Your forearm anatomy includes 20 muscles, ranging from the extensor carpi radialis longus to the abductor pollicis longus. One of the largest is the brachioradialis, which helps to bend your elbow.

Your arm muscles allow you to perform hundreds of everyday movements, from making a fist to bending your thumb. ... Anatomy and Physiology.(2013). https: ...

Forearm muscles and anatomy. Anatomy, Shoulder and Upper Limb, Forearm Muscles divide the forearm muscles into two muscular compartments — anterior (flexor) and posterior (extensor).