Abstract
The response of a neuron to a linear combination of the first two harmonics
of a fundamental frequency is studied by means of a leaky integrate and fire model. A
suitable modification of the classical stochastic model is introduced to consider such
input. The resulting interspike interval distribution exhibits maxima in correspondence
with the fundamental frequency that was absent in the input signal. This fact shows
the ability of the system to recognize the ”ghost” frequency. Resonance-like behavior is
also showed by the model neuron in a set of instances. The simplicity of the considered
model makes also easy to understand the features involved in the ghost resonance
phenomenon and to recognize the parameter the ranges compatible with such behavior.
