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2025 Anatomy II > Thoracic Limb OIAs > Flashcards

Thoracic Limb OIAs Flashcards

1
Q

What is the origin of the supraspinatus muscle?

A

-Supraspinous fossa

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2
Q

What is the insertion of the supraspinatus muscle?

A

-Greater & lesser tubercles of the humerus

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3
Q

What is the action of the supraspinatus muscle?

A

-Extend & stabilize the humeral joint

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4
Q

What is the origin of the infraspinatus muscle?

A

-Infraspinous fossa

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5
Q

What is the insertion of the infraspinatus muscle?

A

-Superficial tendon: on the greater tubercle of the humerus (infraspinatus bursa)

-Deep tendon: on the caudal eminence of greater tubercle

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6
Q

What is the action of the infraspinatus muscle?

A

-Fixator & abductor of the humeral joint

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7
Q

What is the origin of the deltoideus muscle?

A

-Caudal border of scapula, aponeurosis which covers infraspinatus

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8
Q

What is the insertion of the deltoideus muscle?

A

-Deltoid tuberosity

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9
Q

What is the action of the deltoideus muscle?

A

-Flexor & abductor of the shoulder

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10
Q

What is the origin of the subclavius muscle?

A

-Cranial part of the sternum closely associated to supraspinatus m.

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11
Q

What is the insertion of the subclavius muscle?

A

-Supraspinatus muscle epimysium

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12
Q

What is the action of the subclavius muscle?

A

-Complement the pectoral muscle

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13
Q

What is the origin of the subscapularis muscle?

A

-Subscapular fossa

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14
Q

What is the insertion of the subscapularis muscle?

A

-Lesser tubercle of humerus

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15
Q

What is the action of the subscapularis muscle?

A

-Stabilize the shoulder & adduction

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16
Q

What is the origin of the teres major muscle?

A

-Caudal angle of the scapula & adjacent caudal border of scapula

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17
Q

What is the insertion of the teres major muscle?

A

-Teres major tuberosity of humerus

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18
Q

What is the action of the teres major muscle?

A

-Mainly flexor of the shoulder

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19
Q

What is the origin of the biceps brachii muscle?

A

-Supraglenoid tubercle of scapula

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20
Q

What is the insertion of the biceps brachii muscle?

A

-Radial tuberosity, extensor carpi radialis m. via lacertus fibrosus

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21
Q

What is the action of the biceps brachii muscle?

A

-Flexor of the elbow & extensor of the shoulder

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22
Q

What is the origin of the triceps brachii muscle?

A

-Long head: Caudal border of scapula

-Lateral head: deltoid tuberosity of humerus

-Medial head: medial aspect of humerus

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23
Q

What is the insertion of the triceps brachii muscle?

A

-Olecranon tuber

24
Q

What is the action of the triceps brachii muscle?

A

-Extension of the elbow & flexion of the shoulder

25
Q

What is the origin of the extensor carpi radialis muscle?

A

-Lateral supracondylar crest of the humerus

26
Q

What is the insertion of the extensor carpi radialis muscle?

A

-Metacarpal tuberosity

27
Q

What nerve is extensor carpi radialis m. innervated by?

A

-Radial n.

28
Q

What is the action of the extensor carpi radialis muscle?

A

-Extend & fix the carpus (& flex the elbow joint)

29
Q

What is the origin of the common digital extensor muscle?

A

-Lateral epicondyle of the humerus

30
Q

What is the insertion of the common digital extensor muscle?

A

-Extensor process of distal phalanx & dorsal surface of proximal & middle phalanges

31
Q

What nerve is the common digital extensor muscle innervated by?

A

-Radial n.

32
Q

What is the action of the common digital extensor muscle?

A

-Extend the carpus & digit (& flex the elbow joint)

33
Q

What is the origin of the lateral digital extensor muscle?

A

-Lateral tuberosity of the radius, lateral collateral ligament of the elbow

34
Q

What is the insertion of the lateral digital extensor muscle?

A

-Dorsal aspect of proximal phalanx

35
Q

What nerve is the lateral digital extensor muscle innervated by?

A

-Radial n.

36
Q

What is the action of the lateral digital extensor muscle?

A

-Extend the carpus and digit

37
Q

What is the origin of ulnaris lateralis muscle?

A

-Lateral epicondyle of the humerus

38
Q

What is the insertion of ulnaris lateralis muscle?

A

-Short tendon: accessory carpal bone

-Long tendon: metacarpal bone IV

39
Q

What nerve is the ulnaris lateralis muscle innervated by?

A

-Radial n.

40
Q

What is the action of ulnaris lateralis muscle?

A

-Flex and abduct the carpus

41
Q

What is the origin of the flexor carpi ulnaris muscle?

A

-Humeral head: medial epicondyle of the humerus

-Ulnar head: olecranon

42
Q

What is the insertion of the flexor carpi ulnaris muscle?

A

-Accessory carpal bone

43
Q

What nerve is flexor carpi ulnaris muscle innervated by?

A

-Ulnar n.

44
Q

What is the action of flexor carpi ulnaris muscle?

A

-Flex the carpus (& extend the elbow joint)

45
Q

What is the origin of the flexor carpi radialis muscle?

A

-Medial epicondyle of the humerus

46
Q

What is the insertion of the flexor carpi radialis muscle?

A

-Metacarpal bone II

47
Q

What nerve is flexor carpi radialis muscle innervated by?

A

-Median n.

48
Q

What is the action of the flexor carpi radialis muscle?

A

-Flex the carpus (& extend the elbow joint)

49
Q

What is the origin of the SDF?

A

-Medial epicondyle of the humerus & radius (proximal accessory lig.)

50
Q

What is the insertion of SDF?

A

-Flexor surfaces of proximal & middle phalanges

51
Q

What nerve is SDF innervated by?

A

-Ulnar n.

52
Q

What is the action of SDF?

A

-Flex the digit (proximal interphalangeal joint) and carpus (& extend the elbow joint)

53
Q

What is the origin of DDF?

A

-Humeral head: medial epicondyle of the humerus (distal accessory lig.)

-Ulnar head: olecranon

-Radial head: radius

54
Q

What is the insertion of DDF?

A

-Flexor surface of the distal phalanx

55
Q

What nerve is DDF innervated by?

A

-Median & ulnar nn.

56
Q

What is the action of DDF?

A

-Flex the digit & carpus (& extend the elbow joint)

2025 Anatomy II (11 decks)

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