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Anatomy and Physiology I > lab five: myology - pectoral area and ventral upper limb > Flashcards

lab five: myology - pectoral area and ventral upper limb Flashcards

1
Q

parallel

A

fascicles are parallel to the longitudinal axis and terminate in flat tendons

ex: sternohyoid

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2
Q

fusiform

A

fascicles are nearly parallel to the longitudinal axis with a belly that narrows toward the tendons

ex: biceps brachii

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3
Q

circular

A

fascicles are arranged concentrically

ex: orbicularis oculi

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4
Q

triangular

A

fascicles converge from a broad origin to a narrow insertion

ex: trapezius

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5
Q

unipennate

A

fascicles attach to one of the two sides of a tendon

ex: extensor digitorum longus

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6
Q

bipennate

A

fascicles attach on both sides of a central tendon

ex: rectus femoris

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7
Q

multipennate

A

fascicles attach obliquely to tendons in various direction

ex: deltoid

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8
Q

muscles crossing shoulder joint

A

pectoralis major, latissimus dorsi, deltoid

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9
Q

action of pectoralis major

A

adducts, flexes and medially rotates arm

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10
Q

origin of pectoralis major

A

clavicle, sternum, and ribs

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11
Q

insertion of pectoralis major

A

humerus (intertubercular sulcus)

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12
Q

action of latissimus dorsi

A

adducts, extends and medially rotates arm

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13
Q

origin of latissimus dorsi

A

scapula, vertebral column, and iliac crest

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14
Q

insertion of latissimus dorsi

A

humerus (intertubercular sulcus)

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15
Q

action of deltoid

A

abducts, flexes, and rotates arm medially and laterally

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16
Q

origin of deltoid

A

clavicle and scapula

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17
Q

insertion of deltoid

A

deltoid tuberosity of humerus

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18
Q

posterior thorax muscles

A

trapezius and levator scapulae

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19
Q

action of trapezius

A

adducts and rotates scapula; elevation and depression of scapula

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20
Q

origin of trapezius

A

superior nuchal line of occipital bone and vertebral column

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21
Q

insertion of trapezius

A

lateral clavicle and scapular spine and acromion

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22
Q

action of levator scapulae

A

elevation of scapula, lateral neck flexion

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23
Q

origin of levator scapulae

A

transverse processes of cervical vertebrae (C1-C4)

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24
Q

insertion of levator scapulae

A

medial border (scapula)

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25
Q

anterior thorax muscle

A

pectoralis minor

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26
Q

action of pectoralis minor

A

stabilizes, abducts and rotates scapula

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27
Q

origin of pectoralis minor

A

ribs 3-5

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28
Q

insertion of pectoralis minor

A

scapula (coracoid process)

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29
Q

shoulder joint muscles (indicates rotator cuff muscles)

A

subscapularis, infraspinatus, supraspinatus, teres minor, teres major, coracobrachialis

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30
Q

action of subscapularis

A

medial rotation of arm, stabilizes humerus head in glenoid cavity

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31
Q

origin of subscapularis

A

subscapular fossa of scapula

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32
Q

insertion of subscapularis

A

lesser tubercle of humerus

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33
Q

action of infraspinatus

A

lateral rotation of arm, stabilizes humerus head in glenoid cavity

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34
Q

origin of infraspinatus

A

infraspinous fossa of scapula

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35
Q

insertion of infraspinatus

A

greater tubercle of humerus

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36
Q

action of supraspinatus

A

abduction of arm, stabilizes humerus head in glenoid cavity

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37
Q

origin of supraspinatus

A

supraspinous fossa of scapula

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38
Q

insertion of supraspinatus

A

greater tubercle of humerus

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39
Q

action of teres minor

A

lateral rotation and adduction of arm, stabilizes humerus head in glenoid cavity

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40
Q

origin of teres minor

A

lateral border of scapula

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41
Q

insertion of teres minor

A

greater tubercle of humerus

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42
Q

action of teres major

A

medial rotation, adductions and extension of arm

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43
Q

origin of teres major

A

inferior angle and lateral border of scapula

44
Q

insertion of teres major

A

intertubercular sulcus of humerus

45
Q

action of coracobrachialis

A

flexion and adduction of arm

46
Q

origin of coracobrachialis

A

coracoid process of scapula

47
Q

insertion of coracobrachialis

A

mid-shaft of humerus

48
Q

anterior arm muscles

A

biceps brachii (long and short head) and brachialis

49
Q

action of biceps brachii

A

supination and flexion of forearm

50
Q

origin of biceps brachii

A

supraglenoid tubercle and coracoid process of scapula

51
Q

insertion of biceps brachii

A

radial tuberosity

52
Q

action of brachialis

A

flexion of forearm

53
Q

origin of brachialis

A

anterior distal shaft of humerus

54
Q

insertion of brachialis

A

ulnar tuberosity and coranoid process of ulna

55
Q

posterior arm muscles

A

triceps brachii (long, lateral, and medial head)

56
Q

action of triceps brachii

A

extension of forearm; stabilizes shoulder joint

57
Q

origin of triceps brachii

A

infraglenoid tubercle (scapula) and proximal posterior shaft of humerus

58
Q

insertion of triceps brachii

A

olecranon process (ulna)

59
Q

anterior forearm muscles

A

brachioradialis

60
Q

action of brachioradialis

A

flexion of forearm; pronation of forearm (when supinated); supination of forearm (when pronated)

61
Q

origin of brachioradialis

A

distal shaft of humerus

62
Q

insertion of brachioradialis

A

styloid process of radius

63
Q

anterior superficial forearm muscles

A

flexor carpi radialis, palmaris longus, flexor carpi ulnaris, pronator teres

64
Q

action of flexor carpi radialis

A

wrist flexion and hand abduction

65
Q

origin of flexor carpi radialis

A

medial epicondyle (humerus)

66
Q

insertion of flexor carpi radialis

A

metacarpals II and III

67
Q

action of palmaris longus

A

wrist flexion (weak)

68
Q

origin of palmaris longus

A

medial epicondyle (humerus)

69
Q

insertion of palmaris longus

A

palmar aponeurosis (sheet-like tendon)

70
Q

action of flexor carpi ulnaris

A

wrist flexion and hand adduction

71
Q

origin of flexor carpi ulnaris

A

medial epicondyle of humerus and olecranon process and posterior border (ulna)

72
Q

insertion of flexor carpi ulnaris

A

pisiform and hamate (carpal bone)

73
Q

action of pronator teres

A

forearm pronation

74
Q

origin of pronator teres

A

medial epicondyle (humerus) and coronoid process of ulna

75
Q

insertion of pronator teres

A

lateral mid-shaft of radius

76
Q

anterior deep forearm muscles

A

flexor pollicis longus and flexor digitorum profundus

77
Q

action of flexor pollicis longus

A

flexion of thumb

78
Q

origin of flexor pollicis longus

A

mid-shaft of radius; coronoid process (ulna)

79
Q

insertion of flexor pollicis longus

A

distal phalanx of I (thumb)

80
Q

action of flexor digitorum profundus

A

flexion of wrist and fingers 2-5

81
Q

origin of flexor digitorum profundus

A

proximal shaft of ulna

82
Q

insertion of flexor digitorum profundus

A

distal phalanges II-V

83
Q

posterior deep forearm muscles

A

abductor pollicis longus, extensor pollicis longus, supinator

84
Q

action of abductor pollicis longus

A

abduction and extension of thumb

85
Q

origin of abductor pollicis longus

A

radius and ulna (both proximal posterior); interosseous membrane

86
Q

insertion of abductor pollicis longus

A

metacarpal I

87
Q

action of extensor pollicis longus

A

extension of thumb

88
Q

origin of extensor pollicis longus

A

ulna (posterior mid-shaft); interosseous membrane

89
Q

insertion of extensor pollicis longus

A

distal phalanx of thumb

90
Q

action of supinator

A

supination of forearm

91
Q

origin of supinator

A

ulna (posterior proximal shaft); lateral epicondyle of humerus

92
Q

insertion of supinator

A

radius (lateral proximal shaft)

93
Q

posterior superficial forearm muscles

A

extensor carpi radialis longus, extensor carpi radialis brevis, extensor digitorum, extensor carpi ulnaris

94
Q

action of extensor carpi radialis longus

A

extension of wrist and abduction of hand

95
Q

origin of extensor carpi radialis longus

A

supracondylar ridge (humerus)

96
Q

insertion of extensor carpi radialis longus

A

metacarpal II

97
Q

action of extensor carpi radialis brevis

A

extension of wrist and abduction of hand

98
Q

origin of extensor carpi radialis brevis

A

lateral epicondyle (humerus)

99
Q

insertion of extensor carpi radialis brevis

A

metacarpal III

100
Q

action of extensor digitorum

A

extension of wrist and fingers 2-5

101
Q

origin of extensor digitorum

A

lateral epicondyle (humerus)

102
Q

insertion of extensor digitorum

A

phalanges II-V

103
Q

action of extensor carpi ulnaris

A

extension of wrist; adduction of wrist

104
Q

origin of extensor carpi ulnaris

A

lateral epicondyle (humerus) and ulna

105
Q

insertion of extensor carpi ulnaris

A

metacarpal V

Anatomy and Physiology I (13 decks)

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