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OS 203 > Upper Extremity - Action > Flashcards

Upper Extremity - Action Flashcards

0
Q

What is the action of the latissimus dorsi muscle?

A

Extensor, adductor and medial rotator of the arm

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1
Q

What is the action of the trapezius muscle?

A

Upper and lower fibers - abduction of the arm

Upper fibers - elevate shoulder; brace for weight-bearing

Central fibers - retract shoulder

Lower fibers - depresses scapula

Both muscles - adduction of arm

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2
Q

What is the action of the deltoid?

A

Principal - abduction of arm

Anterior fibers - flexor and medial rotator

Posterior fibers - extensor and lateral rotator

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3
Q

What is the action of the supraspinatus?

A

Abduction and lateral rotation of the arm

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4
Q

What is the action of the infraspinatus?

A

Lateral rotator of the arm

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5
Q

What is the action of the teres minor?

A

Lateral rotator and weak adductor of the arm

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6
Q

What is the action of the teres major?

A

Extensor, adductor and medial rotator of the arm

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7
Q

What is the action of the subscapularis?

A

Medial rotator and adductor of the arm

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8
Q

What is the action of the pectorals major?

A

Adductor, flexor and medial rotator of the arm

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9
Q

What is the action of the biceps brachii?

A

Supinator; flexor (when supinated)

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10
Q

What is the action of the coracobrachialis?

A

Flexor and adductor of the arm

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11
Q

What is the action of the brachialis?

A

Flexor of the forearm

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12
Q

What is the action of the triceps brachii?

A

Extensor of the forearm

Long head - extensor of the arm

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13
Q

What is the action of the anconeus?

A

Extensor of the forearm; abductor of the ulna (pronated)

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14
Q

What is the action of the pronator teres?

A

Flexor and rotator of the forearm

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15
Q

What is the action of the pronator quadratus?

A

Pronator of the forearm

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16
Q

What is the action of the flexor carpi radialis?

A

Flexor of the hand; abductor of the wrist

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17
Q

What is the action of the palmaris longus?

A

Flexor of the hand; tightens palmar aponeurosis

18
Q

What is the action of the flexor carpi ulnaris?

A

Flexor and adductor of the hand

19
Q

What is the action of the flexor digitoxin superficialis?

A

Flexor at the PIPs, MCPs and wrist joints

20
Q

What is the action of the flexor digitorum profundus?

A

Primary - flexor of the DIPs

21
Q

What is the function of the flexor pollicis longus?

A

Primary - flexor of the distal phalanx of thumb

22
Q

What is the action of the supinator?

A

Supinator of the arm

23
Q

What is the function of the brachioradialis?

A

Accessory flexor of the forearm

24
Q

What is the action of the extensor carpi radialis longus?

A

Extensor and abductor of the hand

25
Q

What is the action of the extensor carpi radialis brevis?

A

Extensor and abductor of the hand

26
Q

What is the action of the extensor digitorum?

A

Extension of digits at the IP and MCP joints and wrist

27
Q

What is the action of the extensor digiti minimi?

A

Extensor of the 5th digit at the IP and MCP joints and wrist

28
Q

What is the action of the extensor carpi ulnaris?

A

Extensor and adductor of the hand

29
Q

What is the action of the abductor pollicis longus?

A

Abductor, extensor and lateral rotator of the thumb

30
Q

What is the action of the extensor pollicis brevis?

A

Extensor of the PP of thumb at MCP and metacarpal at CMC joint

31
Q

What is the action of the extensor pollicis longus?

A

Extensor of the thumb at the MCP and IP joints; abductor of the thumb

32
Q

What is the action of the extensor indicis?

A

Extensor of the 2nd digit

33
Q

What is the action of the abductor pollicis brevis?

A

Abductor of the CMC and MCP joints of the thumb

34
Q

What is the action of the flexor pollicis brevis?

A

Flexor of the thumb at the MCP joint; medial rotator of the 1st metacarpal

35
Q

What is the action of the opponent pollicis?

A

Medial rotator of the 1st metacarpal

36
Q

What is the action of the adductor pollicis?

A

Adductor of the proximal phalanx of thumb towards middle digit

37
Q

What is the action of the abductor digiti minimi?

A

Abduction of the 5th digit

38
Q

What is the action of the flexor digiti minimi brevis?

A

Flexor of the proximal phalanx of 5th digit at MCP joint

39
Q

What is the action of the opponents digiti minimi?

A

Abductor, flexor and lateral rotator of 5th metacarpal

40
Q

What is the action of the lumbricals?

A

Flexor at the MCP joint; extensor at the IP joints

41
Q

What is the action of the dorsal interposed muscles?

A

Abductor of the fingers; extensor of distal phalanges; flexor at the MCP joint

42
Q

What is the action of the palmar interossei?

A

Adductor of the fingers; flexor at the MCP; extensor of the distal phalanges

OS 203 (8 decks)

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