Sciweavers

Share
NECO
2008

Faithful Representation of Stimuli with a Population of Integrate-and-Fire Neurons

9 years 11 months ago
Faithful Representation of Stimuli with a Population of Integrate-and-Fire Neurons
We consider a formal model of stimulus encoding with a circuit consisting of a bank of filters and an ensemble of integrate-and-fire neurons. Such models arise in olfactory systems, vision and hearing. We demonstrate that bandlimited stimuli can be faithfully represented with spike trains generated by the ensemble of neurons. We provide a stimulus reconstruction scheme based on the spike times of the ensemble of neurons and derive conditions for perfect recovery. The key result calls for the spike density of the neural population to be above the Nyquist rate. We also show that recovery is perfect if the number of neurons in the population is larger than a threshold value. Increasing the number of neurons to achieve a faithful representation of the sensory world is consistent with basic neurobiological thought. Finally we demonstrate that, in general, the problem of faithful recovery of stimuli from the spike train of single neurons is ill-posed. The stimulus can be recovered, however,...
Aurel A. Lazar, Eftychios A. Pnevmatikakis
Added 14 Dec 2010
Updated 14 Dec 2010
Type Journal
Year 2008
Where NECO
Authors Aurel A. Lazar, Eftychios A. Pnevmatikakis
Comments (0)
books