Thumb - Wikipedia - human anatomy thumb


human anatomy thumb - Hand - Wikipedia

Apr 14,  · The thumb is the first of the hand's five digits, but it is typically not referred to as a finger. The thumb possesses a unique and wide range of motion not shared by the hand's other digits. Thumb, short, thick first digit of the human hand and of the lower-primate hand and foot. It differs from other digits in having only two phalanges (tubular bones of the fingers and toes). The thumb also differs in having much freedom of movement and being opposable to tips of other digits. The.

The thumb is the first digit (finger) of the a person is standing in the medical anatomical position (where the palm is facing to the front), the thumb is the outermost digit. The Medical Latin English noun for thumb is pollex (compare hallux for big toe), and the corresponding adjective for thumb Artery: Princeps pollicis artery. Fingers have a complex anatomy. Each finger has 3 phalanges (bones) and 3 hinged joints; the thumb has two of each. Ligaments connect finger bones and help keep them in place. Tendons connect muscles to bones. Finger movement is controlled by muscles in .

Mar 24,  · The joint capsule of the thumb is fibrous and durable, and allows for great mobility. There are nine interphalangeal joints in each hand, two on each finger and one in the thumb. The thumb . Extensor pollicis longus: This tendon also travels along the back of the thumb and helps straighten the thumb, but it connects the muscle in the back of the forearm to the bone at the tip of the thumb. Learn more about anatomy of the fingers, hand, wrist, arm and shoulder at