Abstract
The feeding response of Lymnaea stagnalis shows robust appetitive conditioning to a novel chemostimulus (amyl acetate), which is retained for more than 4 days. In scrru-isolate d central nervous system (CNS)-hp preparations taken from conditioned snails, application of amyl acetate to lip tissue led to the onset of fictive feeding in 5/17 individuals, and excitation of an identified cerebral-buccal feeding intemeuron, CV1,. in a further 8. Control group snails showed no response to amyl acetate. Attempts were made to aversively condition L. stagnalis using a food stimulus (sucrose) as the conditioned stimulus and either an electric shock or mechanical stimulus as the unconditioned stimulus. No conditioned response to sucrose (i.e. withdrawal) was seen following training. However, trained snails exhibited a reduction in responsiveness which was manifest as inhibition of the feeding response to sucrose and an increase in the time taken to emerge from the shell following handling. This reduced responsiveness was seen at 1 hr but was lost by 24 hr after training, and was not observed in control group snails. Semi-isolated CNS-hp preparations from experimental snails recorded 1-3 hr after training exhibited either inhibition of fictive feeding or no response following application of sucrose. Control group snails showed the normal excitatory response to sucrose including induction of feeding motor output
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
