To test whether the known connectivies of neurons in the lamprey spinal cord are sufficient to account for locomotor rhythmogenesis, a CCconnection(cid:173) ist" neural network simulation was done using identical cells connected ac(cid:173) cording to experimentally established patterns. It was demonstrated that the network oscillates in a stable manner with the same phase relation(cid:173) ships among the neurons as observed in the lamprey. The model was then used to explore coupling between identical