Upper Extremity Actions Flashcards Preview

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Flashcards in Upper Extremity Actions Deck (51):
1

Action of Trapezius

Upper: Elevation and upward rotation
Middle: Adduction and upward rotation
Lower: Upward rotation

2

Action of Latissimus Dorsi

Adduction
Extension
Internal Rotation
Depression
Lateral Flexion (to same side)
Elevation of Pelvis
Contralateral rotation

3

Action of Levator Scapulae

Downward rotation

4

Action of Rhomboid Minor

Adduction
Slight Downward Rotation
Slight elevation

5

Action of Rhomboid Major

Adduction
Slight elevation
Slight downward rotation

6

Action of Deltoid

Anterior: flexion, abduction, internal rotation
Middle: abduction
Posterior: extension, abduction, external rotation

7

Action of Teres Major

Internal rotation
Extension

8

Action of Supraspinatous

Abduction (10-15 degrees before deltoid takes over)

9

Action of Infraspinatous

External rotation

10

Action of Teres Minor

?

11

Action of Subscapularis

Slight adduction
Internal rotation

12

Action of Pectoralis Major

Internal Rotation
Main function is Adduction

13

Action of Pectoralis Minor

Protraction
Some downward rotation of scapula
Anterior tilt of scapula

14

Action of Subclavius

?

15

Action of Serratus Anterior

?

16

Action of Sternocleidomastoid

Alone: tilts head to same side, rotates face to opposite side
Working together: flexes neck, raises sternum and assists in forced inspiration

17

Action of Scalene

Elevation

18

Action of Biceps Brachii

Powerful supinator of forearm
Powerful flexor of elbow joint
Weak flexor of shoulder joint

19

Action of Coracobrachialis

Flexes arm
Adducts arm
Stabilizes glenohumeral joint

20

Action of Brachialis

Flexion of elbow joint

21

Action of Triceps Brachii

Chief extensor of forearm

22

Action of Anconeous

Assists triceps in extending forearm
Stabilizes elbow joint

23

Action of Supinator

Supinates forearm (ie rotates radius to turn palm anteriorly)

24

Action of Pronator Teres

Pronates and flexes forearm (at elbow)

25

Action of Pronator Quadratus

Pronates forearm
Deep fibers bind radius and ulna together

26

Action of Palmaris Longus

Flexes hand at wrist
Tightens palmar aponeurosis

27

Action of Flexor Carpi Radialis

Radial Flexion

28

Action of Flexor Carpi Ulnaris

Wrist flexion

29

Action of Flexor Digitorum Superficialis

Flexes middle phalanges at priximal interphalangeal joints of medial 4 digits
Acting more strongly, it also flexes proximal phalanges at metacarpophalangeal joints and hand

30

Action of Flexor Digitorum Profundus

Flexes distal phalanges at distal interphalangeal joints of medial 4 digits
Assits in flexion of hand

31

Action of Flexor Pollicis Longus

Flexes phalanges of 1st digit (thumb)

32

Action of Abductor Pollicis Brevis

Flexes thumb

33

Action of Brachioradialis

Flexes forearm

34

Action of Extensor Carpi Radialis Brevis

Extend and abduct hand at wrist joint

35

Extensor Carpi Radialis Longus

Extend hand at wrist joint
Abduct hand at wrist joint

36

Action of Extensor Digitorum (all medial 4)

Extends medial four digits at metacarpophalangeal joints
Extends hand at wrist joint

37

Action of Extensor Carpi Ulnaris

Extends and adducts hand at wrist joint

38

Action of Extensor Digiti Minimi

Extends 5th digit at metacarpophalangeal and interphalangeal joints

39

Action of Extensor Indices

Extends 2nd digit
Helps to extend hand

40

Action of Extensor Pollicis Brevis

Extends proximal phalanx of thumb at carpometacarpal joint

41

Action of Extensor Pollicis Longus

Extends distal phalanx of thumb at carpometacarpal and interphalangeal joints

42

Action of Abductor Pollicis Brevis

Abducts thumb and helps oppose it

43

Action of Opponens Pollicis

Draws 1st metacarpal laterally to oppose thumb toward center of palm and rotates it medially

44

Action of Flexor Pollicis Brevis

Flexes thumb

45

Action of Abductor Digiti Minimi

Abducts little (5th) finger

46

Action of Flexor Digiti Minimi

Flexes proximal phalanx of little (5th) finger

47

Action of Opponens Digit Minimi

Draws 5th metacarpal anteriorly and rotates it, bringing little finger (5th digit) into opposition with thumb

48

Action of Adductor Pollicis

Draws 1st metacarpal laterally to oppose thumb toward center of pam and rotates it medially

49

Action of Interosseous Muscles (Palmar)

Palmar 1-3: Adducts digits toward axial line and assist lumbricals in flexing metcarpophalangeal joints and extending interphalanageal joints

50

Action of Lumbricals

Finger flexion (metacarpophalangeals)
Finger Extension (interphalangeal)

51

Action of Interosseous Muscles (Dorsal)

Dorsal 1-4: Abduct digits from axial line and act with lumbricals to flex metacarpophalangeal joints and extend interphalangeal joints