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Any movement of the thumb and wrist causes the patient pain, inflammation and swelling. The presence of anomalous or variant muscles in the fourth compartment may result in chronic dorsal wrist pain, a condition known as the fourth compartment syndrome. [4] Intersection syndrome can be caused by direct trauma to the second extensor compartment.
Kienböck's disease is a disorder of the wrist.It is named for Dr. Robert Kienböck, a radiologist in Vienna, Austria who described osteomalacia of the lunate in 1910. [1]It is breakdown of the lunate bone, a carpal bone in the wrist that articulates with the radius in the forearm.
Extensor pollicis longus extends the terminal phalanx of the thumb. While abductor pollicis brevis and adductor pollicis, both attached to the extensor pollicis longus tendon, can extend the thumb's interphalangeal joint to the neutral position, only extensor pollicis longus can achieve full hyperextension at the interphalangeal joint.
Humerus at the anterior of lateral epicondyle (common extensor tendon) [1] Insertion: Posterior base of the 3rd metacarpal [1] Artery: Radial artery: Nerve: Deep branch of the radial nerve: Actions: Extensor and abductor of the hand at the wrist joint [1] Antagonist: Flexor carpi ulnaris muscle: Identifiers; Latin: musculus extensor carpi ...
[10] [11] [12] Other underlying disorders include vasculitides such as polyarteritis nodosa. [8] Other causes of edema include heart failure, hypoalbuminemia, nephrotic syndrome and venous stasis. The key distinguishing feature is that these conditions don't tend to manifest with pitting edema at the back of the hands.
A myotome is the group of muscles that a single spinal nerve innervates. [1] Similarly a dermatome is an area of skin that a single nerve innervates with sensory fibers. Myotomes are separated by myosepta (singular: myoseptum). [2] In vertebrate embryonic development, a myotome is the part of a somite that develops into muscle.
The extensor indicis proprius usually runs and inserts onto the ulnar side of the extensor digitorum communis of the index finger. [4] The fifth compartment is occupied by the extensor digiti minimi, the extensor of the little finger. The extensor carpi ulnaris passes through the sixth compartment to insert to the base of the fifth metacarpal bone.
Wrist drop is a medical condition in which the wrist and the fingers cannot extend at the metacarpophalangeal joints. The wrist remains partially flexed due to an opposing action of flexor muscles of the forearm. As a result, the extensor muscles in the posterior compartment remain paralyzed.