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Autor Makarov, Valeri A. |
Documentos disponibles escritos por este autor (54)
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Makarov, Valeri A. ; Korovaichuk, A. ; Makarova, J. ; Benito, N. ; Herreras, Oscar | American Physiological Society | 2010-07Korovaichuk A, Makarova J, Makarov VA, Benito N, Herreras O. Minor contribution of principal excitatory pathways to hippocampal LFPs in the anesthetized rat: A combined independent component and current source density study. J Neurophysiol 104: [...]![]()
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Makarov, Valeri A. ; Río, E. del ; Velarde, Manuel G. ; Ebeling, Werner | American Physical Society | 2003-05A circular lattice (ring) of N electronic elements with Toda-type exponential interactions and Rayleigh-type dissipation is used to illustrate wave formation, propagation, and switching between wave modes. A methodology is provided to help contr[...]![]()
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In this communication, we present results of experimental work carried out in the frame of the ROSANA project aiming at the investigation of the interactions between sensory inputs and the activity of Central Nervous System (CNS) neurons in the [...]![]()
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Villacorta-Atienza, José Antonio ; Makarov, Valeri A. | IEEE-Inst Electrical Electronics Engineers | 2013-12Navigation in time-evolving environments with moving targets and obstacles requires cognitive abilities widely demonstrated by even simplest animals. However, it is a long-standing challenging problem for artificial agents. Cognitive autonomous [...]![]()
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Makarov, Valeri A. ; Malmierca, Eduardo ; Castellanos, Nazareth P. ; Núñez-Medina, Alberto ; Núñez, Ángel | Blackwell Publishing | 2009-08We have studied the role of the temporal correlation of multiple cell discharges in the facilitation of the somatosensory information transmission from the gracilis nucleus to the primary somatosensory (SI) cortex in anesthetized rats. Pairs of [...]![]()
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Population spike signaling is widely observed both in intact brain and neuronal cultures. Experimental evidence suggests that a locally applied electrical stimulus can shape the network architecture and thus the neuronal response. However, there[...]![]()
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Makarov, Valeri A. ; Nekorkin, Vladimir I. ; Velarde, Manuel G. | World Scientific Publishing | 2001-01A one-dimensional chain consisting of many locally coupled oscillatory units is considered when both diffusive (linear) and nonlinear interactions exist. The dynamics of units may also be altered by a weak white Gaussian noise. Two different col[...]![]()
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The ultimate navigation efficiency of mobile robots in human environments will depend on how we will appraise them: merely as impersonal machines or as human-like agents. In the latter case, an agent may take advantage of the cooperative collisi[...]![]()
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Independent component analysis (ICA) has been proven useful for suppression of artifacts in EEG recordings. It involves separation of measured signals into statistically independent components or sources, followed by rejection of those deemed ar[...]![]()
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Makarov, Valeri A. ; Fernández-Ruiz, Antonio ; Benito, Nuria ; Herreras, Oscar | Society for Neuroscience | 2012-04-11Information processing and exchange between brain nuclei are made through spike series sent by individual neurons in highly irregular temporal patterns. Synchronization in cell assemblies, proposed as a network language for internal neural repre[...]![]()
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Makarov, Valeri A. ; Castellanos, Nazareth P. ; Patane, Luca ; Velarde, Manuel G. | Spie-Int Soc Optical Engineering | 2007Common design of a robot searching for a target emitting sensory stimulus (e.g. odor or sound) makes use of the gradient of the sensory intensity. However, the intensity may decay rapidly with distance to the source, then weak signal-to-noise ra[...]![]()
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Makarov, Valeri A. ; Pavlov, Alexey N. ; Makarova, J. ; Panetsos, Fivos | SPRINGER-VERLAG BERLIN | 2005Spike separation is a basic prerequisite for analyzing of the cooperative neural behavior and neural code when registering extracellularly. Final performance of any spike sorting method is basically defined by the quality of the discriminative f[...]![]()
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Makarov, Valeri A. ; Castellanos, Nazareth P. ; Velarde, Manuel G. | World Academy of Science, Engineering & Technology | 2006In order to answer the general question: "What does a simple agent with a limited life-time require for constructing a useful representation of the environment?" we propose a robot platform including the simplest probabilistic sensory and motor [...]![]()
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Dissipative soliton-like waves in 1D Toda lattices generated by suitable energy supply from external sources have been studied. Using the general theory of canonical-dissipative systems we have constructed a special canonical-dissipative system [...]![]()
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The spatiotemporal behavior of a chain of diffusively coupled bistable oscillators is investigated. It is stated that there is spatial disorder and its evolutionary character is demonstrated.![]()
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Makarov, Valeri A. ; Nekorkin, Vladimir I. ; Kazantsev, V.B. ; Velarde, Manuel G. | Elsevier | 1997-02-01The spatio-temporal dynamics of discrete lattices of coupled bistable elements is considered. It is shown that both regular and chaotic spatial field distributions can be realized depending on parameter values and initial conditions. For illustr[...]![]()
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Benito, N. ; Fernández Ruiz, A. ; Makarov, Valeri A. ; Makarova, J. ; Korovaichuk, A. ; Herreras, O. | Oxford Univ. Press | 2014-07Ongoing network activity often manifests as irregular fluctuations in local field potentials (LFPs), a complex mixture of multicellular synaptic currents of varying locations and extensions. Among other conditions, for synchronously firing presy[...]![]()
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Makarov, Valeri A. ; Nekorkin, Vladimir I. ; Velarde, Manuel G. | American Physical Society | 2001-04-09We show that firing activity (spiking) can be regularized by noise in a FitzHugh-Nagumo (FHN) neuron model when operating slightly beyond the supercritical Hopf bifurcation (in the "canard" region). We also provide the conditions for imperfect p[...]![]()
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Spiking neural networks in-silico can closely resemble the architecture and dynamics of neural networks in-vivo and then mimic brain functions. However, their use for applied computations remains rather limited. In this work we report two succes[...]![]()
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A model of time-delay recurrently coupled spatially segregated neural assemblies is here proposed. We show that it operates like some of the hierarchical architectures of the brain. Each assembly is a neural network with no delay in the local co[...]![]()
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Makarov, Valeri A. ; Schmidt, Kerstin E. ; Castellanos, Nazareth P. ; Innocenti, Giorgio M. ; López-Aguado, Laura | Oxford University Press | 2008-08To study how the visual areas of the 2 hemispheres interact in processing visual stimuli we have recorded local field potentials in the callosally connected parts of areas 17 and 18 of the ferret during the presentation of 3 kinds of stimuli: 2.[...]![]()
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The synchronization of oscillatory activity in networks of neural networks is usually implemented through coupling the state variables describing neuronal dynamics. In this study we discuss another but complementary mechanism based on a learning[...]![]()
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The synchronization of oscillatory activity in neural networks is usually implemented by coupling the state variables describing neuronal dynamics. Here we study another, but complementary mechanism based on a learning process with memory. A dri[...]![]()
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Makarov, Valeri A. ; Pavlov, Alexey N. ; Tupitsyn, Anatoly N. ; Panetsos, Fivos ; Moreno, Ángel ; García-González,, Víctor ; Sánchez-Jiménez,, Abel | Spie-Int Soc Optical Engineering | 2007We study mechanisms of information processing in the principalis (Pr5), oralis (Sp5o) and interpolaris (Sp5i) nuclei of the trigeminal sensory complex of the rat under whisker stimulation by short air puffs. After the standard electrophysiologic[...]![]()
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Benito, N. ; Martin Velazquez, G. ; Makarova, V.A. ; Makarov, Valeri A. ; Herreras, O | eLife Sciences Publications Ltd | 2016It is unclear whether the two hippocampal lobes convey similar or different activities and how they cooperate. Spatial discrimination of electric fields in anesthetized rats allowed us to compare the pathway-specific field potentials correspondi[...]