The main hand extensor muscle is called the Extensor Digitorum, and it's one of several wrist extensor muscles found in the outer portion of your forearm. Extends toes 2-5.. The extensor digitorum longus muscle is located at the front of the leg and is adjacent to the peroneus brevis muscle and the tibialis anterior muscle. Extension of the toes involves raising the toes up. Extends lateral four digits and dorsiflexes the ankle. Extensor digitorium longus tends to be overactive and tight for an inhibited Tibialis anterior, so stretching and myofascial release of the muscle together with activation tibialis anterior is indicated to regain muscle balance. (L4, L5). To test the function of the muscle, the forearm is pronated, and the fingers extended against resistance. Need some extra support learning the forearm extensor muscles? Origin : The extensor hallucis brevis originates from the calcaneus, the interosseous talocalcaneal ligament, and the inferior extensor retinaculum. The main function of the Extensor Digitorum is to extend your hand at your wrist and to extend all the joints of your fingers. THIS SET IS OFTEN IN FOLDERS WITH... Flexor Digitorum Superficialis. Extensor Digitorum: The extensor digitorum muscle is the main extensor of the fingers. extension of wrist joint with continued action. Action. Extensor expansion of middle and distal phalanges of the 2nd, 3rd, 4th, and 5th fingers. The Xs in the picture below display common areas of trigger points in â¦ Action. The extensor hallucis brevis is lateral to extensor hallucis longus and medial to the extensor digitorum longus. Additionally, it facilitates extension of the fingers II through V. The extensor digitorum muscle runs from the lateral epicondyle of the humerus down the entire length of the forearm and splits at the wrist into 4 tendons that run to the 2nd â 5th finger. The extensor digitorum has two main actions. â¦ The fifth digit, lacking any insertion from extensor digitorum brevis, can only be raised by the long extensor . The extensor digitorum muscle (also known as extensor digitorum communis) is a muscle of the posterior forearm present in humans and other animals. Wiki. Extensor Digitorum actions - wrist joint. Extensor digitorum brevis extends the first four digits at the metatarsophalangeal joint and assists in extending the second, third and fourth digits at the interphalangeal joint. This muscle extends the second through fifth toes, and it dorsiflexes the foot through the ankle joint. Insertion: It splits into four, and inserts into the extensor hood [â¦] 1 The function of the Extensor Digitorum Muscle is to facilitate movements of the wrists and elbows. Extends fingers/wrist. Extensor Digitorum actions - hand. extension of MP, PIP, DIP joints of digits 2-5, abduction of MP joints unless resisted by synergistic muscles. The Extensor Digitorum Muscle which is also known by the name of Extensor Digitorum Communis muscle is an important muscle, which is located behind the forearm. Actions of Extensor Digitorum Longus on the foot: a. An extensor expansion (dorsal expansion, dorsal hood, dorsal aponeurosis) is the special connective attachments by which the extensor tendons insert into the phalanges. Deep peroneal nerve, a branch of the common peroneal nerve. Origin: Originates from the lateral epicondyle. It extends the medial four digits of the hand. It originates at your elbow and runs down to your four fingers. 7 â¦ Attachment Points of the Extensor Digitorum. The tendon continues into the distal part of the forearm. This wing-shaped muscle works to â¦ Nerve Supply. Insertion : The muscle inserts to the base of the proximal phalanx of the great toe. Extensor digitorum is innervated by the posterior interosseous nerve, which is â¦ 2.