Hormonal Release of Stereotyped Motor Programmes from the Isolated Nervous System of the Cecropia Silkmoth

摘要: 1.In the moth Hyalophora cecropia, injection of eclosion hormone into pre-emergence (pharate) animals releases a stereotyped series behaviours that assist in escaping from pupal cuticle and cocoon. The preeclosion behaviour begins 15 min after lasts for 60 min. first 30 is an active period consisting frequent abdominal rotations; quiet follows. This followed by which consists rhythmic peristaltic waves move up abdomen at frequency 3-5 per same can be elicited isolated pharate abdomens. 2.The completely CNS responded to generation programme motor activity mimicked expected during pre-eclosion behaviours. 3.The duration was related general excitatory state preparation varied 57 325 In latter instances, lengthened as unit with proportional increases occurring lengths both periods. But structure individual rotational bursts appeared independent these changes overall timing programme. 4.The always lower than seen intact animals. not correlated length preceding behaviour. It concluded represented behavioural distinct bursting. 5.Isolated abdomens had been aged 2 days, often lost ability perform but still showed response injection. cases did begin until 70-90 Similar results were obtained abdomen. 6.Hormone added preparations then washedout various times thereafter. After initial exposure only few minutes, could removed without interference initiation or play-out either 7.It acts directly on trigger two programmes. sequential arrangement programmes due primarily their respective latencies. Each has two-tier hierarchical includes burst timer pattern generator. Sensory feedback appears affect different components programme, sensory input alters rotary apparently number generated case influences bursting bursts.