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A&P Lab > Quiz 4: Skull > Flashcards

Quiz 4: Skull Flashcards

1
Q

Where is the Epicranius located?

A

Top half of the head

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2
Q

What are the two area’s of the Epicranius?

A

Frontal belly
Occipital belly

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3
Q

What is the origin of the frontal belly?

A

Skin of eyebrows, root of nose

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4
Q

Where does the frontal belly insert?

A

Epicardial aponeurosis

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5
Q

What action of the frontal belly perform?

A

Raises eyebrows

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6
Q

Where does the occipital belly originate?

A

Occipital and temporal lobes

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7
Q

Where does the occipital belly insert?

A

Epicranial aponeurosis

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8
Q

What action does the occipital belly perform?

A

Pulls scalp

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9
Q

What is the origin of orbicularis oculi?

A

Frontal and maxillary bones
Orbit ligaments

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10
Q

Where does the orbicularis oculi insert?

A

Eyelid tissue

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11
Q

What action does the orbicularis oculi perform?

A

Closes eye, blinking, squinting

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12
Q

What is the origin of the zygomaticus major and minor?

A

Zygomatic bone infraorbital margin of maxilla

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13
Q

Where does the zygomaticus major and minor insert?

A

Skin of the upper lip

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14
Q

What action does the zygomaticus major and minor perform?

A

Raises/furrows upper lip
Opens lip

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15
Q

What is the origin of the risorius?

A

Zygomatic bone

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16
Q

What is the insertion of the risorius?

A

Skin and muscle at corner of the mouth

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17
Q

What is the action of the risorius?

A

Draws corners of the lips laterally

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18
Q

What is the origin of the orbicularis oris?

A

Arises directly from the maxilla and mandible

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19
Q

What is the insertion of the orbicularis oris?

A

Encircles mouth

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20
Q

What is the action of the obicularis oris?

A

Closes and protrudes lips

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21
Q

What is the origin of the buccinator?

A

Deep to masseter

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22
Q

What is the insertion of the buccinator?

A

molar region of the maxilla and mandible

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23
Q

What is the action of the buccinator?

A

Maintains tightness of cheeck

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24
Q

What is the origin of the mentalis?

A

Mandible below incisors

25
Q

What the the insertion of the mentalis?

A

skin of chin

26
Q

What is the action of the mentalis?

A

Protrudes lower lip, wrinkles chin

27
Q

What is the origin of the platysma?

A

fascia covering the clavicle

28
Q

What is the insertion of the platysma?

A

Mandible, cheek skin

29
Q

What is the action of platysma?

A

Pulls down the mandible opening the mouth

30
Q

What is the origin of the depresssor labii inferioris?

A

oblique line at base of jaw

31
Q

What is the insertion of the depressor labii inferioris?

A

Skin of lower lip

32
Q

What is the action of the depressor labii inferioris?

A

Depresses and elevates the lower lip

33
Q

What muscle is the prime mover for creating wrinkles in the forehead?

A

Epicranius

34
Q

What is the prime mover for blinking your eyes

A

obicularis oculi

35
Q

What is the prime mover for puckering your lips?

A

Risorius

36
Q

What is the prime mover of smiling?

A

Zygomaticus major

37
Q

What synovial joint is the tmj?

A

Condylar hinge joint

38
Q

What is the location and articulating surfaces of the TMJ joint?

A

Connects the mandible to the rest of the skill, condylar process of the mandible

39
Q

What are the movements associated with the TMJ joint?

A

Mandibular depression
Elevation
Lateral deviation

40
Q

What is the origin of the masseter?

A

zygomatic arch

41
Q

What is the origin of the temporalis?

A

temporal fossa

42
Q

What is the origin of the digastric?

A

mastoid process of temporal bone

43
Q

What is the origin of the medial pterygoid?

A

Pyramidal process of palatine bone, tuberosity of maxilla

44
Q

What is the origin of the lateral pterygoid?

A

Lateral surface of sphenoid bone

45
Q

What is the insertion of the masseter?

A

angle and lateral manibular surfaces

46
Q

What is the action of the masseter?

A

Lifting of the lower jaw

47
Q

What nerve innervates the masseter?

A

mandibular nerve

48
Q

What is the insertion of the temporalis?

A

apex and medial surface of coronoid process of manidble

49
Q

What is the action of the temporalis?

A

moves mandible up/back, side to side

50
Q

What nerve innervates the temporalis?

A

Mandubular nerve

51
Q

What inserts the digastric?

A

hyoid bone

52
Q

What inserts the medial pterygoid?

A

Ramus
Mandibular angle

53
Q

What inserts the lateral pterygoid?

A

anterior side of the condyle

54
Q

What action does the digastric perform?

A

depresses mandible
elevates hyoid bone

55
Q

What action does the medial pterygoid perform?

A

closing the jaw

56
Q

What action does the lateral pterygoid perform?

A

depresses and protrudes mandible

57
Q

When chewing, what muscles are involved?

A

Masseter - prime chewing muscle
Temporalis - TMJ joint movement
Medial/lateral pterygoid - elevates, depresses maxilla

58
Q

What is a fontanel?

A

Fibrous membranes connecting fetal skull bones

A&P Lab (5 decks)

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