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Muscle Actions
Upper Extremety/ Lower Extremity
| Question | Answer |
|---|---|
| biceps brachii | flexes and supinates forearm at elbow joint; flexes arm at shoulder joint |
| coracobrachialis | flexes and adducts arm at shoulder joint |
| deltoid | abducts, flexes, extends, and rotates arm at shoulder joint |
| infraspinatus | rotates arm laterally at shoulder joint |
| latissimus dorsi | extends,adducts, and rotates arm medially at shoulder joint; draws arm downward and backward |
| pectoralis major | adducts and rotates arm medially at shoulder joint; flexes and extends arm at shoulder joint |
| subscapularis | rotates arm medially at shoulder joint |
| supraspinatus | assists deltoid muscle in abducting arm at shoulder joint |
| teres major | extends arm at shoulder joint; assists in adduction and rotation of arm medially at shoulder joint |
| teres minor | rotates arm laterally and extends arm at shoulder joint |
| triceps brachii | extends forearm at elbow joint; extends arm at shoulder joint |
| brachialis | flexes forearm at elbow joint |
| brachioradialis | flexes forearm at elbow joint |
| extensor carpi radialis longus | extends and abducts hand at wrist joint |
| extensor carpi ulnaris | extends and adducts hand at wrist joint |
| extensor digitorum | extends hand at wrist joint; extends phalanges of each finger |
| flexor carpi radialis | flexes and abducts hand at wrist joint |
| flexor carpi ulnaris | flexes and adducts hand at wrist joint |
| flexor digitorum profundus | flexes hand at wrist joint; flexes phalanges of each finger |
| flexor digitorum superficialis | flexes hand at wrist joint; flexes phalanges of each finger |
| palmaris longus | weakly flexes hand at wrist joint |
| pronator teres | pronates forearm |
| supinator | supinates forearm |
| adductor brevis | adducts, medially rotates, and flexes hip |
| adductor longus | adducts, rotates, and flexes thigh at hip joint |
| adductor magnus | adducts, flexes, rotates and extends thigh at hip joint |
| biceps femoris (hamstring) | flexes leg at knee joint; extends thigh at hip joint |
| gluteus maximus | extends and rotates thigh laterally at hip joint; helps lock knee in extension |
| gluteus medius | abducts and rotates thigh medially at hip joint |
| gluteus minimus | abducts, medially rotates, and flexes the hip joint |
| gracilis | adducts and medially rotates thigh at hip joint; flexes leg at knee joint |
| iliacus | flexes and rotates thigh laterally at hip joint; flexes vertebral column |
| pectineus | flexes and adducts thigh at hip joint |
| piriformis | rotates thigh laterally and abducts it at hip joint |
| psoas major | flexes and rotates thigh laterally at hip joint; flexes vertebral column |
| rectus femoris (quadriceps) | extends leg at knee joint; flexes thigh at hip joint |
| sartorius | weakly flexes leg at knee joint; flexes, abducts, and laterally rotates thigh at hip joint, thus crossing leg |
| semimembranosus (hamstring) | flexes leg at knee joint; extends thigh at hip joint |
| tensor fasciae latae | flexes and abducts thigh at hip joint |
| extensor digitorum longus | dorsiflexes and everts foot; extends toes |
| fibularis longus (peroneus longus) | plantar flexes and everts (pronates) foot |
| flexor digitorum longus | plantar flexes foot; flexes toes |
| gastrocnemius | plantar flexes foot; flexes leg at knee joint |
| soleus | plantar flexes foot |
| tibialis anterior | dorsiflexes and inverts (supinates) foot |
| tibialis posterior | plantar flexes and inverts foot |
| vastus intermedius (quadriceps) | extends leg at knee joint |
| vastus lateralis (quadriceps) | extends leg at knee joint |
| vastus medialis (quadriceps) | extends leg at knee joint |
| semitendinosus (hamstring) | flexes leg at knee joint; extends thigh at hip joint |
Created by:
edwardmcbiggins
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