Fluctuat nec mergitur - Free definition results from over 1700 online dictionaries
The radial nerve innervates muscles located in the arm and forearm. In the arm, it directly innervates the three heads of the triceps brachii. This muscle performs extension at the elbow. In the forearm, the deep branch of the radial nerve innervates the muscles in the posterior compartment of the forearm.o enter the forearm, the radial nerve moves anteriorly over the lateral epicondyle of the humerus, through the cubital fossa. Within the forearm, the nerve terminates by dividing into two branches: 1  Deep branch â A motor branch.
In other words, it supplies the following muscles: 1  Extensor carpi radialis brevisâdeep branch of radial nerve. 2  Extensor digitorum. 3  Extensor digiti minimi. 4  Extensor carpi ulnaris. 5  Supinator muscleâdeep branch of radial nerve. 6  Abductor pollicis longus. 7  Extensor pollicis brevis. 8  Extensor pollicis longus. 9  Extensor indicis.