Muscle Motions Chapter 4 HPPP

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17 Terms

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Contraction

Tightening of muscle

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Relaxation

Muscle returns to original form

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Abduction

Movement away from midline

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Adduction

Movement toward midline

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Flexion

Decrease in angle by bending a limb/joint

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Extension

Increasing angle by straightening a limb

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Hyper extension

Over extension of a limb/joint

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Elevation

Raising/lifting a body part

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Depression

Lowering a body part

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Rotation

Circular movement around an axis

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Circumduction

Circular movement at far end of a limb

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Supination

Rotating so that palm or sole of foot is turned foward

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Pronation

Rotating so that palm or sole is facing the back

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Dorsiflexion

bends foot upward at the ankle

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Plantar flexion

bends foot down at ankle

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Medial

internal rotation

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Lateral

external rotation