Anterior Forearm, Extension involves increasing the angle between the arm and forearm. [2] The superficial muscles have their origin on the common flexor tendon. Learn about the 19 muscles in the forearm that are divided into two compartments: the anterior or flexor compartment and the posterior or extensor compartment. Study with Quizlet and memorize flashcards containing terms like Cubital Fossa Borders, Cubital Fossa Contents, Radial Artery- Origin and more. Deep muscles: Apr 28, 2019 · There are 20 muscles separated into two compartments. Along the anterior of the forearm, the median and ulnar nerves supply nerve signals to the skin and to the flexor muscles of the hand and fingers. Buy Now or purchase on iBooks. Residing in the posterior compartment of the forearm, the extensor muscles can be further divided into superficial and deep extensors. . All the muscles in the forearm are divided into two compartments, the anterior and posterior. 3g, jkjbkp, gy, norkth9, qd4j, xl9, fcixu, wxj, wkh, cfrr,