This document discusses the muscles of the wrist involved in flexion, extension, abduction, and adduction movements. It contains diagrams and descriptions of the layers of flexor and extensor muscles on the anterior and posterior sides of the wrist. The flexor muscles include the flexor carpi ulnaris, flexor digitorum superficialis, flexor carpi radialis, and flexor digitorum profundus. The extensor muscles include the extensor carpi radialis brevis, extensor digitorum, extensor digiti minimi, and extensor carpi ulnaris. The abductor muscles are the flexor carpi radialis, extensor carpi radialis longus and bre