Synergists - muscles working together

Wrist - Radiocarpal joint

Extension

          Extensor carpi radialis longus
          Extensor carpi radialis brevis
          Extensor carpi ulnaris
          Extensor digitorum
         
Flexion 

          Flexor carpi radialis
          Flexor carpi ulnaris
          Palmaris longus
          Flexor digitorum superficialis
          Flexor carpi radialis

Adduction (ulnar diviation)

          Extensor carpi radialis longus
          Extensor carpi radialis brevis
          lexor carpi radialis

Adduction (ulnar diviation)

          Extensor carpi ulnaris
          Flexor carpi ulnaris