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Clinical Anatomy > Head and Neck Muscles > Flashcards

Head and Neck Muscles Flashcards

1
Q

Action of Digastric

A

Depresses mandible against resistance

Elevates and steadies hyoid during swallowing and speaking

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2
Q

Action of Geniohyoid

A

Pulls hyoid anteriorly and superiorly; shortens floor of mouth; widens pharynx

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3
Q

Action of Masseter

A

Elevates mandible, closing jaw; superficial fibers make limited contribution to protusion of mandible

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3
Q

Action of Longus Colli

A

Flexes neck with rotation to opposite side (torsion) if acting unilaterally

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3
Q

Action of Longus Capitis, Rectus Capitis Anterior and Anterior Scalene

A

Head flexion

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4
Q

Action of Rectus Capitis Lateralis

A

Flexion and stability of head

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4
Q

Action of Middle Scalene

A

Lateral flexion of neck, elevates 1st rib during forced inspiration

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4
Q

Action of Mylohyoid

A

Elevates hyoid, floor of mouth, and tongue during speaking and swallowing

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4
Q

Action of Omohyoid

A

Depresses, retracts, and steadies hyoid

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5
Q

Action of Splenius Capitis

A

Ipsilateral flexion of neck and bilateral extension of vertebral column and head

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6
Q

Action of Sternocleidomastoid

A

Lateral flexion of neck and rotates face towards opposite side. Extends neck at atlantooccipital joints, flexes cervical vertebrae so chin approaches manubrium, assists in chin protrusion and pump handle action of deep respiration

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7
Q

Action of Sternohyoid

A

Depresses hyoid after elevation during swallowing

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7
Q

Action of Sternothyroid

A

Depresses hyoid and larynx

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8
Q

Action of Temporalis

A

Elevates mandible, closing jaw; posterior, more horizontal fibers are primary retractors of mandible

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8
Q

Action of Stylohyoid

A

Elevates AND retracts the hyoid, elongating the floor of the mouth

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9
Q

Action of Thyrohyoid

A

Depresses hyoid and elevates larynx

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10
Q

Innervation of Anterior Belly of Digastric

A

Inferior alveolar nerve via Mandibular nerve (V3)

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11
Q

Innervation of Anterior Scalene

A

Spinal nerves C4-C6

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12
Q

Innervation of Geniohyoid

A

CI spinal nerve via hypoglossal nerve (XII)

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13
Q

Innervation of Longus Capitis

A

Anterior rami of C1-C3

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14
Q

Innervation of Mylohyoid

A

Inferior alveolar nerve via Mandibular nerve (V3)

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14
Q

Innervation of Longus Colli

A

Anterior rami of C2-C6

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14
Q

Innervation of Middle Scalene

A

Anterior rami of C4-C6

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15
Q

Innervation of Omohyoid

A

Ansa Cervicalis (C1-C3)

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16
Q

Innervation of Posterior Belly of Digastric

A

Digastric branch of facial nerve (VII)

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17
Q

Innervation of Posterior Scalene

A

Branches of Spinal Nerves C4-C6

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18
Q

Innervation of Rectus Capitis Anterior

A

Branches from loop between C1-C2

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19
Q

Innervation of Rectus Capitis Lateralis

A

Branches from loop between C1-C2

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19
Q

Innervation of Sternocleidomastoid

A

Accessory Nerve (CN XI), C2 and C3 for pain and proprioception

20
Q

Innervation of Sternohyoid

A

Ansa Cervicalis (C1-C3)

21
Q

Innervation of Sternothyroid

A

Ansa Cervicalis (C1-C3)

22
Q

Innervation of Stylohyoid

A

Stylohyoid branch of facial nerve (VII)

23
Q

Innervation of Thyrohyoid

A

C1 via hypoglossal nerve

24
Q

Insertion of Stylohyoid

A

Body of Hyoid

26
Q

Insertion of Anterior Scalene

27
Q

Insertion of Digastric

A

Intermediate tendon to body and greater horn of hyoid

28
Q

Insertion of Geniohyoid

A

Body of Hyoid

29
Q

Insertion of Longus Capitis

A

Anterior tubercles of C3-C6 transverse processes

31
Q

Insertion of Masseter

A

Angle and lateral surface of mandibular rami

31
Q

Insertion of Longus Colli

A

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

32
Q

Insertion of Middle Scalene

A

Superior surface of 1st rib; posterior groove for subclavian artery

34
Q

Insertion of Mylohyoid

A

Mylohyoid raphe and body of hyoid

35
Q

Insertion of Omohyoid

A

Inferior border of Hyoid

36
Q

Insertion of Posterior Scalene

A

External border of 2nd rib

37
Q

Insertion of Rectus Capitis Anterior

A

Anterior surface of lateral mass of atlas

38
Q

Insertion of Rectus Capitis Lateralis

A

Transverse process of atlas

39
Q

Insertion of Splenius Capitis

A

Lateral aspect of mastoid process and lateral 1/3 of superior nuchal line

40
Q

Insertion of Sternocleidomastoid

A

Sternal head: anterior surface of manubrium of sternum Clavicular head: superior surface of medial 1/3 of clavicle

42
Q

Insertion of Sternohyoid

A

Body of Hyoid

44
Q

Insertion of Sternothyroid

A

Oblique line of thyroid cartilage

45
Q

Insertion of Temporalis

A

Tip and medial surface of coronoid process and anterior border of mandibular ramus

46
Q

Insertion of Thyrohyoid

A

Inferior border of body and greater horn of Hyoid

47
Q

Main nerve innervating Temporalis, Masseter, Lateral Pterygoid, Medial Pterygoid

A

Anterior trunk of mandibular nerve (V3)

48
Q

Origin of Anterior Scalene

A

Transverse processes of C4-C6

49
Q

Origin of Digastric

A

Anterior Belly: Digastric fossa of mandible

Posterior Belly: Mastoid notch of temporal bone

51
Q

Origin of Geniohyoid

A

Inferior mental spine of mandible

52
Q

Origin of Longus Capitis

A

Basilar part of occipital bone

54
Q

Origin of Longus Colli

A

Anterior tubercle of C1 vertebra, bodies of C1-C3 and transverse processes of C3-C6 vertebra

56
Q

Origin of Masseter

A

Inferior border and medial surface of maxillary process of zygomatic bone and zygomatic arch

58
Q

Origin of Middle Scalene

A

Posterior tubercles of transverse processes of C4-C6

60
Q

Origin of Mylohyoid

A

Mylohyoid line of mandible

62
Q

Origin of Omohyoid

A

Superior border of scapula near suprascapular notch

63
Q

Origin of Posterior Scalene

A

Posterior tubercles of transverse processes C4-C6

64
Q

Origin of Rectus Capitis Anterior

A

Base of skull, just anterior to occipital condyle

65
Q

Origin of Rectus Capitis Lateralis

A

Jugular process of occipital bone

66
Q

Origin of Splenius Capitis

A

Inferior half of nuchal ligament and spinous processes of C7-T3

67
Q

Origin of Sternocleidomastoid

A

Lateral surface of mastoid process of temporal bone and lateral half of superior nuchal line

68
Q

Origin of Sternohyoid

A

Manubrium of sternum and medial end of clavicle

69
Q

Origin of Sternothyroid

A

Posterior surface of manubrium of sternum

70
Q

Origin of Stylohyoid

A

Styloid process of temporal bone

71
Q

Origin of Temporalis

A

Floor of temporal fossa, deep surface of temporal fascia

72
Q

Origin of Thyrohyoid

A

Oblique line of thyroid cartilage

Clinical Anatomy (7 decks)

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