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ANAT LP2 > Musculature > Flashcards

Musculature Flashcards

1
Q

Platysma origin

A

fascia of superior portions of pectoralis major and deltoid

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2
Q

Platysma insertion

A

1) inferior mandible at symphysis
2) skin and fascia of the lower parts of the face

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3
Q

Platysma action

A

1) wrinkles the skin of the neck and upper chest
2) depresses the corners of the mouth

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4
Q

Sternocleidomastoid origin

(pl. sternocleidomastoideus)

A

1) medial head: manubrium of the sternum
2) lateral head: middle 1/3 of the clavicle

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5
Q

Sternocleidomastoid insertion

A

mastoid process of temporal bone

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6
Q

Sternocleidomastoid action

A

1) bilateral: flexes the neck (anteriorly), elevates sternum during forced inspiration
2) unilateral: contralateral rotation of the head, ipsilateral flexion of the neck

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7
Q

Digastric attachments

(pl. digastricus)

A

1) anterior belly: digastric fossa of internal mandible
2) posterior belly: mastoid process of temporal bone
- both bellies meet and attach at the lateral aspect of the body of the hyoid bone by a pulley tendon

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8
Q

Digastric action

A

1) opens mouth by depressing mandible
2) elevates hyoid bone

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9
Q

Mylohyoid (pl. mylohyoideus)

origin

A

Inner surface of mandible

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10
Q

Mylohyoid (pl. mylohyoideus)

insertion

A

1) body of hyoid
2) along midline at mylohyoid raphe

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11
Q

Mylohyoid (pl. mylohyoideus)

action

A

1) elevates the hyoid bone
2) raises floor of mouth (for swallowing)

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12
Q

Stylohyoid (stylohyoideus)

origin

A

Styloid process of temporal bone

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13
Q

Stylohyoid (stylohyoideus)

insertion

A

lateral margin of hyoid (near greater horn)

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14
Q

Stylohyoid (stylohyoideus)

action

A

pulls the hyoid superiorly and posteriorly during swallowing

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15
Q

Sternohyoid (sternohyoideus)

Origin

A

1) manubrium of sternum
2) medial end of clavicle

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16
Q

Sternohyoid (sternohyoideus)

insertion

A

body of hyoid bone

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17
Q

Sternohyoid (sternohyoideus)

action

A

Depresses hyoid bone

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18
Q

Sternothyroid (sternothyroideus)

origin

A

Manubrium of sternum

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19
Q

Sternothyroid (sternothyroideus)

insertion

A

thyroid cartilage of larynx

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20
Q

Sternothyroid (sternothyroideus)

action

A

depresses thyroid cartilage

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21
Q

Thyrohyoid (thyrohyoideus)

origin

A

Thyroid cartilage of larynx

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22
Q

Thyrohyoid (thyrohyoideus)

insertion

A

greater horn of hyoid bone

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23
Q

Thyrohyoid (thyrohyoideus)

action

A

1) elevates thyroid cartilage
2) depresses hyoid bone

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24
Q

Omohyoid (omohyoideus)

origin

A

Superior border of scapula

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25
Q

Omohyoid (omohyoideus)

insertion

A

body of hyoid bone, lateral to the insertion of sternohyoid

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26
Q

Omohyoid (omohyoideus)

action

A

depresses hyoid bone

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27
Q

Frontalis origin

A

Epicranial aponeurosis

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28
Q

Frontalis insertion

A

skin above the eyebrows

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29
Q

Frontalis action

A

1) elevates the eyebrows
2) produces horizontal wrinkles the skin of the forehead

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30
Q

Masseter origin

A

1) superficial portion: zygomatic process of maxilla
2) deep portion: zygomatic arch

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31
Q

Masseter insertion

A

superficial portion: angle of ramus of mandible

deep portion: upper portion of ramus and coronoid process of mandible

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32
Q

Masseter action

A

close the jaw by elevating the mandible

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33
Q

Temporalis origin

A

Temporal fossa of skull

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34
Q

Temporalis insertion

A

coronoid process and ramus of mandible

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35
Q

Temporalis action

A

closes the jaw by elevating the mandible

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36
Q

Buccinator origin

A

1) alveolar process of maxilla and mandible
2) pterygomandibular raphe

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37
Q

Buccinator insertion

A

fibers of orbicularis or is at the lateral aspect of the mouth

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38
Q

Buccinator action

A

compresses the cheek, to hold food between the cheek and teeth

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39
Q

Orbicularis Oris origin

A

Very complex; maxilla and mandible, in roughly 4 quadrants

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40
Q

Orbicularis Oris insertion

A

skin around the lips

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41
Q

Orbicularis Oris action

A

constricts the opening of the mouth (puckers lips)

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42
Q

Orbicularis oculi origin

A

medial portion of the orbit

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43
Q

Orbicularis oculi insertion

A

skin of the eyelid

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44
Q

Orbicularis oculi action

A

1) tightly closes eyelids (squint)
2) compresses lacrimal (tear) sac

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45
Q

Levator palpebrae superioris origin

A

Sphenoid bone

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46
Q

Levator palpebrae superioris

insertion

A

tarsal plate of upper eyelid

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47
Q

Levator palpebrae superioris

action

A

retracts and elevates eyelid (open the eye)

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48
Q

Zygomaticus major

origin

A

antero-lateral aspect of zygomatic bone

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49
Q

Zygomaticus major

insertion

A

connective tissue of the angle of the mouth

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50
Q

Zygomaticus major

action

A

draws the angle of the mouth upward and laterally (sincere smile)

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51
Q

Zygomaticus minor

Origin

A

Anterior-medial aspect of zygomatic bone

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52
Q

Zygomaticus minor

insertion

A

skin of the upper lip

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53
Q

Zygomaticus minor

action

A

elevates upper lip

54
Q

Levator labii superioris

origin

A

medial infraorbital margin

55
Q

Levator labii superioris

insertion

A

skin and muscle of the upper lip

56
Q

Levator labii superioris

action

A

elevates the upper lip (sneer)

57
Q

Levator labii superioris alaeque nasi

origin

A

medial maxilla

58
Q

Levator labii superioris alaeque nasi

insertion

A

nostril and upper lip

59
Q

Levator labii superioris alaeque nasi

action

A

1) dilates nostril
2) elevates upper lip and wing of the nose (snarl)

60
Q

Risorius origin

A

fascia over parotid salivary gland

61
Q

Risorius insertion

A

connective tissue of the angle of the mouth

62
Q

Risorius action

A

draws angle of mouth laterally (insincere smile)

63
Q

Mentalis origin

A

anterior mandible

64
Q

Mentalis insertion

A

skin of chin

65
Q

Mentalis action

A

1) elevates and wrinkles the skin of the chin
2) protrudes the lower lip (pout)

66
Q

Depressor anguli oris

origin

A

tubercle of mandible

67
Q

Depressor anguli oris

insertion

A

connective tissue of the angle of the mouth

68
Q

Depressor anguli oris

action

A

depresses the angle of the mouth (sad face)

69
Q

Depressor labii inferioris

origin

A

oblique line of mandible

70
Q

Depressor labii inferioris

insertion

A

1) skin of the lower lip
2) fibers of orbicularis oris

71
Q

Depressor labii inferioris

action

A

depesses lower lip

72
Q

Nasalis origin

A

1) transverse portion: maxilla lateral to the nose
2) alar portion: maxilla over the lateral incisor

73
Q

Nasalis insertion

A

1) transverse portion: dorsum of the nose
2) alar cartilage of the nose

74
Q

Nasalis action

A

1) transverse portion: compresses the nostril
2) alar portion: dilates the nostril

75
Q

Corrugator supercilii

origin

A

superciliary arch (brow ridge) of the frontal bone

76
Q

Corrugator supercilii

insertion

A

skin of forehead near eyebrow

77
Q

Corrugator supercilii

action

A

draws eyebrow medially and downward, forming vertical wrinkles in the skin (frown)

78
Q

Procerus origin

A

fascia over the lower half of the nasal bone

79
Q

Procerus insertion

A

skin of the forehead, between the eyebrows

80
Q

Procerus action

A

depresses the skin between the eyebrows, forming horizontal wrinkles (frown)

81
Q

Superior rectus

origin

A

annular tendon at the apex of the orbit

82
Q

Superior rectus

insertion

A

superior aspect of sclera, posterior to the corneal limbus

83
Q

Superior rectus

action

A

elevates the eyeball

84
Q

Inferior rectus

origin

A

annular tendon at the apex of the orbit

85
Q

Inferior rectus

insertion

A

inferior aspect of sclera, posterior to corneal limbus

86
Q

Inferior rectus

action

A

depresses the eyeball

87
Q

Lateral rectus

origin

A

annular tendon at the apex of the orbit

88
Q

Lateral rectus

insertion

A

lateral aspect of sclera, posterior to corneal limbus

89
Q

Lateral rectus

action

A

abducts the eyeball

90
Q

Medial rectus

origin

A

annular tendon at the apex of the orbit

91
Q

Medial rectus

insertion

A

medial aspect of sclera, posterior to corneal limbus

92
Q

Medial rectus

action

A

adducts the eyeball

93
Q

Superior oblique

origin

A

annular tendon at the apex of the orbit

94
Q

Superior oblique

insertion

A

lateral posterior quadrant of the eyeball

95
Q

Superior oblique

action

A

1) internal rotation of the eye about the optic axis (intorsion)
2) depresses the eyeball
3) abducts the eyeball

96
Q

Inferior oblique

origin

A

orbital surface of the maxilla, lateral to the lacrimal groove

97
Q

Inferior oblique

insertion

A

lateral aspect of the eyeball, deep to the lateral rectus

98
Q

Inferior oblique

Action

A

1) external rotation of the eye about the optic
2) elevates the eyeball
3) abducts the eyeball

99
Q
100
Q
A

Sternocleidomastoid (sternocleidomastoideus)

101
Q
A

Digastric (digastricus)

102
Q
A

Mylohyoid (mylohyoideus)

103
Q
A

Stylohyoid (stylohyoideus)

104
Q
A

Sternohyoid (sternohyoideus)

105
Q
A

Sternothyroid (sternothyroideus)

106
Q
A

Thyrohyoid (thyrohyoideus)

107
Q
A

Omohyoid (omohyoideus)

108
Q
109
Q
110
Q
A

Temporalis

111
Q
A

Buccinator

112
Q
A

Orbicularis oris

113
Q
A

Orbicularis oculi

114
Q
A

Levator palpebrae superioris

115
Q
A

Zygomaticus major

116
Q
A

Zygomaticus minor

117
Q
A

Levator labii superioris

118
Q
A

Levator labii superioris alaeque nasi

119
Q
120
Q
121
Q
A

Depressor anguli oris

122
Q
A

Depressor labii inferioris

123
Q
124
Q
A

Corrugator supercilii

125
Q
126
Q
A

Superior rectus

127
Q
A

Inferior rectus

128
Q
A

Lateral rectus

129
Q
A

Medial rectus

130
Q
A

Superior oblique

131
Q
A

Inferior oblique

ANAT LP2 (7 decks)

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