<P> It is in the anterior compartment of the forearm . It is sometimes considered to be the deepest part of the superficial layer of this compartment, and sometimes considered to be a distinct, "intermediate layer" of this compartment . It is relatively common for the Flexor digitorum superficialis to be missing from the little finger, bilaterally and unilaterally, which can cause problems when diagnosing a little finger injury . </P> <P> The muscle has two classically described heads - the humeroulnar and radial - and it is between these heads that the median nerve and ulnar artery pass . The ulnar collateral ligament of elbow joint gives its origin to part of this muscle . </P> <P> Four long tendons come off this muscle near the wrist and travel through the carpal tunnel formed by the flexor retinaculum . These tendons, along with those of flexor digitorum profundus, are enclosed by a common flexor sheath . The tendons attach to the anterior margins on the bases of the intermediate phalanges of the four fingers . These tendons have a split (Camper's Chiasm) at the end of them through which the tendons of flexor digitorum profundus pass . </P> <P> The Flexor digitorium superficialis muscle is innervated by the median nerve (C7, C8, T1). </P>

Where does the flexor digitorum superficialis distally attach