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My lab:
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This was a talk very much to my liking! Rhanor Gillette showed us how different motivational states lead to animals doing completely opposite things to the same stimuli. Fantastic!
The model system here was Pleurobranchia. The networks for the different behaviors (swimming, feeding, etc.) are very well worked out and one can show very nicely how the different networks interact when, e.g., escape swimming inhibits feeding, or when satiation suppresses feeding, or when escape swimming suppresses turning, etc.
The networks are so well-known, in fact, that they built a little analog electronics circuit capturing many of the hierarchical features of the behaviors. Of course, there also is software with this functionality over at their website: SlugCity. There are plenty of videos about the different slugs and behaviors on this site as well.
Rhanor then went on to the general topic of homeostatic plasticity mechanisms in neural networks. One major idea was pre- and postsynaptic crosstalk and tuning between synaptically coupled neurons. He told us about a very nice computer program which models tuning between two reciprocally connected neurons.
Posted on Friday 08 June 2007 - 23:09:19 comment: 0
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