NCIt definition : A muscle that originates in the humeroulnar and radial heads of the forearm and inserts
in the middle phalanges of the second through fifth digits of the hand; it is primarily
involved in the flexion of the fingers at the proximal interphalangeal joints and
is supplied by the median nerve and the ulnar artery.;
Alternative definition : CDISC: A muscle in the forearm, in general extending from the humeroulnar and radial
heads of the forearm to the middle phalanges of the second through fifth digits of
the hand; primary function is flexion of the fingers at the proximal interphalangeal
joints.;