Flexor Pollicis Longus

Flexor Pollicis Longus Muscle

The word pollicis refers to the thumb and so the flexor pollicis longus is the long muscle which flexes the thumb!

Origin - Middle anterior surface of the radius.  

Insertion - Base of the distal phalanx of the thumb.  

Actions - Flexion of the thumb.
Flexion of the wrist.

Innervation - Anterior interosseous nerve.  

Daily uses - Gripping something tightly.

Example strengthening exercises - Wrist flexion using a dumbbell.  

Example stretches - Wrist flexor stretch.  

Related muscles - Extensor pollicis longus.
Flexor digitorum superficialis.