The forearm is divided into anterior and posterior compartments. The muscles of the anterior compartment, also known as the flexor-pronator muscles, are divided into two parts: Superficial part: Pronator teres, flexor carpi radialis, flexor carpi ulnaris, palmaris longus and flexor digitorum superficialis muscles. Deep part: Flexor digitorum profundus, flexor pollicis longus and pronator quadratus muscles. These muscles act on different joints of the upper limb, enabling movements of the forearm