Opposition Anatomy Definition

The relation between the thumb and the other digits of the hand for the purpose of grasping objects between the thumb and fingers. How to use opposition in a sentence.

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It has been said that human civilization depends upon the opposition of the thumb.

Opposition anatomy definition. During opposition the thumb is rotated around its long axis. Sellar joint this movement is called opposition ie of thumb to fingers. Opposition definition is a configuration in which one celestial body is opposite another such as the sun in the sky or in which the elongation is near or equal to 180 degrees.

Protraction and retraction refer to an anterior protraction or posterior retraction movement such as of the arm at the shoulders although these terms have been criticised as non specific. Reciprocal motion is alternating motions in opposing directions. Dictionary thesaurus legal acronyms idioms encyclopedia wikipedia.

Opposition is the thumb movement that brings the tip of the thumb in contact with the tip of a finger. Opposition brings the thumb and little finger together. A pair of movements that are limited to humans and some great apes these terms apply to the additional movements that the hand and thumb can perform in these species.

This movement is produced at the first carpometacarpal joint which is a saddle joint formed between the trapezium carpal bone and the first metacarpal bone. Opposition is the movement that involves grasping of the thumb and fingers.

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