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Anatomy > O & I: Face and Neck Muscles > Flashcards

O & I: Face and Neck Muscles Flashcards

1
Q

Origin: Risorius

A

Parotid fascia & Buccal skin (highly variable)

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2
Q

Insertion: Risoruis

A

Angle of mouth (modiolus)

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3
Q

Action: Risorius

A

part of dilator of mouth; depresses labial commissure bilaterally to frown (sadness)

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4
Q

Origin: Zygomaticus Major

A

Lateral aspect of zygomatic bone

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5
Q

Insertion: Zygomaticus Major

A

Angle of mouth (modiolus)

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6
Q

Action: Zygomaticus Major

A

part of dilators of mouth; elevate labial commissure —

bilaterally to smile (happiness)

Unilaterally to sneer (disdain)

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7
Q

Origin: Mentalis

A

body of mandible (anterior to roots of inferior incisors)

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8
Q

Insertion: Mentalis

A

skin of chin (mentolabial sulcus)

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9
Q

Action: Mentalis

A

elevates and protrudes lower lip; elevates skin of chin (showing doubt)

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10
Q

Origin: Depressor labii inferioris

A

platysma and anterolateral body of mandible

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11
Q

Insertion: Depressor Labii Inferioris

A

skin of lower lip

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12
Q

Action: Depressor Labii Inferioris

A

part of dilators of mouth; retracts (depresses) and/or everts lower lip (pouting, sadness)

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13
Q

Origin: Depressor Anguli Oris

A

infra-orbital maxilla (canine fossa)

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14
Q

Insertion: Depressor Anguli Oris

A

Angle of mouth (modiolus)

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15
Q

Action: Depressor Anguli Oris

A

Part of dilators of mouth; widens oral fissure, as when grinning or grimacing

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16
Q

Origin: Buccinator

A

mandible, alveolar process of maxilla, and alveolar part of mandible, pterygomandibular raphe

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17
Q

Insertion: Buccinator

A

angle of mouth (modiolus); orbicularis oris

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18
Q

Action: Buccinator

A

presses cheek against molar teeth; works /c tongue to keep food btw occlusal surfaces and out of oral vestibule; resists distention (when blowing)

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19
Q

Origin: Temporalis

A

triangular muscle /c broad attachment to floor of temporal fossa & deep surface of temporal fascia

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20
Q

Insertion: Temporalis

A

narrow attachment to tip and medial surface of coronoid process and anterior border of ramps of mandible

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21
Q

Innervation: Temporalis

A

anterior trunk of mandibular nerve (CN V3) via deep temporal branches

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22
Q

Action: Temporalis

A

elevates mandible, closing jaws; posterior, more horizontal fibers are primary retractors of mandible

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23
Q

Origin: Sternohyoid

A

manubrium of sternum

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24
Q

Insertion: Sternohyoid

A

hyoid bone

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25
Q

Innervation: Sternohyoid

A

ansa cervicali from cervical plexus (C1-C3)

26
Q

Action: Sternohyoid

A

fixes or depresses hyoid bone

27
Q

Origin: Omohyoid

A

scapula

28
Q

Insertion: omohyoid

A

hyoid bone

29
Q

Innervation: Omohyoid

A

ansa cervicali from cervical plexus (C1-C3)

30
Q

Action: Omohyoid

A

fixes or depresses hyoid bone

31
Q

Origin: Thyrohyoid

A

Thyroid cartilage

32
Q

Insertion: Thyrohyoid

A

hyoid bone

33
Q

Innervation: Thyrohyoid

A

C1 (via hypoglossal n. — CN XII)

34
Q

Action: Thyrohyoid

A

fixes or depresses hyoid bone

35
Q

Origin: Sternothyorid

A

manubrium of sternum

36
Q

Insertion: Sternothyroid

A

Thyroid cartilage

37
Q

Innervation: Sternothyroid

A

ansa cervicali from cervical plexus (C1-C3)

38
Q

Action: Sternothyroid

A

fixes or depresses hyoid bone

39
Q

Origin: Digastric

A

base of cranium

40
Q

Insertion: Digastric

A

Hyoid bone

41
Q

Innervation: Digastric

A

facial and mandibular nerves

42
Q

Action: Digastric

A

depresses mandible against resistance when infra hyoid muscles fix to depress hyoid bone

43
Q

Origin: Mylohyoid

A

medial body of mandible

44
Q

Insertion: Mylohyoid

A

hyoid bone

45
Q

Innervation: Mylohyoid

A

Mandibular nerve (CN V3)

46
Q

Action: Mylohyoid

A

depresses mandible against resistance when infra hyoid muscles fix to depress hyoid bone

47
Q

Origin: Masseter

A

Quadrate muscle attaching to inferior border and medial surface of maxillary process of zygomatic bone and the zygomatic arch

48
Q

Insertion: Masseter

A

Angle and lateral surface of ramps of mandible

49
Q

Innervation: Masseter

A

Anterior trunk of mandibular nerve (CN V3) via masseteric nerve

50
Q

Action: Masseter

A

elevates mandible, closing jaws; superficial fibers make limited contribution to protrusion of mandible

51
Q

Origin: Longus Capitis

A

Basilar part of occipital bone

52
Q

Insertion: Longus Capitis

A

Anterior tubercles of C3-C6 transverse processes

53
Q

Innervation: Longus Capitis

A

Anterior rami of C1-C3 spinal nerves

54
Q

Action: Longus capitis

A

flex head

55
Q

Origin: Longus Colli

A

Anterior tubercle of C1 vertebra (Atlas); bodies of C1 - C3 and transverse processes of C3 - C6 vertebrae

56
Q

Insertion: Longus Colli

A

Bodies of C5 - T3 vertebrae; transverse processes of C3-C5 vertebrae

57
Q

Innervation: Longus Colli

A

anterior rami of C2-C6 spinal nerves

58
Q

Action: Longus Colli

A

flexes neck /c rotation (torsion) to opposite side if acting unilaterally

59
Q

Origin: Geniohyoid

A

inferior mental spine of mandible

60
Q

Insertion: Geniohyoid

A

body of hyoid

61
Q

Innervation: Geniohyoid

A

C1 via hypoglossal nerve (CN XII)

62
Q

Action: Geniohyoid

A

Pulls hyoid anterosuperiorly; shortens floor of mouth; widens pharynx

Anatomy (25 decks)

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