A spiking neuron implementation of pattern recognition of the calling songs in
Gryllus bimaculatus is proposed. A simplified model of the auditory
interneuron AN1 has been fitted to extracellular physiological data. The model
captures the aspects of AN1’s rate-response to acoustic stimulation which are
believed to be sufficient for pattern recognition. Stimulation patterns can be
induced into the model via current injecton of the signals envelope-shapes.
The model was used as the input stage to the pattern recognition mechanisms. A
biologically plausible filter mechanism for pulse-pause patterns is proposed
which is based on short term synaptic plasticity. Three simple filter
mechanism are described, based on either isolated synaptic depression or
synaptic facilitation. These filters are able to reproduce physiological
findings from the cricket’s auditory brain neurons. Further, it is argued that
more complex filters can be produced by using combinations of depression and
facilitation, and that a complete model of the cricket’s pattern recognition
apparatus may be implemented in this way. This however is left as a subject of
further studies
