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PHTH 510 > Muscles of the Shoulder > Flashcards

Muscles of the Shoulder Flashcards

1
Q

What is the origin of the trap?

A

Superior nuchal line, occipital protuberance, spinous process of C7-T12

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2
Q

What is the insertion of the trap?

A

the clavicle, acromion and spine of scapula

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3
Q

what innervates the trap?

A

accessory nerve (CN11)

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4
Q

what is the action of the trap?

A

the superior trap elevates the scap, the middle trap retracts the scapula, the inferior trap depresses the scap

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5
Q

what is the origin of the deltoid?

A

inferior spine of the scapula, lateral margins of acromion, anterior border of lateral clavicle

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6
Q

what is the insertion of the deltoid?

A

deltoid tuberosity of the humerus

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7
Q

what innervates the deltoid

A

axillary nerve (C5-C6)

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8
Q

what is the action of the deltoid?

A

anterior delt will flex and medially rotate the arm, middle delt will abduct the arm, the posterior delt with extend and laterally rotate the arm

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9
Q

what is the origin of levator scap?

A

transverse processes of C1-C4 vertebrae

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10
Q

what is the insertion of levator scap?

A

superior angle of scapula

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11
Q

what is the innervation of levator scap?

A

dorsal scapular (C5) and cervical C3,C4 nerves

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12
Q

what is the action of levator scap?

A

elevate the scapula and tilt the glenoid cavity inferiorly by rotating the scapula

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13
Q

what is the origin of rhomboid major

A

spinous process of T2-T5 vertebrae

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14
Q

what is the origin of rhomboid minor

A

spinous process of C7 and T1 vertebrae

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15
Q

what is the insertion of rhomboid minor?

A

medial border of scapula above scapular spine

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16
Q

what is the insertion of rhomboid major?

A

medial border of scapula below scapular spine

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17
Q

what is the action of the rhomboids?

A

retract the scapula and rotate it to depress the glenoid cavity. Also fixes the scapula to the thoracic wall.

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18
Q

what are the superficial muscles of the shoulder?

A

trap, deltoid, levator scap, rhomboids

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19
Q

what are the posterior scap muscles?

A

supraspinatus, infraspinatus, teres minor, teres major, and long head of triceps

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20
Q

what is the origin of the supraspinatus?

A

supraspinatus fossa of the scapula

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21
Q

what is the insertion of the supraspinatus?

A

greater tubercle of the humerus

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22
Q

what innervates the supraspinatus

A

the suprascapular nerve (C5,C6)

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23
Q

what is the main action of the supraspinatus?

A

abduct the arm

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24
Q

what is the origin of infraspinatus?

A

the infraspinatus fossa of the scapula

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25
Q

what is the insertion of the infraspinatus

A

the greater tubercle of the humerus

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26
Q

what is the innervation of infraspinatus

A

the suprascapular nerve (C5,C6)

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27
Q

what is the action of the infraspinatus?

A

externally rotate the arm

28
Q

what is the origin of teres minor?

A

the lateral border of the scapula

29
Q

what is the insertion of teres minor?

A

the greater tubercle of the humerus

30
Q

what is the innervation of teres minor?

A

the axillary nerve (C5,C6)

31
Q

what is the action of teres minor?

A

externally rotate the arm

32
Q

what muscles make up the rotator cuff?

A

supraspinatus, infraspinatus, teres minor, subscapularis

33
Q

what is the origin of teres major

A

the inferior angle of the scapula

34
Q

what is the insertion of the teres major

A

intertubercular groove of humerus

35
Q

what is the innervation of the teres major?

A

lower subscapular nerve (C5,C6)

36
Q

what is the action of teres major?

A

extension, adduction, and internal rotation of the arm

37
Q

what is the origin of the long head of the triceps?

A

infraglenoid tubercle on scapula

38
Q

what is the insertion of the long head of the triceps

A

olecranon of the ulna

39
Q

what is the innervation of the long head of triceps

A

radial nerve (C6-C8)

40
Q

what is the action of the long head of triceps?

A

extension of the elbow and arm, adduction of the shoulder

41
Q

what is the origin of the clavicular head of the pec major?

A

the anterior surface of the clavicle

42
Q

what is the origin of the sternocostal head of the pec major

A

anterior surface of sternum, first 7 costal cartilages

43
Q

what is the insertion of the pec major?

A

the lateral lip of intertubecular sulcus of humerus

44
Q

what is the innervation of the pec major?

A

the clavicular head is innervated by the medial and lateral pectoral nerve (C5,C6) and the sternocostal head is innervated by C7 and T1 spinal nerves

45
Q

what is the action of pec major?

A

flexion, add, and IR of the arm

46
Q

What is the origin of subclavius

A

the first rib and its costal cartilage

47
Q

what is the insertion of subclavius

A

middle 1/3 of clavicle

48
Q

what is the innervation of the subclavius

A

nerve to subclavius (C5, C6)

49
Q

what is the action of the subclavius

A

depress the clavicle down and forward

50
Q

what is the origin of pec minor

A

ribs 3-5

51
Q

what is the insertion of pec minor

A

coracoid process of scapula

52
Q

what is the innervation of pec minor

A

medial pectoral nerve (C8-T1)

53
Q

what is the action of pec minor

A

elevates the ribs and draws the scapula down and medially

54
Q

what is the origin of serratus anterior

A

1-9 ribs

55
Q

what is the insertion of serratus anterior

A

the costal surface of medial border of scapula

56
Q

what is the innervation of the serratus anterior

A

long thoracic nerve (C5-C7)

57
Q

what is the action of serratus anterior?

A

protraction and retraction of the scapula

58
Q

what is the origin of subscapularis

A

subscapular fossa

59
Q

what is the insertion of subscapularis

A

lesser tubercle of humerus

60
Q

what is the innervation of subscapularis

A

upper and lower subscapular nerves (C5-C6)

61
Q

what is the action of subscapularis

A

medially rotate and adduct arm

62
Q

what is the origin of latissimus dorsi

A

spinous process of T7-L1 thoracolumbar fascia, iliac crest, and inferior 3 or 4 ribs

63
Q

what is the insertion of latissimus dorsi

A

intertubecular groove of humerus and inferior angle of scapula

64
Q

what is the innervation of latissimus dorsi

A

thoracodorsal nerve (C6-C8)

65
Q

what is the action of the latissimus dorsi

A

adduct, extend, and internally rotate humerus

PHTH 510 (7 decks)

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