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Muscle Actions Flashcards

1
Q

Trapezius

A

Elevate, depress, retract, and rotate scapula superiorly (depending on fibers - upper/mid/lower)

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2
Q

Latissimus Dorsi

A

Extension and medial rotation of arm

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3
Q

Levator Scapulae

A

Scapular elevation

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4
Q

Rhomboid major and minor

A

Scapular retraction, elevation, rotate inferiorly

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5
Q

Serratus posterior superior

A

Elevate ribs

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6
Q

Serratus posterior inferior

A

Depress ribs

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7
Q

Splenus capitus and cervicus

A

Bilaterally extend C-Spine

Unilaterally flex and rotate head to same side

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8
Q

Erector spinae - Iliocostalis

A

Bilaterally extend spine

Unilaterally side bend

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9
Q

Erecrtor spinae - longissimus

A

Bilaterally extend head/spine

Unilaterally side bend

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10
Q

Etector spinae - Spinalis

A

Bilateraaly extend C+T spine

Unilaterally side bend

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11
Q

Semispinalis capitis and cervicis

A

Bilaterally extend C+T spine, stabilize craniovertebral joints
Unilaterally bend C+T spine to same side and rotate to opposite side

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12
Q

Rotators (longus and brevis)

A

Bilaterally extend T spine

Unilaterally rotate spine to opposite side

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13
Q

Levatores costarum (longus and brevis)

A

Bilaterally extend T spine

Unilaterally bend T spine to same side and rotate to opposite side

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14
Q

Multifidus

A

Bilaterally extend spine

Unilaterally bend to same side, rotate to opposite side

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15
Q

Suboccipital triangle - obliquus capitus inferior

A

Bilaterally extend head

Unilaterally rotate head to same side

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16
Q

Suboccipital triangle - obliquus capitis superior

A

Bilaterally extend head and tilt to same side

Unilaterally rotate head to opposite side

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17
Q

Suboccipital triangle - rectus capitus posterior major and minor

A

Bilaterally extend head

Unilaterally rotate head to same side

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18
Q

External intercostals

A

Raise ribs in inspiration, support intercostal spaces, stabilize chest wall

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19
Q

Internal intercostals and innermost intercostals

A

Lower ribs in expiration, support intercostal spaces, stabilize chest wall

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20
Q

Transversus thoracis

A

Weakly lower ribs during expiration

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21
Q

External abdominal oblique

A

Bilaterally flex trunk

Unilaterally side bend to same side and rotate to opposite side

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22
Q

Internal abdominal oblique

A

Bilaterally flex trunk

Unilaterally side bend and rotate to same side

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23
Q

Transversus abdominis

A

Bilaterally compress abdomen

Unilaterally rotate trunk to same side

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24
Q

Rectus abdominis

A

Flex trunk

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25
Psoas major
Hip - flex Lumbar spine - externally rotate Unilaterally side bend Bilaterally raise trunk from supine
26
Psoas minor
Weak trunk flexor
27
Quadratus lumborum
Bilateral bear down in expiration, stabilize 12th rib | Unilaterally side bend
28
Iliacus
Flex thigh (flex pelvis if thigh is fixed)
29
Deltoid (anterior / clavicular)
Flex, internally rotate, adduct arm
30
Deltoid (lateral, acromial)
Abduct arm
31
Deltoid (posterior, spinal)
Extend, externally rotate, adduct arm
32
Pectoralis major
Adduct and internally rotate arm Clavicular and sternocostal parts flex arm and assist with respiration
33
Pectoralis minor
Depress scapula medially, rotate glenoid inferiorly, assist in respiration
34
Latissimus dorsi
Internally rotate, adduct, and extend arm
35
Teres major
Internally rotate, adduct, and extend arm
36
Subscapularis
Internally rotate arm
37
Serratus anterior
Lower arm, rotate scapula laterally, elevate ribs
38
Teres minor
Externally rotate shoulder, weakly adduct
39
Triceps brachii
``` Extend elbow Adduct shoulder (long and medial heads also extend shoulder) ```
40
Anconeus
Extend and stabilize elbow
41
Supraspinatus
Abduct shoulder
42
Infraspinatus
Externally rotate shoulder
43
Biceps brachii
Flex elbow Supinate forearm Flex, abduct, internally rotate shoulder
44
Coracobrachialis
Flex, adduct, internally rotate shoulder
45
Brachialis
Flex elbow
46
Brachioradialis
Weak elbow flexor (most effective w/forearm neutral)
47
Pronator teres
Pronate forearm, weakly flex elbow
48
Flexor carpi radialis
Flex wrist, radial deviation
49
Palmaris longus
Weak elbow flexor, tightens palmar aponeurosis
50
Flexor carpi ulnaris
Flex wrist, ulnar deviation
51
Flexor digitorun superficialis
Wrist flexion MCP and PIP flexion digits 2-5 Weak elvow flexion
52
Flexor pollicus longus
Wrist flexion, radial deviation | Thumb flexion CMC, MCP, IP
53
Flexor digitorum profundus
Wrist flexion | MCP, PIP, DIP flexion digits 2-5
54
Pronator quadratus
Pronation | Stabilize radioulnar joint
55
Extensor carpi radialis longus and brevis
Extend and abduct wrist | Weak elbow flexor
56
Extensor digitorum
Extend wrist | Extend MCP, PIP, DIP digits 2-5
57
Extensor digiti minimi
Extend wrist Extend MCP, PIP, DIP digit 5 Abduct 5th digit
58
Extensor carpi ulnaris
Extend wrist, ulnar deviation
59
Abductor pollicis longus
Abduct wrist and thumb CMC
60
Extensior pollicis brevis
``` Abduct wrist (radial deviation) Thumb CMC, MCP extension ```
61
Extensor pollicis longus
Extend and radially deviate wrist Adduct thumb CMC Extend thumb MCP, IP
62
Extensor indicis
Extend wrist | Extend MCP, PIP, DIP 2nd digit (index finger)
63
Supinator
Supinate forearm
64
Dorsal interossei
Flex MCP and extend PIP, DIP digits 2-4 Abduct digits
65
Palmaris brevis
Tighten palmar aponeurosis
66
Lumbricals
Flex MCP digits 2-5 | Extend PIP, DIP digits 2-5
67
Palmar interossei
Flex MCP digits 2, 4, 5 Extend PIP, DIP digits 2, 4, 5 Adduct digits
68
Adductor pollicis
Adduct thumb CMC | Flex thumb MCP
69
Flexor pollicis longus
Wrist flexion, radial deviation | Thumb CMC, MCP, IP flexion
70
Flexor digitorum superficialis
Wrist flexion Flexion MCP, PIP digits 2-5 Weak elbow flexion
71
Flexor digitorum profundus
Wrist flexion | Flexion MCP, PIP, DIP digits 2-5
72
Abductor pollicis brevis
Abduct thumb CMC
73
Flexor pollicis brevis
Flex thumb CMC
74
Opponens pollicis
Oppose thumb CMC
75
Abductor digiti minimi
Flex and abduct 5th MCP | Extend PIP, DIP 5th digit
76
Flexor digiti minimi brevis
Flex 5th MCP
77
Opponens digiti minimi
Opposition 5th
78
Gluteus maximus
Extend and externally rotate hip | Role in hip abduction and adduction
79
Gluteus medius and minimus
Abduct hip, stabilize pelvis in coronal plane | Role in hip flexion and rotation
80
Piriformis
Hip external rotation, abduction, extension
81
Obturator internus and superior/inferior gemelli
Hip external rotation and extension
82
Quadratus femoris
Hip external rotation and extension
83
Tensor fascia latae
Hip abduction, flexion, internal rotation
84
Sartorius
Hip flexion, abduction, external rotation Knee flexion and internal rotation
85
Rectus femoris
Hip flexion Knee extension
86
Vastus medialis, lateralis, and intermedius
Knee extension
87
Pectineus
Hip adductiob, external rotation, slight flexion
88
Obturator externus
Hip external rotation
89
Gracilis
Hip adduction and flexion Knee flexion and internal rotation
90
Adductor longus
Hip adduction and flexion (up to 70°)
91
Adductor magnus
Hip adduction, extension, slight flexion
92
Adductor brevis
``` Hip adduction and flexion (up to 70°) Hip extension (after 80°) ```
93
Biceps femoris
Knee flexion Hip extension Knee external rotation with knee flexed Hip external rotation with hip extended
94
Semitendinosus and semimembranosus
Knee flexion and internal rotation | Hip extension
95
Tibialis anterior
Ankle dorsiflexion and inversion
96
Extensor digitorum longus
Ankle dorsiflexion and eversion | Extend MCP, IP digits 2-5
97
Extensor hallucis longus
Ankle dorsiflexion | Extend MTP, IP 1st toe
98
Peroneus (fibularis) tertius
Ankle dorsiflexion and eversion
99
Peroneus (fibularis) longus
Ankle plantarflexion and eversion | Arch support
100
Peroneus (fibularis) brevis
Ankle plantarflexion and eversion
101
Gastrocnemius
Ankle plantarflexion | Knee flexion
102
Plantaris
Negligible motion
103
Soleus
Ankle plantarflexion
104
Popliteus
Knee flexion and internal rotation
105
Tibialis posterior
Ankle plantarflexion and inversion | Support MLA and transverse arch
106
Flexor digitorum longus
Ankle plantarflexion and inversion | Flexion MTP, IP digits 2-5
107
Flexor hallucis longus
Ankle plantarflexion and inversion Flexion MTP, IP 1st toe Support MLA
108
Extensor hallucis brevis
Extend 1st MTP
109
Extensor digitorum brevis
Extend MTP, IP digits 2-5
110
Flexor digitorum brevis
Flex MTP, IP digits 2-5 | Support arch
111
Abductor digiti minimi
Flex and abduct 5th MTP | Support MLA
112
Abductor hallucis
Flex and abduct 1st MTP | Support arch
113
Quadratus plantae
Redirect and augment pull of flexor digirorum longus
114
Foot lumbricals
Flex MTP digits 2-5 Extend IP digits 2-5 Adduct digits 2-5 toward 1st toe
115
Adductor hallucis
Flex and adduct 1st MTP | Support transverse arch and MLA
116
Flexor digiti minimi brevis
Flex MTP 5th digit
117
Flexor hallucis brevis
Flex MTP 1st toe | Support arch
118
Foot dorsal interossei
Abduction MTP digits 2-4
119
Foot plantar interossei
Adduct MTP digits 3-5

Anatomy (6 decks)

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