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Last updated 3:34 PM on 9/12/23
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126 Terms
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Psoas Major action
Flexes hip
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Illiacus action
Flexes hip
3
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Rectus Femoris action
Hip flexion, knee extension
4
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Vastus Lateralis action
Knee extension
5
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Vastus Medialis action
Knee extension
6
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Vastus Intermedius action
Knee extension
7
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Tibialis Anterior action
Ankle dorsiflexion, foot inversion
8
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Extensor Hallucis Longus action
MP and IP extension of hallux, ankle dorsiflexion
9
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Fibularis Longus action
Foot eversion, ankle plantarflexion (weak)
10
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Fibularis Brevis action
Foot eversion, ankle plantarflexion (weak)
11
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Gastrocnemius action
Ankle plantarflexion, knee flexion
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Soleus action
Ankle plantarflexion
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Anterior Deltoid action
Flexes, internally rotates humerus
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Middle Deltoid action
Abducts humerus
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Posterior Deltoid action
Extends, externally rotates humerus
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Biceps Brachii action
Forearm supination, elbow flexion, shoulder flexion.
17
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Triceps Brachii action
Elbow extension.
18
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Brachioradialis action
Elbow flexion (maximal in mid-pronated position)
19
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Extensor Carpi Radialis Longus action
Wrist extension, radial deviation
20
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Extensor Carpi Radialis Brevis action
Wrist extension, radial deviation
21
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Flexor Carpi Radialis action
Wrist flexion, radial deviation
22
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Abductor Pollicis Brevis action
CMC joint abduction and opposition of 1st digit
23
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Dorsal Interossei action
Abduction of digits 2,3,4 from axial line and assists lumbricals with MP flexion, PIP, distal IP extension.
24
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Sternocleidomastoid action
Bilaterally: Flexes the neck. If cervical vertebrae are fixed, may elevate manubrium and medial clavicles.
Unilaterally: Ipsilateral lateral neck flexion and contralateral rotation.
Unilaterally: Ipsilateral lateral neck flexion and contralateral rotation.
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Flexor Carpi Ulnaris action
Wrist flexion, ulnar deviation
26
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Extensor Carpi Ulnaris action
Wrist extension, ulnar deviation
27
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Abductor Pollicis Longus action
CMC abduction and extension of 1st digit
28
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Extensor Pollicis Longus action
CMC, MP, and IP extension of 1st digit
29
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Extensor Pollicis Brevis action
CMC, MP extension of 1st digit
30
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Gluteus Maximus action
Extends and externally rotates hip
31
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Semitendinosus action
Hip extension, knee flexion, and tibial internal rotation
32
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Semimembranosus action
Hip extension, knee flexion, tibial internal rotation. Retracts medial meniscus.
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Biceps Femoris Long Head action
Hip extension, knee flexion, tibial external rotation
34
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Biceps Femoris Short Head action
Knee flexion, tibial external rotat
35
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Pectoralis Major action
Clavicular head: Flexes, adducts, and internally rotates humerus.
Sternocostal head: Extends from a flexed position, adducts, and internally rotates humerus.
Sternocostal head: Extends from a flexed position, adducts, and internally rotates humerus.
36
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Pectoralis Minor action
Stabilizes scapula by drawing it inferiorly and anteriorly against the thoracic wall
37
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Upper Trapezius action
Elevates, adducts, and upwardly rotates scapula
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Middle Trapezius action
Adducts the scapula
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Lower Trapezius action
Depresses, adducts, upwardly rotates scapula
40
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Serratus Anterior action
Abducts and upwardly rotates scapula; stabilizes the medial border of the scapula against thoracic wall.
41
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Rhomboid Major and Minor action
Adducts, elevates, and downwardly rotates scapula.
42
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Lattisimus Dorsi action
Extends, adducts, and internally rotates humerus.
43
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Coracobrachialis action
Shoulder flexion and adduction
44
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Teres Major action
Extends, adducts, and internally rotates humerus.
45
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Supraspinatus action
Initiates abduction, abducts humerus; depresses and compresses humeral head in glenoid
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Infraspinatus action
Externally rotates humerus; depresses and compresses humeral head in glenoid
47
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Teres Minor action
Externally rotates humerus; depresses and compresses humeral head in glenoid
48
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Supinator action
Forearm supination
49
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Pronator Teres action
Forearm pronation, elbow flexion
50
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Pronator Quadratus action
Forearm pronation. Deep fibers bind radius and ulna together
51
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Tensor Fascia Lata action
Abducts, internally rotates, and flexes hip. Can assist with knee flexion/tension (via its insertion into ITB)
52
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Sartorius action
Hip flexion, abduction, and external rotation, knee flexion, and tibial internal rotation
53
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Gluteus Medius action
Keeps pelvis level when ipsilateral limb is WBing and contralateral limb is NWBing.
Anterior fibers: abduct, flex, and internally rotate the hip.
Posterior fibers: abduct, extend, and externally rotate the hip
Anterior fibers: abduct, flex, and internally rotate the hip.
Posterior fibers: abduct, extend, and externally rotate the hip
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Gluteus Minimus action
Abducts and internally rotates hip
55
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Subscapularis action
Internally rotates humerus; depresses and compresses humeral head in glen
56
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Rectus Capitus Posterior Major and Minor action
Extends head, ipsilateral rotation
57
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Obliqus Capitus Superior action
Extension and lateral flexion of head
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Obliqus Capitus Inferior action
Rotates atlas, turning head ipsilaterally
59
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Platysma action
Draws corners of mouth inferiorly and widens it, draws skin of neck superiorly
60
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Scalenus Anterior action
Neck flexion, elevates 1st rib during forced inspiration
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Scalenus Medius action
Laterally flexes neck; elevates 1st rib during forced inspiration
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Scalenus Posterior action
Laterally flexes neck; elevates 2nd rib during forced inspiration
63
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Longus Colli action
Bilaterally: Flexes neck Unilaterally: Flexes neck, laterally flexes neck, contralateral rotation
64
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Longus Capitus action
Flexes head
65
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Rectus Capitus Anterior action
Flexes head
66
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Rectus Capitus Lateralis action
Flexes and stabilizes head
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Masseter action
Elevates mandible closing jaws; superficial fibers may make limited contribution to protrusion of mandible
68
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Temporalis action
Elevates mandible closing jaws. Posterior fibers are primary retractors of the mandible
69
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Medial Pterygoid action
Elevates mandible, contributes to protrusion; alternate unilateral activity produces smaller grinding movements
70
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Lateral Pterygoid action
Bilaterally: protracts mandible and depresses chin Unilaterally: lateral deviation to the contralateral side Alternate unilateral contraction produces larger lateral chewing movements
71
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Subclavius action
Anchors and depresses clavicle
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Levator Scapulae action
Elevates and downwardly rotates scapula
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Intercostals (Internal/External/Innermost) action
Approximate ribs
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Levator Costarum action
Elevate ribs
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Diaphragm action
Flattens central tendon, increasing vertical diameter of thoracic cavity in inspiration
76
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Rectus Abdominis action
Flexes trunk (lumbar vertebrae) and compresses/supports abdominal viscera. Stabilizes pelvis
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External Obliques action
Flex trunk, laterally flex trunk to ipsilateral side, rotate trunk to contralateral side (with opposite internal oblique). Compresses/supports abdominal viscera
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Internal Obliques action
Flex trunk, laterally flex trunk to ipsilateral side, and rotate trunk to ipsilateral side. Compresses/supports abdominal viscera
79
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Transversus Abdominis action
Compresses/supports abdominal viscera
80
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Pyramidalis action
Tenses the linea alba
81
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Quadratus Lumborum action
Extends and laterally flexes vertebral column. Fixes 12th rib during inspiration
82
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Psoas Minor action
Flexes the pelvis and lumbar vertebral column
83
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Obturator Internus and Gemellus action
Externally rotates extended hip and abducts flexed hip; stabilizes femoral head in acetabulum
84
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Quadratus femoris, Piriformis, and Obturator Externus action
Externally rotates hip; stabilizes femoral head in acetabu
85
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Pectineus action
Hip adduction, flexion, and IR
86
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Adductor Longus action
Hip adduction
87
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Adductor Brevis action
Hip adduction, flexion
88
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Adductor Magnus action
Hamstring portion: Hip adduction and extension Adductor portion: Hip adduction, and flexion
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Gracilis action
Hip adduction, knee flexion, and tibial IR
90
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Articularis Genu action
Pull the synovial membrane superiorly during knee extension
91
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Plantaris action
Weak knee flexion and weak ankle PF
92
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Popliteus action
Tibial IR to “unlock” knee, knee flexion. Retracts lateral meniscus
93
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Extensor Digitorum Longus action
MP, PIP and DIP extension of 2nd-5th digits, ankle DF
94
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Fibularis Tertius action
Ankle DF, foot eversion
95
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Flexor Hallucis Longus action
MP and IP flexion of hallux, weak ankle PF. Supports medial longitudinal arch
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Flexor Digitorum Longus action
MP, PIP, DIP flexion 2nd-5th digits, ankle PF. Supports longitudinal arches of foot
97
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Tibialis Posterior action
Ankle PF, foot inversion
98
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Extensor Digitorum Brevis action
Medial slip: MP extension of hallux Lateral slips: MP, PIP, DIP extension 2nd-4th digits
99
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Abductor Hallucis (1st layer) action
MP abduction and flexion of hallux
100
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Flexor Digitorum Brevis (1st layer) action
MP and PIP flexion of 2nd-5th digits
Note 
Flashcards (130)