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In the context of anatomy and physiology, opposition is the movement that involves bringing the thumb and a finger (usually the little or index finger) together. This action allows for gripping and manipulating objects of various sizes.
The bending movement around a joint in a limb that decreases the angle between the bones of that limb.
The straightening movement that increases the angle between body parts, such as straightening an arm or leg.
The movement of a limb away from the midline or center line of the body