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Muscles > Upper Extremity Actions > Flashcards

Upper Extremity Actions Flashcards

1
Q

Action of Trapezius

A

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

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2
Q

Action of Latissimus Dorsi

A 
Adduction
Extension
Internal Rotation
Depression
Lateral Flexion (to same side)
Elevation of Pelvis
Contralateral rotation
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3
Q

Action of Levator Scapulae

A

Downward rotation

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4
Q

Action of Rhomboid Minor

A

Adduction
Slight Downward Rotation
Slight elevation

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5
Q

Action of Rhomboid Major

A

Adduction
Slight elevation
Slight downward rotation

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6
Q

Action of Deltoid

A

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

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7
Q

Action of Teres Major

A

Internal rotation

Extension

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8
Q

Action of Supraspinatous

A

Abduction (10-15 degrees before deltoid takes over)

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9
Q

Action of Infraspinatous

A

External rotation

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10
Q

Action of Teres Minor

A

?

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11
Q

Action of Subscapularis

A

Slight adduction

Internal rotation

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12
Q

Action of Pectoralis Major

A

Internal Rotation

Main function is Adduction

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13
Q

Action of Pectoralis Minor

A

Protraction
Some downward rotation of scapula
Anterior tilt of scapula

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14
Q

Action of Subclavius

A

?

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15
Q

Action of Serratus Anterior

A

?

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16
Q

Action of Sternocleidomastoid

A

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

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17
Q

Action of Scalene

A

Elevation

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18
Q

Action of Biceps Brachii

A

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

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19
Q

Action of Coracobrachialis

A

Flexes arm
Adducts arm
Stabilizes glenohumeral joint

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20
Q

Action of Brachialis

A

Flexion of elbow joint

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21
Q

Action of Triceps Brachii

A

Chief extensor of forearm

22
Q

Action of Anconeous

A

Assists triceps in extending forearm

Stabilizes elbow joint

23
Q

Action of Supinator

A

Supinates forearm (ie rotates radius to turn palm anteriorly)

24
Q

Action of Pronator Teres

A

Pronates and flexes forearm (at elbow)

25
Q

Action of Pronator Quadratus

A

Pronates forearm

Deep fibers bind radius and ulna together

26
Q

Action of Palmaris Longus

A

Flexes hand at wrist

Tightens palmar aponeurosis

27
Q

Action of Flexor Carpi Radialis

A

Radial Flexion

28
Q

Action of Flexor Carpi Ulnaris

A

Wrist flexion

29
Q

Action of Flexor Digitorum Superficialis

A

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
Q

Action of Flexor Digitorum Profundus

A

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

31
Q

Action of Flexor Pollicis Longus

A

Flexes phalanges of 1st digit (thumb)

32
Q

Action of Abductor Pollicis Brevis

A

Flexes thumb

33
Q

Action of Brachioradialis

A

Flexes forearm

34
Q

Action of Extensor Carpi Radialis Brevis

A

Extend and abduct hand at wrist joint

35
Q

Extensor Carpi Radialis Longus

A

Extend hand at wrist joint

Abduct hand at wrist joint

36
Q

Action of Extensor Digitorum (all medial 4)

A

Extends medial four digits at metacarpophalangeal joints

Extends hand at wrist joint

37
Q

Action of Extensor Carpi Ulnaris

A

Extends and adducts hand at wrist joint

38
Q

Action of Extensor Digiti Minimi

A

Extends 5th digit at metacarpophalangeal and interphalangeal joints

39
Q

Action of Extensor Indices

A

Extends 2nd digit

Helps to extend hand

40
Q

Action of Extensor Pollicis Brevis

A

Extends proximal phalanx of thumb at carpometacarpal joint

41
Q

Action of Extensor Pollicis Longus

A

Extends distal phalanx of thumb at carpometacarpal and interphalangeal joints

42
Q

Action of Abductor Pollicis Brevis

A

Abducts thumb and helps oppose it

43
Q

Action of Opponens Pollicis

A

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

44
Q

Action of Flexor Pollicis Brevis

A

Flexes thumb

45
Q

Action of Abductor Digiti Minimi

A

Abducts little (5th) finger

46
Q

Action of Flexor Digiti Minimi

A

Flexes proximal phalanx of little (5th) finger

47
Q

Action of Opponens Digit Minimi

A

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

48
Q

Action of Adductor Pollicis

A

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

49
Q

Action of Interosseous Muscles (Palmar)

A

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

50
Q

Action of Lumbricals

A 
Finger flexion (metacarpophalangeals)
Finger Extension (interphalangeal)
51
Q

Action of Interosseous Muscles (Dorsal)

A

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

Muscles (9 decks)

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