Flexor digitorum superficialis ( flexor digitorum sublimis ) is an extrinsic flexor muscle of the fingers at the proximal interphalangeal joints.

Actions The flexor pollicis longus is a flexor of the phalanges of the thumb when the thumb is fixed, it assists in flexing the wrist.

The deep (medial) part of the flexor brevis pollicis is sometimes described as the first palmar interosseous muscle.

In anatomy, flexor carpi radialis is a muscle of the human forearm that acts to flex and (radial) abduct the hand.

The flexor carpi ulnaris (FCU) muscle is a muscle of the human forearm that acts to flex and adduct the hand.