Wrist & Hand Muscles
The word pollicis refers to the thumb and so the flexor pollicis longus is the long muscle which flexes the thumb!
Flexor Digitorum Superficialis is sometimes also known as Flexor Digitorum Sublimis. It is one of the wrist flexor muscles found in the palm side of the forearm and wrist.
Flexor carpi ulnaris is one of the wrist flexor muscles of the front (palmar) aspect of the forearm. It also helps extensor carpi ulnaris to ulnar deviate the wrist.
Flexor Carpi Radialis crosses the elbow joint and so is also a weak elbow flexor.
The tendon of Extensor Pollicis Longus can be seen on the radial side of the wrist, at the base of the thumb where it forms the lower border of the 'anatomical snuffbox' a triangular shape between two tendons.
Extensor Digitorum Communis is sometimes simply referred to as Extensor Digitorum. It is one of the extensor muscles of the wrist, found in the forearm.
Extensor carpi ulnaris is located on the back (dorsum) of the forearm amongst the other wrist extensors. This is the only muscle responsible for ulnar deviation (moving the hand sideways in the direction of the little finger).
Extensor Carpi Radialis Longus is, as the name suggests, the longer of the two extensor carpi radialis muscles as its origin is the ridge above the lateral epicondyle of the humerus, unlike the other wrist extensors which attach to the epicondyle itself.