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Anatomy > Muscles of the upper limb - Week 1 > Flashcards

Muscles of the upper limb - Week 1 Flashcards

1
Q

Sternocleidomastoid origin

A

Mastoid process on inferior/posterior temporal bone, occipital bone on posterior skull

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2
Q

Sternocleidomastoid Insertion

A

Manubrium of sternum, clavicle

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3
Q

Sternocleidomastoid innervation

A

Spinal accessory nerve (CN XI)

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4
Q

Sternocleidomastoid Function

A

Unilateral contraction: lateral flexion and rotation of head (causes to face up and away from muscle), Bilateral contraction: extends head at neck and flexes neck to bring chin down towards chest

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5
Q

Omohyoid origin

A

Superior border of scapula near suprascapular notch

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6
Q

Omohyoid insertion

A

Inferior hyoid bone in neck

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7
Q

Omohyoid Innervation

A

Ventral rami of cervical plexus

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8
Q

Omohyoid Function

A

Depresses hyoid bone

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9
Q

Scalenes Origin

A

Ribs 1 and 2

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10
Q

Scalenes Insertion

A

Transverse processes of cervical vertebrae

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11
Q

Scalenes innervation

A

Ventral rami of cervical plexus

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12
Q

Scalenes function

A

Laterally flex neck, elevate ribs to aid inhalation

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13
Q

Scalenes misc

A

3 muscles: anterior/middle/posterior. Phrenic nerve travels over anterior, trunks of brachial plexus emerge between anterior/middle

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14
Q

Pectoralis major origin

A

Clavicle, sternum & costal cartilages

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15
Q

Pectoralis major innervation

A

Lateral and medial pectoral nerves

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16
Q

Pec major function

A

Adducts and medially rotates humerus, can also flex and extend from flexed position

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17
Q

Pec minor origin

A

Ribs 3-5

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18
Q

Pec minor insertion

A

Coracoid process of scapula

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19
Q

Pec minor innervation

A

Medial pectoral nerve

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20
Q

Pec minor function

A

Stabilizes scapula

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21
Q

Serratus anterior origin

A

Lateral surface of ribs 1-8

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22
Q

Serratus anterior insertion

A

Anterior surface of medial border of scapula

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23
Q

Serratus anterior innervation

A

Long thoracic nerve

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24
Q

Serratus anterior function

A

Protracts scapula and stabilizes against ribs, rotates scapula

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25
Q

Deltoid origin

A

Clavicle, acromion, spine of scapula

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26
Q

Deltoid insertion

A

Deltoid tuberosity

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27
Q

Deltoid innervation

A

Axillary nerve

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28
Q

Deltoid function

A

Flexes, abducts, and rotatates arm at shoulder

29
Q

Infraspinatus origin

A

Infraspinous fossa of scapula

30
Q

Infraspinatus insertion

A

Greater tubercle

31
Q

Infraspinatus Innervation

A

Suprascapular nerve

32
Q

Infraspinatus function

A

Laterally rotate arm at shoulder

33
Q

Infraspinatus notes

A

Rotator cuff (SITS), superior landmark of quadrangular space & triangular space

34
Q

Supraspinatus origin

A

Supraspinous fossa of scapula

35
Q

Supraspinatus insertion

A

Greater tubercle

36
Q

Supraspinatus innervation

A

Suprascapular nerve

37
Q

Supraspinatus function

A

Abduct arm at shoulder (initiate abduction)

38
Q

Supraspinatus Notes

A

Rotator cuff (SITS)

39
Q

Teres minor origin

A

Lateral border of scapula

40
Q

Teres minor insertion

A

Greater tubercle

41
Q

Teres minor innervation

A

Axillary nerve

42
Q

Teres minor function

A

Laterally rotate arm at shoulder

43
Q

Teres minor notes

A

Rotator cuff (SITS), inserts alongside infraspinatus

44
Q

Subscapularis origin

A

Subscapular fossa

45
Q

Subscapularis insertion

A

Lesser tubercle

46
Q

Subscapularis innervation

A

Upper and lower subscapular nerves

47
Q

Subscapularis function

A

Medially rotate arm at shoulder, stabilizes arm in glenoid fossa and resists dislocation

48
Q

Teres major origin

A

Inferior angle of scapula

49
Q

Teres major insertion

A

Intertubercular groove

50
Q

Teres major Innervation

A

Lower subscapular nerve

51
Q

Teres major function

A

Adduct and medially rotate arm at shoulder

52
Q

Teres major notes

A

Inferior landmark of quadrangular space & triangular space

53
Q

Biceps brachii origin

A

Coracoid process of scapula (short head), glenoid fossa and joint soft tissue of scapula (long head)

54
Q

Biceps brachii insertion

A

Bicipital tubercle of radius, fascia of forearm

55
Q

Biceps brachii innervation

A

Musculocutaneous nerve

56
Q

Biceps brachii function

A

Supinates and flexes forearm at elbow, stabilizes shoulder

57
Q

Coracobrachialis origin

A

Coracoid process of scapula

58
Q

Coracobrachialis insertion

A

Medial shaft of humerus

59
Q

Coracobrachialis innervation

A

Musculocutaneous nerve

60
Q

Coracobrachialis function

A

Flexes and adducts arm at shoulder

61
Q

Brachialis origin

A

Anterodistal shaft of humerus

62
Q

Brachialis insertion

A

Proximal anterior ulna

63
Q

Brachialis innervation

A

Musculocutaneous nerve

64
Q

Brachialis function

A

Flexes forearm at elbow

65
Q

Triceps brachii origin

A

Infraglenoid tubercle (long head), posterior shaft of humerus (lateral and medial heads)

66
Q

Triceps brachii insertion

A

Olecranon process of ulna, fascia of forearm

67
Q

Triceps brachii innervation

A

Radial nerve

68
Q

Triceps brachii function

A

Extends forearm at elbow, long head resists dislocation

69
Q

Triceps brachii misc

A

Long head forms medial border of quadrangular space, lateral border of triangular space

Anatomy (25 decks)

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