FLEXOR POLLISIS LONGUS :
FLEXOR POLLICIS LONGUS :
The anterior interosseous nerve and the anterior interosseous artery and vein pass downward on the front of
the interosseous membrane between the flexor pollicis longus and flexor digitorum profundus.
humans are unique among hominids in having a flexor pollicis longus
(FPL) muscle belly that is separate from that of the flexor digitorum profundus.
While the FPL is not a separate muscle belly in extant great apes, a distinct tendon from the flexor digitorum profundus belly might be present or not.
In some individuals this tendon tend to act more like a ligament
which restricts extension of the interphalangeal joint of the thumb.
Origin :The middle 2/4 of the anterior surface of the radius and the adjacent interosseus membrane
Insertion : base of the distal phalanx of the thumb
Nerve Supply : anterior introssious nerve
Action/Exercise : flexion of the thumb