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Back and Upper Arm Musculature > Muscle Actions > Flashcards

Muscle Actions Flashcards

1
Q

Subscapularis

A

Medial rotation of the humerus
Adduction of shoulder
Reinforce glenohumeral joint

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2
Q

Teres Minor

A

Lateral shoulder rotation

Reinforce glenohumeral joint

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3
Q

Infraspinatus

A

Lateral shoulder rotation

Reinforce glenohumeral joint

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4
Q

Supraspinatus

A

Abduct shoulder

Reinforce glenohumeral joint

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5
Q

Teres Major

A

Adduction of the shoulder

Medial rotation of the humerus

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6
Q

Deltoid

A

Shoulder abductor
Shoulder flexor
Shoulder extender

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7
Q

Semispinalis

A

Extends the head, C, and T

Rotates T and C regions

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8
Q

Splenius

A

Flex the neck, rotate the head

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9
Q

Longissimus

A

Extend vertebral column and head, eccentric back flexion.

Flexes vertebral column if unilateral

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10
Q

Spinalis

A

Extend vertebral column and head, eccentric back flexion.

Flexes vertebral column if unilateral

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11
Q

Iliocostalis

A

Extend vertebral column and head, eccentric back flexion.

Flexes vertebral column if unilateral

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12
Q

Levator Scapulae

A

Elevates scapula

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13
Q

Rhomboid Major

A

Retract scapula, weak elevation

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14
Q

Rhomboid Minor

A

Retract scapula, weak elevation

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15
Q

Latissimus Dorsi

A

Extend shoulder, adduct should, medial rotation of the humerus

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16
Q

Trapezius

A

Elevate, depress, and retract the scapula

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17
Q

Biceps brachii

A

Elbow flexion, Arm flexion, supination

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18
Q

Coracobrachialis

A

Flex shoulder

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19
Q

Brachialis

A

Flex elbow

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20
Q

Triceps brachii

A

Extend shoulder, extend elbow

21
Q

Pronator teres

A

pronate arm, weak elbow flexion

22
Q

Flexor carpi radialis

A

flex, abduct wrist

23
Q

palmaris longus

A

flex hand, weak elbow flexion

24
Q

flexor carpi ulnaris

A

flex wrist, adduct hand

25
Q

brachioradialis

A

weak elbow flexor

26
Q

flexor digitorum superficialis

A

flex PIP joint and metacarpophalangeal joint, poor elbow flexion

27
Q

Flexor pollicis longus

A

flex thumb

28
Q

pronator quadratus

A

pronation

29
Q

flexor digitorum profundus

A

flex distal IP joint, assist with wrist flexion

30
Q

extensor carpi radialis longus

A

extend, abduct wrist

31
Q

extensor carpi radialis brevis

A

extend, abduct wrist

32
Q

extensor digitorum

A

extend wrist, extend metacarpophalangeal joints and interphalangeal joints

33
Q

extensor carpi ulnaris

A

extend and adduct wrist

34
Q

supinator

A

supination, rotate radius to turn palm

35
Q

abductor pollicis longus

A

extend wrist, abduct thumb, extend carpometacarpal joint

36
Q

extensor pollicis brevis

A

extend wrist, extend prox pollic phalanx, extend carpometacarpal joint

37
Q

extensor pollicis longus

A

extend wrist, extend distal pollic phalanx, extend carpometacarpal joint

38
Q

extensor indicis

A

extend wrist, extend index finger

39
Q

Opponens pollicis

A

draws metacarpal 1 in medially and rotates it

40
Q

abductor pollicis brevis

A

abducts thumb, aids in opposition

41
Q

flexor pollicis brevis

A

flexes thumb

42
Q

adductor pollicis

A

adducts thumb

43
Q

abductor digiti minimi

A

abducts 5th digit

44
Q

flexor digiti minimi

A

flexes proximal phalanx of 5th finger

45
Q

opponens digiti minimi

A

draws 5th metacarpal anteriorally and rotates it for opposition

46
Q

lumbricals

A

flex metacarpophalangeal joints, extend interphalangeal joints of digits 2-5

47
Q

dorsal interossei

A

abduct digits 2-4, flex metacarpophalangeal joints, extend interphalangeal joints

48
Q

palmer interossei

A

adduct digits 2, 4, 5, flex metacarpophalangeal joints, extend interphalangeal joints

49
Q

palmaris brevis

A

wrinkles palmar skin during grip

Back and Upper Arm Musculature (7 decks)

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