Neck and Prevertebral Muscles Flashcards Preview

S1 Anatomy > Neck and Prevertebral Muscles > Flashcards

Flashcards in Neck and Prevertebral Muscles Deck (73):
1

what muscles form the boundary of the posterior cervical triangle

trapezius
sternocleidomastoid
platysma

2

sternocleidomastoid
-origin

sternal head
-anterior surface of manubrium
clavicular head
-superior surface of middle 1/3 of clavicle

3

sternocleidomastoid
-insertion

lateral surface of mastoid process
lateral 1/2 of superior nuchal line

4

sternocleidomastoid
-actions

alone
-laterally flexes neck
-rotates head superiorly and to contralateral side
bilaterally
-neck flexion

5

sternocleidomastoid
-innervation

spinal accessory nerve (CN XI)
cervical nerves C2, C3 (may be primarily sensory for proprioceptive information and are from ventral rami)

6

platysma
-origin

fascia and skin over pec major and deltoid

7

platysma
-insertion

inferior border of mandible
skin of lower face

8

platysma
-actions

tenses skin of neck
draws corner of mouth inferiorly
assists in depressing mandible

9

platysma
-innervation

cervical branch of facial nerve (CN VII)

10

what muscles form the floor of the posterior cervical triangle

splenius capatis
levator scapulae
posterior scalene
middle scalene
anterior scalene

11

posterior scalene
-origin

posterior tubercles of transverse processes C4-C6

12

posterior scalene
-insertion

external border of second rib

13

posterior scalene
-actions

flexes neck laterally
elevates 2nd rib during forced inspiration

14

posterior scalene
-innervation

ventral rami of C7, C8

15

middle scalene
-origin

posterior tubercles of transverse process C2-C7

16

middle scalene
-insertion

superior surface of first rib, posterior to groove of subclavian artery

17

middle scalene
-actions

flexes neck laterally
elevates 1st rib during forced inspiration

18

middle scalene
-innervation

ventral rami of C3-C8

19

anterior scalene (hidden behind SCM)
-origin

anterior tubercles of transverse processes C3-C6

20

anterior scalene
-insertion

scalene tubercle of inner border of 1st rib and near groove of subclavian artery

21

anterior scalene
-actions

flexes neck forward and laterally
laterally rotates neck to contralateral side
elevates 1st rib during forced inspiration

22

anterior scalene
-innervation

ventral rami of C4-C6

23

what are the suprahyoid muscles

mylohyoid
geniogyoid
stylohyoid
digastric

24

mylohyoid
-origin

mylohyoid line of mandible

25

mylohyoid
-insertion

midline raphe and body of hyoid bone

26

mylohyoid
-actions

elevates hyoid bone, floor of mouth and tongue during swallowing and speaking

27

mylohyoid
-innervation

nerve to mylohyoid
-branch of inferior alveolar nerve (CN V3)

28

geniohyoid
-origin

inferior mental spine of mandible

29

geniohyoid
-insertion

body of hyoid

30

geniohyoid
-actions

pulls hyoid bone anterosuperiorly, shortening floor of mouth and widening pharynx

31

geniohyoid
-innervation

C1 via hypoglossal nerve (CN XII)

32

stylohyoid
-origin

styloid process of temporal bone

33

stylohyoid
-insertion

body of hyoid

34

stylohyoid
-action

elevates and retracts hyoid bone, elongating floor of mouth

35

stylohyoid
-innervation

cervical branch of facial nerve (CN VII)

36

digastric
-origin

anterior belly
-digastric fossa of mandible
posterior belly
-mastoid notch of temporal bone

37

digastric
-insertion

intermediate tendon to body and greater horn of hyoid bone

38

digastric
-action

depresses mandible
raises hyoid bone and steadies it during swallowing and speaking

39

digastric
-innervation

anterior belly
-nerve to mylohyoid (branch of inferior alveloar nerve (CN V3))
posterior belly
-cervical branch of facial nerve (CN VII)

40

muscles of the prevertebral region

longus colli (longus cervicis)
longus capitis
rectus capitis anterior
rectus capitis lateralis

41

longus colli (longus cervicis)
-origin

bodies of T1-T3
transverse process of C3-C6

42

longus colli (longus cervicis)
-insertion

anterior tubercle of C1
bodies of C2,C3

43

longus colli (longus cervicis)
-action

flexes neck forward
upper fibers laterally flex the neck
lower fibers rotate neck to opposite side

44

longus colli (longus cervicis)
-innervation

ventral rami of C2-C6

45

longus capitis
-origin

anterior tubercles of transverse process of vertebrae C3-C6

46

longus capitis
-insertion

anterior and inferior surface of occipital bone

47

longus capitis
-action

flexes neck and head

48

longus capitis
-innervation

ventral rami of C1-C2

49

rectus capitis anterior
-origin

anterior surface of lateral mass of atlas and transverse process

50

rectus capitis anterior
-insertion

inferior surface of occipital bone, anterior to occipital condyle

51

rectus capitis anterior
-action

flexes head at AO joint?
these small muscles in addition to suboccipital muscles probably act at AA and AO as stabilizers rather than prime movers

52

rectus capitis anterior
-innervation

ventral rami of C1-C2

53

rectus capitis lateralis
-origin

upper surface of the transverse process of atlas

54

rectus capitis lateralis
-insertion

inferior surface of jugular process of occipital bone

55

rectus capitis lateralis
-action

flexes head laterally?
these small muscles in addition to suboccipital muscles probably act at AA and AO as stabilizers rather than prime movers

56

rectus capitis lateralis
-innervation

ventral rami of C1-C2

57

infrahyoid muscles (strap muscles)

sternohyoid
sternothyroid
thyrohyoid
omohyoid

58

sternohyoid
-origin

manubrium of sternum and medial end of clavicle

59

sternohyoid
-insertion

body of hyoid bone

60

sternohyoid
-action

depresses hyoid bone after it has been elevated for swallowing

61

sternohyoid
-innervation

C1-C3 from ansa cervicalis

62

sternothyroid
-origin

posterior surface of manubrium of sternum

63

sternothyroid
-insertion

oblique line of thyroid cartilage

64

sternothyroid
-action

depresses hyoid bone and larynx

65

sternothyroid
-innervation

C2, C3 from ansa cervicalis

66

thyrohyoid
-origin

oblique line of thyroid cartilage

67

thyrohyoid
-insertion

inferior border of body and greater horn of hyoid bone

68

thyrohyoid
-action

depresses hyoid bone
elevates larynx

69

thyrohyoid
-innervation

C1 vya hypoglossal nerve (CN XII)

70

omohyoid
-origin

superior border of scapula near suprascapular notch

71

omohyoid
-insertion

inferior border of hyoid bone

72

omohyoid
-action

depresses, retracts, and steadies hyoid bone

73

omohyoid
-innervation

C1-C3 from ansa cervicalis