Thumb Anatomy Joints

The small ringer middle and index fingers all have the same four joints. Joint capsule of the thumb.

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The dip joint is located at the tip of the finger.

Thumb anatomy joints. Stabilization is done with a combination of bony restraints ligaments and other static soft tissue stabilizers and the dynamic action of muscles. The cmc joint of the thumb is located at the junction point of the thumb and the wrist. The three joints are as follows.

The thumb joint has two collateral ligaments as well as the capsule which is lined by a synovial membrane. The collateral ligaments are called the anterior and posterior ligaments. The ip joint in thumb is located at the tip of the finger just before the fingernail starts.

Anatomically the thumb is compromised of the metacarpal connected to the trapezium a carpal bone in the wrist. The pip joint is the joint just below the dip joint. The thumb interphalangeal ip joint is similar to the distal interphalangeal dip joint in the fingers.

There are nine interphalangeal joints in each hand two on each finger and one in the thumb. Interphalangeal joint ip the thumb digit has only two phalanges bones so it only has one joint. Break down the words in the name carpometacarpal and you get carpo wrist and metacarpal hand bone.

This first metacarpal connects to the proximal phalanx. The thumb has 2 bones and a metacarpal for an additional 2 joints. They are responsible for reinforcing the thumb.

Proximal interphalangeal joint pip. Distal interphalangeal joint dip. Three joints of the thumb.

Muscles Of The Thumb Wikipedia