dorsal/arxiv
View SchemaA neural mechanism for binaural pitch perception via ghost stochastic resonance
| Authors | Pablo Balenzuela, Jordi Garcia-Ojalvo |
|---|---|
| Categories | |
| ArXiv ID | q-bio/0409004 |
| URL | https://arxiv.org/abs/q-bio/0409004 |
| DOI | 10.1063/1.1871612 |
Abstract
We present a physiologically plausible binaural mechanism for the perception of the pitch of complex sounds via ghost stochastic resonance. In this scheme, two neurons are driven by noise and different periodic signal each (with frequencies f1=kf0 and f2=(k+1)f0, where k>1), and their outputs (plus noise) are applied synaptically to a third neuron. Our numerical results, using the Morris-Lecar neuron model with chemical synapses explicity considered, show that intermediate noise levels enhance the response of the third neuron at frequencies close to f0, as in the cases previously described of ghost resonance. For the case of inharmonic combinations of inputs (both frequencies shifted by the same amount Df) noise is also seen to enhance the response of the third neuron at a frequency fr with also shift linearly with Df. In addition, we show that similar resonances can be observed as a function of the synaptic time constant. The suggested ghost-resonance-based stochastic mechanism can thus arise either at the peripheral level or at a higher level of neural processing in the perception of the pitch
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"abstract": "We present a physiologically plausible binaural mechanism for the perception\nof the pitch of complex sounds via ghost stochastic resonance. In this scheme,\ntwo neurons are driven by noise and different periodic signal each (with\nfrequencies f1=kf0 and f2=(k+1)f0, where k\u003e1), and their outputs (plus noise)\nare applied synaptically to a third neuron. Our numerical results, using the\nMorris-Lecar neuron model with chemical synapses explicity considered, show\nthat intermediate noise levels enhance the response of the third neuron at\nfrequencies close to f0, as in the cases previously described of ghost\nresonance. For the case of inharmonic combinations of inputs (both frequencies\nshifted by the same amount Df) noise is also seen to enhance the response of\nthe third neuron at a frequency fr with also shift linearly with Df. In\naddition, we show that similar resonances can be observed as a function of the\nsynaptic time constant. The suggested ghost-resonance-based stochastic\nmechanism can thus arise either at the peripheral level or at a higher level of\nneural processing in the perception of the pitch",
"arxiv_id": "q-bio/0409004",
"authors": [
"Pablo Balenzuela",
"Jordi Garcia-Ojalvo"
],
"categories": [
"q-bio.NC",
"physics.bio-ph"
],
"doi": "10.1063/1.1871612",
"title": "A neural mechanism for binaural pitch perception via ghost stochastic resonance",
"url": "https://arxiv.org/abs/q-bio/0409004"
},
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