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  Subject:   Applied Physics/Physics Colloquium

  Sponsor:   Applied Physics/Physics

  Speaker:   Henry D. I. Abarbanel

  Date:   Tuesday, October 31, 2000

  Time:   4pm -

  Location:   TCSEQ 201 [look for it in a campus map]

  Contact:   Judy Meo

Speaker:  Henry D. I. Abarbanel
Department of Physics and Marine Physical Laboratory, 
Scripps Institution of Oceanography, 
University of California, San Diego

Title:  Small Networks of Biological and Electronic Neurons

We have studied, experimentally and theoretically, 
the membrane voltage activity of individual and small collections 
of neurons in a Central pattern Generator of lobster. 
Our nonlinear analysis of this activity will be presented, 
and we will show that only three to five degrees of freedom 
are expressed in these observations. I will describe "reduced" 
models of these neurons which capture just these degrees of freedom, 
and I will discuss our successful efforts in reproducing these models 
in low frequency, simple analog circuitry.

We have successfully built "hybrid" circuits of electronic and 
biological neurons, and we have shown how one can repair damaged 
biological neural circuits using our electronic neurons.

Some potential applications of the electronic/biological 
circuitry will be discussed.

 Event history: Submitted by judymeo on 11-Oct-2000;