The forearm, wrist, and hand muscles are made up pf the pronator teres, pronator quadratus, supinator, flexor carpi radialis, flexor carpi ulnaris, palmaris longus, flexor digitorum, superficialis, flexor digitorum profundis, extensor carpi redialis longus and brevis, extensor carpi ulanris, extensor digitorum, extensor digiti minimi, extensor indicis, extensor pollicis longus and brevis, flexor pollicis longus and brevis, opponens pollicis, abductor pollicis longus and brevis, flexo digiti minimi brevis, abductor digiti minimi, opponens digiti minimi, and biceps brachii.

The pronator teres comes from the Latin roots meaning downward round, and its origin is in the humerus' medial epicondyle and the corodnoid process. The insertion is found in the radial shaft's proximal end. The action is where the forearm is pronated and the elbow flexes, and the nerve is the median nerve.

The pronator quadratus comes from the Latin root "pronus" which means downward and "quadratus" which means four-sided. The origin and the insertion on the ulnar shaft are on one eight of the anterior distal end. The action is pronated on the forearm, and the nerve is the medial nerve.

The supinator comes from the Latin root meaning to bend backward, and its origins are on the humerus' lateral epicondyle, the proximal one eight of ulnar shaft, the radial collateral ligament, and the annular ligament. Its insertion is located at the proximal lateral radial shaft, and the place of action is the forearm where it supinates. The nerve for this muscle is the radial nerve.