home *** CD-ROM | disk | FTP | other *** search
- Xref: sparky comp.ai.neural-nets:4793 bionet.neuroscience:637 comp.ai:4814
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!darwin.sura.net!bogus.sura.net!howland.reston.ans.net!usc!usc!not-for-mail
- From: jdevlin@pollux.usc.edu (Joseph T. Devlin)
- Newsgroups: comp.ai.neural-nets,bionet.neuroscience,comp.ai
- Subject: Re: Biologically Plausible Dynamic Artificial Neural Networks
- Date: 11 Jan 1993 11:42:25 -0800
- Organization: University of Southern California, Los Angeles, CA
- Lines: 57
- Message-ID: <1isij1INN5gs@pollux.usc.edu>
- References: <1993Jan11.140108.8022@rhrk.uni-kl.de>
- NNTP-Posting-Host: pollux.usc.edu
- Summary: The level of the model varies according the task
- Keywords: ANN, biological modeling, cognitive modeling
-
- Ulf Andrick writes:
- >I just wanted to counter the view that Artificial Neural
- >Networks (ANN) are suitable to explain everything in the brain.
-
- I think I can be fairly confident when I say that no-one
- really suggests that ANNs might explain "everything in the
- brain" - that'd be a neat trick! It'd put us all out jobs,
- however...
-
- >Further more, the posting I answered to referred to small
- >neural systems in simple organisms, and here, I don't see a
- >field for the application of ANN. I think of the stomatogastric
- >ganglion of the crab or the flight generator of the locust
- >when talking about small neural systems.
-
- I think this depends on what exactly you are referring to
- when you say "Artificial Neural Net (ANN)". If you mean any
- computational model of neural activity then certainly
- Selverston's work at UCSD qualifies as a small ANN in a simple
- organism (the lobster stomatoganglion system).
- If, on the other hand, you mean solely the more traditional
- ANNs such as the models in McClelland and Rumelhart's PDP book
- then I would agree. These types of models seem to provide no
- real insight into detailed neural systems that are fairly well
- characterized biologically but I don't believe they were intended
- to, either. PDP models are more useful for modeling cognitive
- issues where the underlying biology is as yet unknown but
- nonetheless the modeler would like to capture general components
- of the biology - such as distributed representation, massive
- parallelism, etc. As it stands there is certainly debate concerning
- the usefullness of these models - see the ongoing McCloskey/Seidenberg
- debate - but I like Seidenberg's arguments which I think are very
- elegant (but I work in his lab so I'm biased. :-)
-
- - Joe
-
- *************************************************************************
- Joseph Devlin * email: jdevlin@pollux.usc.edu
- University of Southern California *
- Department of Computer Science * "The axon doesn't think.
- Los Angeles, CA 90089 * It just ax." George Bishop
- *************************************************************************
-
- McClelland and Rumelhart (1986) _Parallel Distributed Processing_, MIT Press.
-
- McCloskey (1992) Networks and theories: The place of connectionism in cognitive
- science. _Psychogical Science_
-
- Rowat & Selverston (1991) Learning algorithms for oscillatory networks with
- gap junctions and membrane currents. _Networks 2_, 17-41.
-
- Seidenberg (in press) [A response to McCloskey...] _Psychological Science_
-
- Note: The references are from memory basically so I apologize for any
- inaccuracies in advance. I just can't remember the title of the
- Seidenberg paper - my copy doesn't have one.
-
-