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origin

attached to the immovable or less moveable bone

insertion

attached to the moveale bone and when the muscle contracts the insertion moves toward the origin

flexion

act of bending a joint

extension

act of stretching or straightening out a flexed limb

rotation

a single complete turn (axial or orbital)

abduction

moving of a body part away from the midline of the body

adduction

movement of a body part towards the midline of the body

circumduction

A circular movement of a limb or eye

dorsiflexion and plantar flexion

up and down movements of the foot at the ankle

inversion and eversion

movements of the sole of the foot medially or laterally

supination and pronation

movement of radius around ulna (supination: turning backward) (pronation: turning forward)

opposition

Movement of the thumb to touch the fingertips

prime mover

muscle that has the principal responsibility for a given movement

antagonist

a muscle that relaxes while another contracts

synergist

a muscle that assists the Prime mover

fixators

muscles that stabilize proximally to allow agonist to work effectively

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