Neuronal couplings between retinal ganglion cells inferred by efficient inverse statistical physics methods.
Complexity of neural systems often makes impracticable explicit measurements of all interactions between their constituents. Inverse statistical physics approaches, which infer effective couplings between neurons from their spiking activity, have been so far hindered by their computational complexity. Here, we present 2 complementary, computationally efficient inverse algorithms based on the Ising and "leaky integrate-and-fire" models. We apply those algorithms to reanalyze multielectrode recordings in the salamander retina in darkness and under random visual stimulus. We find strong positive couplings between nearby ganglion cells common to both stimuli, whereas long-range couplings appear under random stimulus only. The uncertainty on the inferred couplings due to limitations in the recordings (duration, small area covered on the retina) is discussed. Our methods will allow real-time evaluation of couplings for large assemblies of neurons.
Cocco
Simona
S
Laboratoire de Physique Statistique de l'Ecole Normale Supérieure, Université Pierre et Marie Curie, Université Denis Diderot, Centre National de la Recherche Scientifique, 24 Rue Lhomond, 75005 Paris, France. cocco@lps.ens.fr
Leibler
Stanislas
S
Monasson
Rémi
R
D000200:Action Potentials; D000465:Algorithms; D000818:Animals; D001703:Biophysics / Q000379:methods*; D003198:Computer Simulation; D004594:Electrophysiology / Q000379:methods; D006801:Humans; D008954:Models, Biological; D008959:Models, Neurological; D015233:Models, Statistical; D009415:Nerve Net; D009474:Neurons / Q000378:metabolism*; D012160:Retina / Q000502:physiology; D012165:Retinal Ganglion Cells / Q000378:metabolism / Q000502:physiology*; D013997:Time Factors