Transplantation of circadian pacemaker in the house cricket,Acheta domesticusL.

Destruction of neurosecretory cells in the pars intercerebralis of the brain causes the loss of locomotor activity rhythms and creates hyperactivity. When the brain is taken from a rhythmic cricket having both short‐period activity rhythm (S‐PAR) or long‐period activity rhythm (L‐PAR) and is implanted into the abdomen of such an arrhythmic recipient, it produces a characteristic locomotor activity rhythm of the host cricket. The implanted brain has an inhibitory effect on the locomotor activity of a hyperactive and arrhythmic recipient.