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First Semester: Gross Anatomy 1 > Week 2: Muscles of the Thoracic Limb Cont. (Origins, Insertions, and Actions) > Flashcards

Week 2: Muscles of the Thoracic Limb Cont. (Origins, Insertions, and Actions) Flashcards

1
Q

Teres minor origin (2)

A

Infraglenoid tubercle of the scapula

distal caudal border of the scapula

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2
Q

Teres minor insertion

A

Teres minor tuberosity of the humerus

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3
Q

Teres minor action (3)

A

Laterally stabilizes shoulder
Laterally rotates shoulder
Assists other muscles to flex shoulder

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4
Q

Supraspinatus origin

A

supraspinatus fossa of the scapula

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5
Q

Supraspinatus insertion

A

greater tubercle of the humerus (thick tendon)

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6
Q

Supraspinatus action (2)

A

Laterally stabilizes shoulder

Extends shoulder

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7
Q

Subscapularis origin

A

Subscapular fossa of the scapula

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8
Q

Subscapularis insertion

A

Lesser tubercle of the humerus

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9
Q

Subscapularis action (3)

A

Medially stabilizes shoulder
Adduct shoulder
Extend shoulder

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10
Q

Teres major origin (2)

A

Caudal angle and caudal border of the scapula

Subscapularis muscle

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11
Q

Teres major insertion

A

Teres major tuberosity of the humerus

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12
Q

Teres major action (2)

A

Flex shoulder

Rotate limb medially

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13
Q

Coracobrachialis origin

A

Coracoid process of the scapula

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14
Q

What’s special about the coracobrachialis origin tendon

A

Its long and surrounded by a synovial sheath

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15
Q

Coracobrachialis insertion

A

crest of the greater tubercle of the humerus, near the teres major tuberosity

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16
Q

Coracobrachilias action (2)

A

Mainly a shoulder stabilizer

Can assist other muscles in adduction and/or extension of the shoulder

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17
Q

Tensor fasciae antebrachii origin

A

fascia covering the lateral surface of the latissimus dorsi

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18
Q

Tensor fasciae antebrachii insertion

A

Olecranon of the ulna, in common with the tendon of insertion of the triceps brachii muscle

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19
Q

Tensor fasciae antebrachii action

A

extend the elbow

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20
Q

Four heads of the triceps brachii

A
  • Long head
  • Lateral head
  • Medial head
  • Accessory head
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21
Q

Triceps brachii origin (3)

A

Long head - caudal border of the scapula

Other heads - tricipital line, proximal humerus

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22
Q

Triceps brachii insertion

A

Olecranon of the ulna

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23
Q

Triceps brachii action (2)

A

Long - flex shoulder

All - extend elbow

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24
Q

Anconeus origin (3)

A

Lateral supracondylar crest of the humerus
Crest of the humerus
Lateral and medial epicondyles of the humerus

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25
Q

Anconeus insertion

A

lateral and proximal aspect of the ulna

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26
Q

Anconeus action

A

extend elbow

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27
Q

Biceps brachii origin

A

Supraglenoid tubercle of the scapula

28
Q

Biceps brachii insertion

A

radial and ulnar tuberosities

29
Q

Biceps brachii action (2)

A

Extend shoulder

Flex elbow

30
Q

Brachialis origin

A

Brachialis groove (proximal and lateral aspect of the humerus)

31
Q

Brachialis insertion

A

Radial and ulnar tuberosities

32
Q

Brachialis action

A

flew elbow

33
Q

Extensor carpi radialis origin

A

Lateral supracondylar crest of the humerus

34
Q

Extensor carpi radialis insertion

A

metacarpal tuberosities of MC II and III

35
Q

Extensor carpi radialis action

A

extend carpus

36
Q

Common digital extensor origin

A

Lateral epicondyle of the humerus

37
Q

Common digital extensor insertion

A

Extensor processes of the distal phalanx of digits II-V

38
Q

Common digital extensor action

A

Extend the joints of the four principle digits

39
Q

Lateral digital extensor origin

A

Lateral epicondyle of the humerus

40
Q

Lateral digital extensor insertion

A

extensor processes of the distal phalanx of digits 3-5

41
Q

Lateral digital extensor action

A

extend the joints of digits 3-5

42
Q

Ulnaris lateralis origin

A

Lateral epicondyle of the humerus

43
Q

Ulnaris lateralis insertion

A

lateral aspect of the proximal end of MC V, accessory carpal bone

44
Q

Ulnaris lateralis action (2)

A

abduct the carpus

flex the carpus

45
Q

Supinator origin

A

lateral epicondyle of the humerus

46
Q

Supinator insertion

A

cranial aspect of the proximal radius

47
Q

Supinator action

A

supination

48
Q

Pronator teres origin

A

medial epicondyle of the humerus

49
Q

Pronator teres insertion

A

Medial border of the radius

50
Q

Pronator teres action

51
Q

Abductor pollicis longus origin

A

lateral and cranial border of the ulna; interosseus membrane between the radius and ulna

52
Q

Abductor pollicis longus insertion

A

proximal end of metacarpal I

53
Q

Abductor pollicis longus action

A

abduct digit I

54
Q

Flexor carpi radialis origin

A

medial epicondyle of the humerus

55
Q

Flexor carpi radialis insertion

A

palmar surface of the proximal aspect of MC II and III

56
Q

Flexor carpi radialis action

A

flex carpus

57
Q

Superficial digital flexor origin

A

medial epicondyle of the humerus

58
Q

Superficial digital flexor insertion

A

Palmar surface of the base of the middle phalanges of digits 2-5

59
Q

Superficial digital flexor action

A

flex carpus, flex digits 2-5

60
Q

Flexor carpi ulnaris origin (2)

A

medial epicondyle of the humerus

olecranon

61
Q

Flexor carpi ulnaris insertion

A

accessory carpal bone

62
Q

Flexor carpi ulnaris action

A

flex carpus

63
Q

Deep digital flexor origin (3)

A

Medial epicondyle of the humerus
Ulna
Radius

64
Q

Deep digital flexor insertion

A

Flexor tubercle of the distal phalanx of each digit

65
Q

Deep digital flexor action

A

Flex carpus

Flex digits

66
Q

Pronator quadratus action

A

pronate the antebrachium

First Semester: Gross Anatomy 1 (19 decks)

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