actions of muscles
Popularity (by total correct streak): 7
Popularity (by number of users): 10
| tibialis anterior | inversion of the foot; dorsiflexion of the talocrural joint | |
| soleus | plantarflexion of the talocrural joint | |
| gastrocnemius | flexion of the tibiofemoral joint | |
| hamstrings | (all) flexion of the tibiofemoral joint; (biceps femoris) lateral rotation of the coxal joint, lateral rotation of the flexed tibiofemoral joint; (semitendinosus and semimembranosus) medial rotation of the coxal joint, medial rotation of the flexed tibiofemoral joint | |
| quadriceps femoris | (all) extension of the tibiofemoral joint; (rectus femoris) flexion of the coxal joint | |
| serratus anterior | abduction of the scapula, depression of the scapula, holding the medial border of the scapula against the rib cage; (if scapula is stabilized) may act in forced inhalation | |
| pectoralis minor | depression, abduction of the scapula; tilting the scapula anteriorly; (if scapula is fixed) assist in forced inhalation | |
| rhomboid major | adduction, elevation, and downward rotation of the scapula | |
| rhomboid minor | adduction, elevation, downward rotation of the scapula | |
| trapezius | (upper fibers, bilateral) extension of the head and neck; (unilateral) lateral flexion, rotation, elevation, and upward rotation of the scapula; (middle fibers) adduction and stabilization of the scapula; (lower fibers) depression and upward rotation of the scapula | |
| levator scapula | (unilateral) elevation, downward rotation, lateral flexion, and rotation of the head and neck | |
| subscapularis | medial roation of the glenohumeral joint; stabilization of the head of the humerus in the glenoid cavity | |
| teres minor | lateral rotation, adduction, extension, and horizontal adduction of the glenohumeral joint; stabilization of the head of the humerus in the glenoid cavity | |
| infraspinatus | lateral rotation, adduction, extension, and horizontal abduction of the glenohumeral joint; stabilization of the head of the humerus in the glenoid cavity | |
| supraspinatus | abduction of the glenohumeral joint; stabilization of the head of the humerus in the glenoid cavity | |
| latissimus dorsi | extension, adduction, and medial rotation of the glenohumeral joint | |
| pectoralis major | (all fibers) adduction and medial rotation of the glenohumeral joint; (upper fibers) flexion and horizontal adduction of the glenohumeral joint; (lower fibers) extension of the glenohumeral joint | |
| deltoid | (all fibers) abduction of the glenohumeral joint; (anterior fibers) flexion, medial rotation, horizontal adduction of the glenohumeral joint; (posterior fibers) extension, lateral rotation, horizontal abduction of the glenohumeral joint | |
| triceps brachii | (all heads) extension of the humeroulnar joint; (long head) extension and adduction of the glenohumeral joint | |
| biceps brachii | flexion of the humeroulnar joint; supination of the forearm; flexion of the glenohumeral joint | |
| scalenes | (bilateral) elevate the ribs during inhalation, (anterior) flexion of the head and neck; (unilateral) with rib fixed, lateral flexion of the head and neck to the same side, rotation of the head and neck to the opposite side | |
| sternocleidomastoid | (unilateral) lateral flexion of the head and neck to the same side, rotation of the head and neck to the opposite side; (bilateral) flexion of the neck, assist in inhalation | |
| erector spinae | (bilateral) extension of the vertebral column; (unilateral) lateral flexion of the vertebral column to the same side | |
| rectus abdominis | flexion of the vertebral column | |
| internal oblique | (bilateral) flexion of the vertebral column, compression of the abdominal contents; (unilateral) lateral flexion of the vertebral column to the same side, rotation of the vertebral column to the same side | |
| external oblique | (bilateral) flexion of the vertebral column, compression of abdominal contents; (unilateral) lateral flexion of the vertebral column to the smae side, rotation of the vertebral column to the opposite side | |
| quadratus lumborum | (unilateral) lateral tilt of the pelvis, lateral flexion of the vertebral column to the same side; (bilateral) assist in extension of of the vertebral column | |
| gluteus maximus | (all fibers) extension, lateral rotation, and abduction of the coxal joint; (lower fibers) adduction of the coxal joint | |
| iliopsoas | flexion, lateral rotation, adduction of the coxal joint | |
| piriformis | lateral rotation of the coxal joint, abduction of the thigh when the coxal joint is flexed | |
| gluteus medius | (all fibers) abduction of the coxal joint; (anterior fibers) flexion and medial rotation of the coxal joint; (posterior fibers) extension and lateral rotation of the coxal joint | |
| tensor fascae latae | flexion, medial rotation, abduction of the coxal joint | |
| tibialis posterior | inversion of the foot; plantarflexion of the talocrural joint | |
| peroneus longus | eversion of the foot; assist in plantarflexion of the talocrural joint | |
| extensor digitorum longus | extension of second to fifth toes; dorsiflexion of the talocrural joint; eversion of the foot | |
| extensor digitorum | extension of the second through fifth fingers; assist to extend the radiocarpal joint | |
| flexor carpi radialis | flexion and abduction of the radiocarpal joint; flexion of the humeroulnar joint |
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