Synergists - muscles working together

Hand and fingers  - metacarpophalageal, proximal and distal interphalangeal joints


Flexion of the second - fifth fingers

          Flexor digitorum superficialis
          Flexor digitorum profundus
          Flexor digiti minimi brevis 5th
          Lumbricals
          Dorsal interossei 2nd - 4th
          Palmar interossei 2nd, 4th, and 5th 
         
Extension of the second through fifth fingers

          Extensor digitorum
          Extensor indicis 2nd
          Lumbricals
          Dorsal interossel 2nd - 4th
          Palmar interossei 2nd, 4th and 5th