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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
Anconeus - action
extend elbow (humeroulnar joint)
26
Extensor Indicis - action
extend 2nd finger (metacarpophalangeal joint), adduct 2nd finger, and may assit extension of wrist (radiocarpal joint)
27
Flexor Carpi Radialis - action
flex wrist (radiocarpal joint), abduct wrist (radiocarpal joint), assist flexion of elbow (humeroulnar joint)
28
Palmaris Longus - action
Tense palmar fascia, flex wrist (radiocarpal joint), assist flexion of elbow
29
Flexor Carpi Ulnaris - action
Flex wrist, adduct wrist, assist flexion of elbow
30
Flexor Digitorum Superficialis - action
flex 2nd - 5th fingers and flex wrist
31
Flexor Digitorum Profundus - action
flex 2nd - 5th fingers and assist flexion of wrist
32
Pronator Teres - action
Pronate forearm and assist flexion of elbow
33
Pronator quadratus - action
pronate forearm
34
Supinator - action
supinate forearm
35
Abductor Pollicis Longus
Abduct thumb, extend thumb, abduct wrist
36
Extensor Pollicis Longus and Brevis
Extend thumb and abduct wrist
37
Flexor Pollicis Longus
Flex thumb, assist to flex wrist
38
Abductor Pollicis Brevis
Abduct thumb and assist in opposition
39
Flexor Pollicis Brevis
Flex thumb and assist in opposition of thumb
40
Opponens Pollicis
Opposition of thumb
41
Adductor Pollicis
Adduct the thumb and assist to flex the thumb
42
Lumbricals of Hand
extend 2nd - 5th fingers and flex 2nd - 5th fingers
43
Palmar Interossei
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
Dorsal Interossei
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
Abductor Digiti Minimi
Abduct 5th finger toward thumb and assist in oppositon of 5th finger toward thumb
46
Flexor Digiti Minimi Brevis
Flex 5th finger and assist in opposition of 5th finger toward the thumb
47
Opponens Digiti Minimi
Opposition of 5th finger
48
Erector Spinae Group
Unilaterally: Laterally flex vertebral column to same side Bilaterally: Extend the vertebral column
49
Erector Spinae Group includes what muscles
Spinalis, longissimus, and iliocostalis
50
Multifidi and rotatores
Unilaterally: Rotate the vertebral column to opposite side Bilaterally: Extend vertebral column
51
Semispinalis Capitis
Extend the vertebral column and head
52
Splenius Capitis and Cervicis
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
Suboccipitals
Rotate the head to teh same side and Laterally flex the head to the same side
54
Quadratus Lumborum
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
Rectus Abdominal
Flex vertebral column and tilt pelvis posteriorly
56
External oblique
Unilaterally: laterally flex vertebral column to same side, rotate vertebral column to opposite side Bilaterally: Flex vertebral column and compress abdominal contents
57
Internal Oblique
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
Transverse Abdominis
Compress abdominal contents
59
Diaphragm
Draw down central tendon of the diaphragm and increase volumne of thoracic cavity during inhalation
60
Intercostals
External assist with inhalation Internal assist with exhalation
61
Serratus Posterior Superior
Elevate ribs during inhalation
62
Serratus Posterior Inferior
Depress ribs during exhalation
63
Intertransversarii
Unilaterally: laterally flex vertebral column to teh same side Bilaterally: extend the vertebral column
64
Interspinalis
Extend vertebral column
65

MBLEx Study Guide (4 decks)

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