Right-left discrimination in a biologically oriented model of the cockroach escape system |
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| Authors: | Erez A Ezrachi Rafael Levi Jeffrey M Camhi Hanna Parnas |
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| Institution: | (1) Department of Neurobiology, Hebrew University, Jerusalem 91904, Israel, IL;(2) The Center for Neural Computation, Hebrew University, Jerusalem 91904, Israel, IL;(3) Department of Cell and Animal Biology, Hebrew University, Jerusalem 91904, Israel, IL;(4) The Otto Loewi Minerva Center for Cellular and Molecular Neurobiology, Hebrew University, Jerusalem 91904, Israel, IL |
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| Abstract: | We present a biologically oriented model that accounts for left-right discrimination in the cockroach's escape behavior.
The model includes the main groups of neurons found to be involved in the escape response. Each one of the included neurons
is described by the actual processes taking place in an individual neuron (formation of an action potential, transmitter release,
conductance changes, etc.). Furthermore, realistic chemical synapses (excitatory or inhibitory and able to undergo different
types of modulation) connect the various neurons. With this model, we were able to achieve, for a wide range of inputs representing
different wind directions, behavior which resembles that found experimentally. The model indicates that several synaptic properties,
in particular postsynaptic inhibition and presynaptic facilitation, play a key role in the discrimination of wind direction.
Received: 22 January 1999 / Accepted in revised form: 1 March 1999 |
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