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Gross Anatomy > Exam 2 - Muscles > Flashcards

Exam 2 - Muscles Flashcards

1
Q

Origin of clavicular part of deltoid muscle

A

lateral 1/3 of clavicle

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2
Q

Insertion of clavicular part of deltoid muscle

A

deltoid tuberosity on humerus

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3
Q

Innervation of deltoid muscle

A

Axillary nerve (c5-c6)

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4
Q

Action of clavicular part of deltoid muscle

A

-Flexion, internal rotation, adduction

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5
Q

Origin of acromion part of deltoid

A

Acromion of scapula

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6
Q

Insertion of acromion part of deltoid

A

deltoid tuberosity on humerus

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7
Q

Action of acromion part of deltoid

A

Abduction

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8
Q

Origin of spinal part of deltoid muscle

A

Spine of Scapula

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9
Q

Insertion of spinal part of deltoid muscle

A

Deltoid tuberosity on humerus

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10
Q

Action of spinal part of deltoid muscle

A

Extension, External rotation, adduction

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11
Q

Muscles of the rotator cuff

A

Supraspinatous, infraspinatous, subscapularis, teres minor

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12
Q

Origin of supraspinatus

A

Supraspinous fossa on scapula

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13
Q

Insertion of supraspinatous

A

Superior facet on greater tubercle of humerus

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14
Q

Innervation of supraspinatous muscle

A

Suprascapular nerve (C4-C6)

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15
Q

Action of supraspinatus muscle

A

Abduction (initiates abduction 15 degrees)

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16
Q

Origin of infraspinatus muscle

A

Infraspinus fossa on the scapula

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17
Q

Insertion of infraspinatus muscle

A

Middle facet on greater tubercle of humerus

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18
Q

Innervation of infraspinatus muscle

A

Suprascapular nerve (C4-C6)

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19
Q

Action of infraspinatus muscle

A

External Rotation

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20
Q

Origin of teres minor

A

Lateral border of scapula

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21
Q

Insertion of teres minor

A

Inferior facet of greater tubercle on humerus

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22
Q

Innervation of teres minor

A

Axillary nerve (C5-C6)

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23
Q

Action of teres minor

A
  • External rotation

- Weak adduction

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24
Q

Origin of subscapularis muscle

A

subscapular fossa

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25
Q

Insertion of subscapularis

A

Lesser tubercle of humerus

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26
Q

Innervation of subscapularis

A

Subscapular nerve (C5-C6)

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27
Q

Action of subscapularis muscle

A

Internal rotation

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28
Q

Origin of teres major

A

Inferior angle of scapula

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29
Q

Insertion of teres major

A

Crest of lesser tubercle of humerus

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30
Q

Innervation of teres major

A

Lower subscapular nerve (C5-C7)

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31
Q

Action of teres major

A

Internal rotation, adduction, extension

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32
Q

Three parts of pectoralis major

A

Clavicular, Sternocostal, Abdominal

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33
Q

Origin of clavicular part of pectoralis major

A

Medial half of clavicle

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34
Q

Insertion of pectoralis major

A

Crest of greater tubercle (humerus)

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35
Q

Innervation of pectoralis major

A

Medial and lateral branches of pectoral nerve (C5-T1)

36
Q

Origin of sternocostal part of pectoralis major

A

Sternum, Costal Cartilages 1-6

37
Q

Insertion of Sternocostal part of pectoralis major

A

Crest of Greater tubercle of humerus

38
Q

Innervation of pectoralis major

A

Medial and lateral branches of Pectoral nerve (C5-T1)

39
Q

Action of pectoralis major

A

Adduction, internal rotation, flexion, help respiration

40
Q

Origin of abdominal part of pectoralis major

A

Abdominal Sheath (outer surface)

41
Q

Insertion of Abdominal part of Pectoralis major

A

Crest of greater tubercle on humerus

42
Q

Innervation of Pectoralis Major

A

Medial and lateral pectoral nerve (C5-T1)

43
Q

Three parts of the deltoid muscle

A

Clavicular, acromial, spinal

44
Q

Origin of subclavius

A

1st rib

44
Q

Insertion of subclavius

A

Inferior border of clavicle

45
Q

Innervation of subclavius

A

Nerve to subclavius (C5-C6)

46
Q

Action of subclavius

A

Steadies clavicle in sternoclavicular joint

47
Q

Origin of pectoralis minor

A

Ribs 3-5

48
Q

Insertion of pectoralis minor

A

Coracoid process on scapula

49
Q

Innervation of pectoralis minor

A

Medial Pectoral Nerve (C8-T1)

50
Q

Action of pectoralis minor

A

Stabilizes scapula

51
Q

Origin of serratus anterior (superior,intermediate,inferior)

A

Ribs 1-9

52
Q

Insertion of serratus anterior

A

Medial border of scapula

53
Q

Innervation of serratus anterior

A

Long thoracic nerve (C5-C7)

54
Q

Action of serratus anterior

A

Protracts

55
Q

Origin of biceps brachii

long head and short head

A

long head - supraglenoid tubercle of scapula

short head - coracoid process of scapula

56
Q

Insertion of biceps brachii

A

Radial tuberosity

57
Q

Innervation of biceps brachii

A

Musculocutaneous n. (C5-C6)

58
Q

Action of biceps brachii

A

Elbow - Flexion (in supination)
-Supination
Shoulder - Flexion

59
Q

Origin of brachialis

A

Humerus (distal half of anterior surface)

60
Q

Insertion of brachialis

A

Ulnar tuberosity

61
Q

Innervation of brachialis

A

Musculocutaneous n. (C5-C6)

62
Q

Action of brachialis

A

Elbow: flexor (in pronation)

**Major flexor

63
Q

Origin of brachioradialis

A

Distal humerus (distal surface) - lateral supracondylar ridge

64
Q

Insertion of brachioradialis

A

Styloid process of radius

65
Q

Innervation of brachioradialis

A

Radial nerve (C5-C6)

66
Q

Action of brachioradialis

A

Elbow - weak flexor (in neutral)

-semipronation

67
Q

Origin of coracobrachialis

A

Coracoid process of scapula

68
Q

Insertion of coracobrachialis

A

Humerus (in line with crest of lesser tubercle)

69
Q

Innervation of coracobrachialis

A

Musculocutaneous n. (C5-C7)

70
Q

Action of coracobrachialis

A

Flexion, adduction, internal rotation

71
Q

Origin of triceps brachii

A

Long head - infraglenoid tubercle of scapula
Medial head - posterior humerus; inferior to radial groove; medial intermuscular septum
Lateral head - posterior humerus; proximal to radial groove; lateral intermuscular septum

72
Q

Insertion of triceps brachii

A

Olecranon of ulna

73
Q

Innervation of triceps brachii

A

Radial nerve (C6-C8)

74
Q

Action of triceps brachii

A 
Elbow joint - extension 
Shoulder joint (*long head)- extension; adduction
75
Q

Origin of anconeus

A

Lateral epicondyle of humerus

76
Q

Insertion of anconeus

A

Olecranon of ulna (radial surface)

77
Q

Innervation of anconeus

A

Radial nerve (C6-C8)

78
Q

Action of anconeus

A

Extends elbow and tightens joint

79
Q

Omohyoid origin

A

Superior border of scapula

80
Q

Insertion of omohyoid

A

Hyoid bone

81
Q

Innervation of omohyoid

A

Ansa cervicalis of cervical plexus (C1-C3)

82
Q

Action of omohyoid

A

Depresses hyoid and larynx (for phonation and swallowing)

83
Q

Posterior compartment of forearm muscles

A

Radialis muscles, Superficial muscles, Deep muscles

84
Q

Radialis muscles of posterior compartment of forearm

A

Brachioradialis, Extensor carpi radialis longus, extensor carpi radialis brevis

Gross Anatomy (11 decks)

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