Flexor Pollicis Longus
Hand
Unique to humans — most primates don't have a separate FPL, which is part of why our thumbs are so dexterous.
Function
Flexes IP joint of thumb
Origin
Anterior surface of radius and interosseous membrane
Insertion
Base of distal phalanx of thumb
Innervation
Anterior interosseous nerve (C8-T1)