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MUSCLE ACTIONS
Question | Answer |
---|---|
MASSETER | elevates mandible |
TEMPORALIS | elevates mandible |
STERNOCLEIDOMASTOID | FLEXION, LATERAL FLEXION, ROTATION flexion if bilateal contraction; lat flex & rot if unilateral OF HEAD/NECK |
DIAPHRAGM | primary muscle of inspiration |
RHOMBOID MINOR/MAJOR | retraction of pectoral girdle |
PECTORALIS MINOR | depression, protraction of pectoral girdle |
LATISSIMUS DORSI | ext, add, int. rot. Of the arm/ brachium |
PECTORALIS MAJOR | flex, add, int. rot. Of the arm/brachium |
SUPRASPINATUS | abd of the arm/brachium. Contraction of all 4 rotator cuff (muscles move together) |
INFRASPINATUS | ext rot of the arm/ brachium. Act to stabilize head of humerus |
TERES MAJOR | add, ext rot of the arm/brachium |
BICEPS BRACHII | flexion, supination of the forearm. Also causes slight flexion at shoulder |
BRACHIORADIALIS | flexion of the forearm |
PRONATOR TERES | pronation of the forearm |
TRICEPS BRACHII | extension of the forearm. Also helps extend at shoulder (long head only) |
PALMARIS LONGUS | flexion of the wrist/fingers. Minimal movement at wrist only |
GLUTEUS MAXIMUS | ext of the thigh. Also helps tense iliotibial band to laterally support knee |
GLUTEUS MEDIUS | abd of the thigh |
TENSOR FASCIAE LATAE (TFL) | flex, abd, int rot of the thigh. Tenses iliotibial band to laterally support knee |
GRACILIS | add of the thigh. Also causes knee flexion |
ADDUCTOR LONGUS | flex, add, int rot of the thigh. |
SARTORIUS | flex, ext rot of the thigh/leg. Flexes & ER at hip & flexes knee |
RECTUS FEMORIS | flex, ext of thigh/leg. Flexes at hip & extends at the knee |
VASTUS MEDIALIS | ext of the thigh/leg. Movement at knee only |
VASTUS LATERALIS | ext of the thigh/leg. Movement at knee only |
VASTUS INTERMEDIUS | ext of the thigh/leg. Movement at knee only |
BICEPS FEMORIS | flex, ext of the thigh/leg. Extends at hip & flexes knee; short head only knee flexion |
SEMITENDINOSUS | flex, ext of the thigh/leg. Extends at hip & flexes knee. |
SEMIMEMBRANOSUS | flex, ext of the thigh/leg. Extends at hip & flexes knee. |
TIBIALIS ANTERIOR | dorsiflex, inversion of the ankle/foot/toes |
PERONEUS (FIBULARIS) LONGUS | plantarflex, eversion of the ankle/foot/toes |
GASTROCNEMIUS | plantarflex of the ankle/foot/toes. also flexes knees |
SOLEUS | plantarflexof the ankle/foot/toes |