The major muscles around the wrist and forearm are labeled, including flexor carpi radialis, flexor carpi ulnaris, palmaris longus, extensor carpi radialis longus, extensor carpi radialis brevis, extensor carpi ulnaris, flexor digitorum superficialis, and extensor digitorum. The primary pain area is marked on the extensor carpi radialis brevis on the lateral wrist, and secondary discomfort is marked on the flexor carpi ulnaris on the medial side. See more