label: Flexor Pollicis Longus Muscle
label_lc: flexor pollicis longus muscle
description: "A muscle that originates on the anterior surface of the radius and interosseous membrane and inserts into the palmar aspect of the base of the distal phalanx of the thumb; It is involved in flexion of the thumb and is supplied by the anterior interosseous branch of the median nerve and the radial and anterior interosseous arteries."