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MBLEx Study Guide > Muscle action > Flashcards

Muscle action Flashcards

1
Q

Deltoid - action

A

All abduct the shoulder at glenohumeral joint Anterior - flexes shoulder at GH joint, medially roates shoulder at GH joint, and horizontaally adducts the shoulder at GH joint Posterior - Extends shoulder at GH joint, laterally rotates shoulder at GH joint, and horizontally adducts shoulder at GH joint

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2
Q

Trapezius - action

A

All extend the head and neck Upper - laterally flex head and neck to same side, rotate the head and neck to opposite side, elevate scapula Middle - adduct the scapula, stabilize the scapula Lower - depress the scapula, upwardly rotate the scapula

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3
Q

Latissimus Dorsi - action

A

Extend the shoulder at GH joint, adduct the shoulder at GH joint, and medially rotate the shoulder at the GH joint

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4
Q

Teres Major - Action

A

Extend shoulder at GH joint, adduct shoulder at GH joint, and medially rotate shoulder at GH joint

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5
Q

Supraspinatus - Action

A

Abduct the shoulder at GH joint. stabilize head of humerus in glenoid cavity

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6
Q

Teres Minor - action

A

laterally rotate shoulder at GH joint, adduct shoulder at GH joint, stabilize head of humerus in glenoid cavity

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7
Q

Infraspinatus - action

A

laterally rotate shoulder at GH joint, adduct the shoulder at the GH joint, and stabilize head of humerus at glenoid cavity

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8
Q

Suubscapularis - action

A

medially rotate shoulder at GH joint, Stabilize head of humerus

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9
Q

Rhomboid Major - action

A

adduct the scapula (scapulothoracic joint), Elevate the scapula at ST joint, downwardly rotate scapula at ST joint

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10
Q

Rhomboid Minor - Action

A

Adduct scapula at ST joint, elevate scapula at ST joint, and downwardly rotate scapula at ST joint

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11
Q

Levator scapula - action

A

elevate scapula at ST joint, downwardly rotate scapula at ST joint, laterally flex head and and neck, and rotate head and neck to the same side - bilaterally extend head and neck

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12
Q

Serratus Anterior - action

A

with origin (ribs) fixed: Abduction of scapula at ST joint, upwardly rotate scapula at ST joint, depress scapula at ST joint, hold medial border of scapula against the rib cage with scapula fixed: may elevate border the thorax during forced inhalation

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13
Q

Pectoralis Major - Action

A

All fibers: Adduct shoulder at GH joint, medially rotate at GH joint, and assist to elevate thorax during forced inhalation Upper fibers: Flex shoulder at GH joint, horizontally adduct shoulder at GH joint Lower fibers: Extend shoulder at GH joint

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14
Q

Pectoralis Minor - action

A

Depress scapula at ST joint, abduct scapula at ST joint, downwardly rotate scapula at ST joint, may assist to elevate thorax during forced inhalation

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15
Q

Subclavius - action

A

Depress clavicle and draw it anteriorly, elevate first rib (assist during inhalation), stabilize SC joint

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16
Q

Biceps Brachii - action

A

Flex the elbow (humeroulnar joint), Supinate forearm (radioulnar joint), and flex shoulder (glenohumeral joint)

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17
Q

Triceps Brachii - action

A

All: extend the elbow (humeroulnar joint) Long head: Extend shoulder (glenohumeral joint), adduct shoulder GH joint

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18
Q

Coracobrachialis - action

A

Flex shoulder at GH joint, adduct shoulder at GH joint

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19
Q

Brachialis - action

A

Flex elbow (humeroulnar joint)

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20
Q

Brachioradialis - action

A

Flex elbow (humeroulnar joint), assist pronation and supination when there is resistance

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21
Q

Extensor Carpi Radialis Longus - action

A

Extend wrist (radiocarpal joint), abduct wrist (radiocarpal joint), assist flexion of elbow (humeroulnar joint)

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22
Q

Extensor Carpi Radialis Brevis - action

A

extend wrist (radiocarpal joint), abduct wrist (radiocarpal joint), assist flexion of elbow (humeroulnar joint)

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23
Q

Extensor Carpi Ulnaris - action

A

Extend wrist (radiocarpal joint), adduct wrist (radiocarpal joint)

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24
Q

Extensor Digitorum - action

A

Extend 2nd - 5th fingers and assist extension of wrist (radiocarpal joint)

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25
Q

Anconeus - action

A

extend elbow (humeroulnar joint)

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26
Q

Extensor Indicis - action

A

extend 2nd finger (metacarpophalangeal joint), adduct 2nd finger, and may assit extension of wrist (radiocarpal joint)

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27
Q

Flexor Carpi Radialis - action

A

flex wrist (radiocarpal joint), abduct wrist (radiocarpal joint), assist flexion of elbow (humeroulnar joint)

28
Q

Palmaris Longus - action

A

Tense palmar fascia, flex wrist (radiocarpal joint), assist flexion of elbow

29
Q

Flexor Carpi Ulnaris - action

A

Flex wrist, adduct wrist, assist flexion of elbow

30
Q

Flexor Digitorum Superficialis - action

A

flex 2nd - 5th fingers and flex wrist

31
Q

Flexor Digitorum Profundus - action

A

flex 2nd - 5th fingers and assist flexion of wrist

32
Q

Pronator Teres - action

A

Pronate forearm and assist flexion of elbow

33
Q

Pronator quadratus - action

A

pronate forearm

34
Q

Supinator - action

A

supinate forearm

35
Q

Abductor Pollicis Longus

A

Abduct thumb, extend thumb, abduct wrist

36
Q

Extensor Pollicis Longus and Brevis

A

Extend thumb and abduct wrist

37
Q

Flexor Pollicis Longus

A

Flex thumb, assist to flex wrist

38
Q

Abductor Pollicis Brevis

A

Abduct thumb and assist in opposition

39
Q

Flexor Pollicis Brevis

A

Flex thumb and assist in opposition of thumb

40
Q

Opponens Pollicis

A

Opposition of thumb

41
Q

Adductor Pollicis

A

Adduct the thumb and assist to flex the thumb

42
Q

Lumbricals of Hand

A

extend 2nd - 5th fingers and flex 2nd - 5th fingers

43
Q

Palmar Interossei

A

Adduct thumb, 2nd, 4th, and 5th fingers toward 3rd finger, Flex thumb, 2nd, 4th, and 5th fingers and assist to extend thumb, 2nd, 4th, and 5th fingers

44
Q

Dorsal Interossei

A

Abduct 2nd, 3rd, and 4th fingers, flex 2nd, 3rd, and 4th fingers at metacarpophalangeal joints, and extend 2nd, 3rd, and 4th fingers at interphalangeal joints

45
Q

Abductor Digiti Minimi

A

Abduct 5th finger toward thumb and assist in oppositon of 5th finger toward thumb

46
Q

Flexor Digiti Minimi Brevis

A

Flex 5th finger and assist in opposition of 5th finger toward the thumb

47
Q

Opponens Digiti Minimi

A

Opposition of 5th finger

48
Q

Erector Spinae Group

A

Unilaterally: Laterally flex vertebral column to same side

Bilaterally: Extend the vertebral column

49
Q

Erector Spinae Group includes what muscles

A

Spinalis, longissimus, and iliocostalis

50
Q

Multifidi and rotatores

A

Unilaterally: Rotate the vertebral column to opposite side

Bilaterally: Extend vertebral column

51
Q

Semispinalis Capitis

A

Extend the vertebral column and head

52
Q

Splenius Capitis and Cervicis

A

Unilaterally: Rotate the head and neck to the same side and Laterally flex the head and neck to teh same side

Bilaterally: Extend the head and neck

53
Q

Suboccipitals

A

Rotate the head to teh same side and Laterally flex the head to the same side

54
Q

Quadratus Lumborum

A

Unilaterally: Laterally tilt (elevate) pelvis, laterally flex teh vertebral column to the same side, assist to extend vertebral column

Bilaterally: Fix the last ribe during forced inhalation and exhalation

55
Q

Rectus Abdominal

A

Flex vertebral column and tilt pelvis posteriorly

56
Q

External oblique

A

Unilaterally: laterally flex vertebral column to same side, rotate vertebral column to opposite side

Bilaterally: Flex vertebral column and compress abdominal contents

57
Q

Internal Oblique

A

Unilaterally: laterally flex vertebral column to the same side and rotate vertebral column to teh same side

Bilaterally: Flex the vertebral column and compress abdominal contents

58
Q

Transverse Abdominis

A

Compress abdominal contents

59
Q

Diaphragm

A

Draw down central tendon of the diaphragm and increase volumne of thoracic cavity during inhalation

60
Q

Intercostals

A

External assist with inhalation

Internal assist with exhalation

61
Q

Serratus Posterior Superior

A

Elevate ribs during inhalation

62
Q

Serratus Posterior Inferior

A

Depress ribs during exhalation

63
Q

Intertransversarii

A

Unilaterally: laterally flex vertebral column to teh same side

Bilaterally: extend the vertebral column

64
Q

Interspinalis

A

Extend vertebral column

65
Q
A

MBLEx Study Guide (4 decks)

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