Thumb Bone Anatomy

The first bone distal phalange extends from the tip of the thumb to the knuckle. This first metacarpal connects to the proximal phalanx.

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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.

Thumb bone anatomy. The wrist links the hand to the arm. Anatomically the thumb is compromised of the metacarpal connected to the trapezium a carpal bone in the wrist. The first metacarpal is on the lateral or thumb side of your hand.

Bones muscles tendons nerves. The thumb shares the following with each of the other four fingers. The flexor pollicis brevis tendon and the adductor pollicis attach to the thumb sesamoids.

Just above the knuckle. Unlike fingers the thumb does not possess an intermediate phalanx bone. Nerves of the fingers.

Anatomy of the hand and wrist. One row connects with the ends of the bones in the forearm radius and ulna. The finger bones are known as phalanges singular phalanx.

Having a skeleton of phalanges joined by hinge like joints that provide flexion toward the palm of the hand. The thumb connects with a bone in the hand first metacarpal. 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.

There are two interphalangeal joints ip joints on each finger. Anatomy of the fingers finger bones. The carpal bones are arranged in 2 interrelated rows.

This connects to the thumbs distal phalanx which is also the tip of the digit. Ask a doctor online now. The thumb has two bones.

The fifth metacarpal is on the medial side just under your pinkie finger. The wrist is a complex mechanical system of 8 small bones known as the carpal bones. The second bone proximal phalange extends from the knuckle to the base of the thumb.

The finger bones as shown in the figure above are. Above the metacarpals below the knuckle. Having a dorsal surface that features hair and a nail and a hairless palmar aspect with fingerprint ridges.

Nerves send signals from the brain to the. This is the area of webbing between the thumb and the first finger.

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