This is a reliable diagnostic test. Percuss lightly over the flexor retinaculum with a tendon hammer, particularly between the palmaris longus tendon and the flexor carpi radialis tendons. The test is ...

This one is not so much some you have as something you don't. The palmaris longus is a vestigial tendon in the forearm. Its purpose varies in the animal kingdom, some use it to draw back their ...