Is A Thumb A Finger Or A Joint The Intriguing Anatomy Of The Thumb

Found in the fingers and thumb. Each finger has two ip joints: Proximal interphalangeal (pip) and distal interphalangeal (dip). The thumb has one ip joint. Summary the ip joint of the thumb contributes flexion, extension, and a small amount of pronation to thumb motion.

In anatomical terms, a thumb is considered a finger, as it shares similar characteristics with the four other digits on the hand, such as having bones, joints, and nail. It differs from other digits in having only two phalanges (tubular bones of the fingers and toes). Why is a thumb not a finger? The thumb is distinct from fingers due to its unique structure and function in human anatomy. The anatomy of the hand. The human hand is an incredible. The thumb is located on the radial (lateral) side of the hand, positioned opposite the other four fingers. It extends from the base of the hand, originating at the carpometacarpal. The thumb is known to be the outermost finger of the 5 fingers of the hand. It is capable of unique and amazing motions that make it completely different from the other fingers of a human hand.