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Zak, Anatomy > Muscles: Actions > Flashcards

Muscles: Actions Flashcards

0
Q

Latissimus Dorsi

A

Extends, adducts, medially rotates humerus

Raises torso towards arms during climbing

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1
Q

Trapezius

A

Elevation/upward rotation of scapula
Retracts scapula
Depression/upward rotation of scapula

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2
Q

Rhomboid Major

A

Retract, elevate, rotate scapula downward

Fix scapula to thoracic wall

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3
Q

Rhomboid Minor

A

Retract, elevate, rotate scapula downward

Fix scapula to thoracic wall

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4
Q

Levator Scapulae

A

Elevates scapula

Tilts glenoid fossa inferiorly by rotating scapula

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5
Q

Serratus Posterior Superior

A

Elevates ribs

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6
Q

Serratus Posterior Inferior

A

Depress ribs

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7
Q

Splenius

A

Bilaterally: extend head & neck
Unilaterally: laterally flex neck/rotate head

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8
Q

Iliocostalis

A

Bilaterally: extend vertebral column, head
Unilaterally: laterally flex vertebral column

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9
Q

Longissimus

A

Bilaterally: extend vertebral column, head
Unilaterally: laterally flex vertebral column

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10
Q

Spinals

A

Bilaterally: extend vertebral column, head
Unilaterally: laterally flex vertebral column

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11
Q

Semispinalis

A

Extend head, thoracic, cervical regions

Rotate them contralaterally

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12
Q

Multifidus

A

Stabilize vertebrae during localized movement of vertebral column

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13
Q

Rotatores

A

Extend head, thoracic, cervical regions

Rotate them contralaterally

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14
Q

Rectus Capitis Posterior Minor

A

Extension of head

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15
Q

Rectus Capitis Posterior Major

A

extension/ipsilateral rotation of head

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16
Q

Obliquus Capitis Inferior

A

Ipsilateral rotation of head

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17
Q

Obliquus Capitis Superior

A

Extension/ipsilateral rotation of head

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18
Q

Pectoralis Major

A

adduct/medially rotate humerus
Draw scapula anterior/inferior
Clavicular portion flexes humerus
Sternal portion extends humerus when flexed

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19
Q

Pectoralis Minor

A

Stabilize scapula by pulling anterior/inferior against posterior thoracic wall

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20
Q

Subclavius

A

Anchor and depress clavicle

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21
Q

Serratus Anterior

A

Protract/rotate/hold scapula against thorax

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22
Q

Deltoid

A

Flex/medially rotate, abduct, extend, & laterally rotate humerus

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23
Q

Teres Major

A

Adducts/medially rotates humerus

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24
Q

Supraspinatus

A

Abduction of humerus/stabilize shoulder joint

25
Q

Subscapularis

A

Medially rotate/adduct humerus

Hold humeral head in place

26
Q

Infraspinatus

A

Laterally rotate humerus, help hold humeral head in place

27
Q

Teres Minor

A

Laterally rotate humerus, help hold humeral head in place

28
Q

Biceps brachii

A

Supinate forearm
Flex forearm when supine
Resist shoulder dislocation

29
Q

Coracobrachialis

A

Flex/adduct arm at shoulder

Resist shoulder dislocation

30
Q

Brachialis

A

Flex forearm at elbow

31
Q

Triceps Brachii

A

Extend forearm at elbow

Resist dislocation of shoulder

32
Q

Anconeus

A

Extension of forearm/stabilize elbow

Abducts ulna during pronation

33
Q

Pronator Teres

A

Pronates/flexes forearm at elbow

34
Q

Flexor Carpi Radialis

A

Flexes/abducts (radially deviates) hand at wrist

35
Q

Palmaris Longus

A

Flexes hand at wrist

Tenses palmar aponeurosis

36
Q

Flexor Carpi Ulnaris

A

Flexes/adducts (ulnarly deviates) hand at wrist

37
Q

Flexor Digitorum Superficialis

A

Flexes middle phalanges at proximal interphalangeal joint

Flexes proximal phalanges at metacarpophalangeal joints

38
Q

Flexor Digitorum Profundus

A

Flexes distal phalanges at interphalangeal joints

39
Q

Flexor Pollicis Longus

A

Flexes thumb

40
Q

Pronator Quadratus

A

Pronates forearm, binds radius/ulna together

41
Q

Brachioradialis

A

Flexes forearm when pronated

42
Q

Extensor Carpi Radialis Longus

A

Extend/abduct hand at wrist

43
Q

Extensor Carpi Radialis Brevis

A

Extend/abducts hand at wrist

44
Q

Extensor Digitorum

A

Extends medial 4 fingers at metacarpophalangeal joints

somewhat at interphalangeal joints

45
Q

Extensor Digit Minimi

A

Extends 5th finger at metacarphophalangeal and interphalangeal joints

46
Q

Extensor Carpi Ulnaris

A

Extends/adducts hand at wrist

47
Q

Supinator

A

Supinates forearm

48
Q

Extensor Indicis

A

Independent extension of 2nd finger & extension of wrist

49
Q

Abductor Pollicis Longus

A

Abducts thumb/extends it at carpometacarpal joint

50
Q

Extensor Pollicis Brevis

A

Extends proximal phalanx of thumb at metacarpophalangeal joint & extends carpometacarpal joint

51
Q

Extensor Pollicis Longus

A

Extends distal phalanx of thumb at interphalangeal joint & extends the metacarpophalangeal/carpometacarpal joints

52
Q

Abductor Pollicis Brevis

A

Abduct thumb, aid in opposition

53
Q

Flexor Pollicis Brevis

A

Flexes thumb

54
Q

Opponens Pollicis

A

Oppose thumb/medially rotate 1st metacarpal

55
Q

Adductor Pollicis

A

Adducts thumb toward lateral border of palm

56
Q

Flexor Digit Minimi

A

Abducts 5th digit, aids in flexion of 5th proximal phalanx

57
Q

Abductor Digiti Minimi

A

Flexes proximal phalanx of digit 5

58
Q

Opponens Digiti Minimi

A

Brings 5th metacarpal anterior & rotates it to bring it into opposition with thumb

59
Q

Palmer Interossei

A

Adduct 2nd, 4th, & 5th fingers toward axial line

60
Q

Dorsal Interossei

A

Abduct 2nd, 3rd, & 4th fingers toward axial line

Zak, Anatomy (18 decks)

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