Thumb Bone Anatomy

Anatomy of the fingers finger bones. The finger bones as shown in the figure above are.

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Anatomically the thumb is compromised of the metacarpal connected to the trapezium a carpal bone in the wrist.

Thumb bone anatomy. Each metacarpal has a base which articulates with the carpals and a head which articulates with the finger bones clinically known as the phalanges to form the knuckles. One row connects with the ends of the bones in the forearm radius and ulna. Above the metacarpals below the knuckle.

This first metacarpal connects to the proximal phalanx. The wrist links the hand to the arm. The thumb connects with a bone in the hand first metacarpal.

The carpal bones are arranged in 2 interrelated rows. The fifth metacarpal is on the medial side just under your pinkie finger. Anatomy of the hand and wrist.

Having a dorsal surface that features hair and a nail and a hairless palmar aspect with fingerprint ridges. There are two interphalangeal joints ip joints on each finger. The thumb has two bones.

The finger bones are known as phalanges singular phalanx. This connects to the thumbs distal phalanx which is also the tip of the digit. The flexor pollicis brevis tendon and the adductor pollicis attach to the thumb sesamoids.

Having a skeleton of phalanges joined by hinge like joints that provide flexion toward the palm of the hand. Nerves send signals from the brain to the. The first bone distal phalange extends from the tip of the thumb to the knuckle.

Just above the knuckle. Unlike fingers the thumb does not possess an intermediate phalanx bone. The wrist is a complex mechanical system of 8 small bones known as the carpal bones.

The first metacarpal is on the lateral or thumb side of your hand. The thumb sesamoids are two small round bones at about the level of the thumb metacarpophalangeal joint these bones as with all sesamoid bones lie within tendons. The second bone proximal phalange extends from the knuckle to the base of the thumb.

The thumb shares the following with each of the other four fingers. This is the area of webbing between the thumb and the first finger. Bones muscles tendons nerves.

Ask a doctor online now. Nerves of the fingers.

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