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Superficial group of the ant. ...
The superficial muscles of the anterior antebrachium share a common origin on the medial epicondyle of the humerus, where they diverge from a common tendon. These muscles form the bulging profile on the medial side of the forearm when the wrist is flexed. With the exception of the pronator teres, all these muscles pass into the wrist and hand where they share the common function of wrist flexion. Notice that the flexor digitorum superficialis sits just deep to the other muscles in this group. As it passes onto the digits its tendons split to allow the deep digital flexor to pass from beneath it. As an interesting tidbit of information, the highly variable palmaris longus is absent in approximately twenty-five percent of the population. Study these muscles and then feel for the presence or absence of your own palmaris longus.