of the masseter, medial pterygoids, temporalis and superior lateral pterygoids and the relaxation of the inferior lateral pterygoids and digastric muscle _____ the mandible.
**elevate**
36
The contraction of which muscles elevate the mandible?
**masseter** **medial pterygoid** **temporalis** **superior lateral pterygoid**
37
The relaxation of which muscles elevate the mandible?
**inferior lateral pterygoid** **digastric**
38
The contraction of the left inferior lateral pterygoid and relaxation of right inferior lateral pterygoid results in which direction of lateral movement?
**right lateral movement**
39
The contraction of which muscles protrude the mandible?
**inferior lateral pterygoid** **masseter** **medial pterygoid**
40
The contraction of which muscle causes retrusion of the mandible?
**temporalis**

Occlusion & Fixed Prosthodontics (1 decks)

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