Thumb Anatomy Joints
The thumb joint has two collateral ligaments as well as the capsule which is lined by a synovial membrane. The pip joint is the joint just below the dip joint.
Anatomically the thumb is compromised of the metacarpal connected to the trapezium a carpal bone in the wrist.
Thumb anatomy joints. Break down the words in the name carpometacarpal and you get carpo wrist and metacarpal hand bone. The cmc joint of the thumb is located at the junction point of the thumb and the wrist. There are nine interphalangeal joints in each hand two on each finger and one in the thumb.
The thumb has 2 bones and a metacarpal for an additional 2 joints. Joint capsule of the thumb. The small ringer middle and index fingers all have the same four joints.
Distal interphalangeal joint dip. Proximal interphalangeal joint pip. Interphalangeal joint ip the thumb digit has only two phalanges bones so it only has one joint.
The collateral ligaments are called the anterior and posterior ligaments. This first metacarpal connects to the proximal phalanx. The thumb interphalangeal ip joint is similar to the distal interphalangeal dip joint in the fingers.
The dip joint is located at the tip of the finger. They are responsible for reinforcing the thumb. The ip joint in thumb is located at the tip of the finger just before the fingernail starts.
The three joints are as follows. Three joints of the thumb. Stabilization is done with a combination of bony restraints ligaments and other static soft tissue stabilizers and the dynamic action of muscles.
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