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Upper Limb Anatomy > Shoulder Muscles > Flashcards

Shoulder Muscles Flashcards

1
Q

Deltoid Origin

A

Anterior: Lateral 1/3 of anterior clavicle
Middle: Anterior acromion
Posterior: Inferior edge of spine of scapula

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2
Q

Deltoid Insertion

A

Deltoid tuberosity of humerus

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3
Q

Deltoid Innervation

A

Axillary Nerve

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4
Q

Deltoid Actions

A

Anterior: Flexes and medially rotates arm
Middle: Abducts arm beyond initial 15 degrees
Posterior: Extends and lateral rotates arm

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5
Q

Deltoid Blood Supply

A

Posterior circumflex humeral artery, deltoid branch of thoraco-Acromial artery

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6
Q

Infraspinatus Origin

A

Infraspinatus fossa of scapula and deep fascia

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7
Q

Infraspinatus Insertion

A

Middle facet of greater tubercle of humerus

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8
Q

Infraspinatus Innervation

A

Suprascapular nerve

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9
Q

Infraspinatus Action

A

Lateral rotation of arm ( with teres minor)

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10
Q

Infraspinatus Blood Supply

A

Suprascapular artery

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11
Q

Latissimus Dorsi Origin

A

Spinous processes of T7-L5 vertebrae, thoracolumbar fossa, iliac crest, last 3 ribs

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12
Q

Latissimus Dorsi Insertion

A

Interubercular sulcus of humerus

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13
Q

Latissimus Dorsi Innervation

A

Thoracodorsal nerve

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14
Q

Latissimus Dorsi Actions

A

Extends, adducts, and medially rotates humerus at shoulder

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15
Q

Latissimus Dorsi Blood Supply

A

Thoracodorsal artery, dorsal perforating branches of 9th, 10th, and 11th posterior intercostal, subcostal and 1st 3 lumbar arteries

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16
Q

Levator Scapulae Origin

A

Posterior tubercles of transverse processes C1-C4

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17
Q

Levator Scapulae Insertion

A

Medial border of scapula from superior angle to spine

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18
Q

Levator Scapula Innervation

A

Ventral Rami of C3-C4 and dorsal scapular nerve

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19
Q

Levator Scapulae Main Action

A

Elevates scapula medially, inferiorly rotates glenoid cavity

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20
Q

Levator Scapulae Blood Supply

A

Dorsal Scapular artery, transverse cervical artery, ascending cervical artery

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21
Q

Pectoralis Major Origin

A

Sternal 1/2 of clavicle, sternum to the 7th rib, cartilages of true ribs, aponeurosis of external oblique muscle

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22
Q

Pectoralis Major Insertion

A

Lateral lip of intertubercular sulcus of humerus

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23
Q

Pectoralis Major Innervation

A

Medial and lateral pectoral nerves

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24
Q

Pectoralis Major Main Actions

A

Flexes and adducts the arm, rotates the arm medially

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25
Q

Pectoralis Major blood supply

A

Pectoral branch of thoracoacromial artery, perforating branches of internal thoracic artery

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26
Q

Pectoralis Minor Origin

A

Outer surface of upper margin of ribs 3-5

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27
Q

Pectoralis Minor Insertion

A

Coracoid process of scapula

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28
Q

Pectoralis Minor Innervation

A

Medial Pectoral nerve

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29
Q

Pectoralis Minor main actions

A

Lowers lateral angle of scapula and protracts scapula

30
Q

Pectoralis Minor Blood Supply

A

Pectoral branch of thoraco-Acromial and intercostal lateral thoracic artery

31
Q

Rhomboid Major Origin

A

Spinous process of T2-T5 vertebrae

32
Q

Rhomboid Major Insertion

A

Medial border of scapula below base of spine of scapula

33
Q

Rhomboid Major Innervation

A

Dorsal Scapular Nerve

34
Q

Rhomboid Major Main Actions

A

Flexes scapula to thoracic wall and retracts and rotates it to depress glenoid cavity

35
Q

Rhomboid Major Blood Supply

A

Dorsal scapular OR deep branch of transverse cervical artery, dorsal perforating branches of the upper 5 or 6 posterior intercostal arteries

36
Q

Rhomboid Minor Origin

A

Ligamentum nuchae, spines of C7 and T1 vertebrae

37
Q

Rhomboid Minor

Insertion

A

Medial border of scapula at spine of scapula

38
Q

Rhomboid Minor

Innervation

A

Dorsal Scapular Nerve

39
Q

Rhomboid Minor

Main Actions

A

Fixes scapula to thoracic wall and retracts and rotates it to depress glenoid cavity

40
Q

Rhomboid Minor

Blood Supply

A

Dorsal Scapular OR deep branch of transverse cervical arter, dorsal perforating branches of the upper 5 or 6 posterior intercostal arteries

41
Q

Serratus Anterior

Origin

A

Lateral surfaces of upper 8-9 ribs

42
Q

Serratus Anterior

Insertion

A

Costal surface of medial border of scapula

43
Q

Serratus anterior

Innervation

A

Long Thoracic Nerve

44
Q

Serratus Anterior

Main Actions

A

Protracts and rotates the scapula and holds it against thoracic wall

45
Q

Serratus Anterior

Blood Supply

A

Lateral Thoracic Artery

46
Q

Subclavius

Origin

A

Upper border of 1st rib and its cartilage

47
Q

Subclavius

Insertion

A

Inferior surface of middle third of clavicle

48
Q

Subclavius

Innervation

A

Nerve to subclavius

49
Q

Subclavius

Main Actions

A

Anchors and depresses clavicle

50
Q

Subclavius

Blood Supply

A

Clavicular branch of thoraco-acromial artery

51
Q

Subscapularis

Origin

A

Subscapular Fossa

52
Q

Subscapularis

Insertion

A

Lesser tubercle of humerus

53
Q

Subscapularis

Innervation

A

Upper and lower subscapular nerves

54
Q

Subscapularis

Main Actions

A

Medially rotates Arm at Shoulder and Adducts it, helps hold humeral head in glenoid cavity

55
Q

Subscapularis

Blood Supply

A

Subscapular Artery, lateral thoracic artery

56
Q

Supraspinatus

Origin

A

Supraspinous fossa of scapula and deep fascia

57
Q

Supraspinatus

Insertion

A

Superior facet of greater tubercle of humerus

58
Q

Supraspinatus

Innervation

A

Suprascapular nerve

59
Q

Supraspinatus

Main Actions

A

Initiates arm abduction, acts with rotator cuff muscles

60
Q

Supraspinatus

Blood Supply

A

Suprascapular artery

61
Q

Teres Major

Origin

A

Posterior surface of inferior angle of scapula

62
Q

Teres Major

Insertion

A

Medial lip of intertubercular sulcus of humerus

63
Q

Teres Major

Innervation

A

Lower subscapular nerve

64
Q

Teres Major

Main Actions

A

Adducts and medially rotates arm

65
Q

Teres Major

Blood Supply

A

Circumflex Scapular artery

66
Q

Teres Minor Origin

A

Upper 2/3 of posterior surface of lateral border of scapula

67
Q

Teres Minor Insertion

A

Inferior facet of greater tubercle of humerus

68
Q

Teres Minor

Innervation

A

Axillary Nerve

69
Q

Teres Minor

Main Actions

A

Laterally rotates arm

70
Q

Teres Minor

Blood Supply

A

Circumflex Scapular Artery

Upper Limb Anatomy (1 decks)

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