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Home-> Computation->Circuits


Circuits

The temporal resolution of a single neuron depends on the synaptic firing-duration and the post synatic recovery time. The electrical spikes produced by individual neurons lasts about 100 hundred milli-seconds, but the temporal resolution of a neuron is usually more than twice this long.

The synapse [1] of an auditory neuron is show below.

(A) Spike counts for 25 neurons over 40 trails with a mean firing rate of 400 hz. The stimulus occurs from 0 to 20 ms.
(B) Single postsynaptic neuron's action potential.



Bandpass coincidence detection duration tuning.



Basic Circuitry


from: Computational Models of Millisecond Level Duration Tuning in Neural Circuits, Brandon Aubie, Suzanna Becker, and Paul A. Faure [1]

In the bandpass coincidence detection model, the duration tuned neuron, DTN, responds only when the stimulus results in the production of spikes in the ON cells and synapses from the ON-delay and OFF cells coincide. SI are the sustained inhibitory cells. The excitatory synapses are connected with solid lines, and inhibitory ones with dashed lines with connection weights.


Reference

1. Computational Models of Millisecond Level Duration Tuning in Neural Circuits,
Brandon Aubie, Suzanna Becker, and Paul A. Faure,
Journal of Neuroscience, July 22, 2009, 29(29):9255-9270


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