Información del autor
Autor Makarov, Valeri A. |
Documentos disponibles escritos por este autor (54)
texto impreso
Makarov, Valeri A. ; Velarde, Manuel G. ; Chetverikov, Alexander ; Ebeling, Werner | American Physical Society | 2006-06We provide here a thorough analysis of the interplay between anharmonic lattice dynamics (with exponential repulsion between units) and electric conduction in a driven-dissipative electrically charged one-dimensional system. First, we delineate [...]texto impreso
Makarov, Valeri A. ; Pavlov, Alexey N. ; Mosekilde, Erik ; Sosnovtseva, Olga V. | Oxford University Press | 2006-12The article makes use of three different examples (sensory information processing in the rat trigeminal complex, intracellular interaction in snail neurons and multimodal dynamics in nephron autoregulation) to demonstrate how modern approaches t[...]texto impreso
In the present work we study how sensory inputs conveyed by nerve fibers in the form of spatiotemporal patterns generate different responses in the central nervous system (CNS) depending on the physical characteristics of the stimulus applied an[...]texto impreso
Makarov, Valeri A. ; Del Río, Ezequiel ; Bedia, Manuel G. ; Velarde, Manuel G. ; Ebeling, Werner | World Academy of Science, Engineering & Technology | 2006We proposed the use of a Toda-Rayleigh ring as a central pattern generator (CPG) for controlling hexapodal robots. We show that the ring composed of six Toda-Rayleigh units coupled to the limb actuators reproduces the most common hexapodal gaits[...]texto impreso
Makarov, Valeri A. ; Nekorkin, Vladimir I. ; Velarde, Manuel G. | American Physical Society | 1998-11We consider a chain with many locally coupled bistable nonisochronous oscillators. We show that on the "background" of a disordered amplitude distribution either phase or frequency clusters form in the chain. Cluster location varies according to[...]texto impreso
We study a one-dimensional ring chain of length L with N particles interacting via Morse potentials and influenced by dissipative forces (passive and active friction). We show that by negative friction the system can be driven far from the therm[...]texto impreso
Makarov, Valeri A. ; Villacorta-Atienza, José Antonio ; Salas, Luis ; Alba, Luis ; Velarde, Manuel G. | Spie-Int Soc Optical Engineering | 2011Animals for surviving have developed cognitive abilities allowing them an abstract representation of the environment. This Internal Representation (IR) could contain a huge amount of information concerning the evolution and interactions of the e[...]texto impreso
Animals for survival in complex, time-evolving environments can estimate in a "single parallel run" the fitness of different alternatives. Understanding of how the brain makes an effective compact internal representation (CIR) of such dynamic si[...]texto impreso
Makarov, Valeri A. ; Castellanos, Nazareth P. ; Malmierca, Eduardo ; Núñez, Ángel | American Physiological Society | 2007Precise and reproducible spike timing is one of the alternatives of the sensory stimulus encoding. We test coherence (repeatability) of the response patterns elicited in projecting gracile neurons by tactile stimulation and its modulation provok[...]texto impreso
Fernández Ruiz, Antonio ; Muñoz, Sagrario ; Sancho, Miguel ; Makarova, Julia ; Makarov, Valeri A. ; Herreros, Oscar | Society for Neuroscience | 2013-09To determine why some pathways but not others produce sizable local field potentials (LFPs) and how far from the source can these be recorded, complementary experimental analyses and realistic modeling of specific brain structures are required. [...]texto impreso
The evolution and collision of dark solitary waves (solitons) appearing in cigar-shaped Bose-Einstein condensates with repulsive atom-atom interaction are here considered using a Boussinesq-Korteweg-de Vries description. We provide theoretical p[...]texto impreso
The spontaneous activity of working neurons yields synaptic currents that mix up in the volume conductor. This activity is picked up by intracerebral recording electrodes as local field potentials (LFPs), but their separation into original infor[...]texto impreso
Makarov, Valeri A. ; Río, E. del ; Ebeling, Werner ; Velarde, Manuel G. | American Physical Society | 2001-09A detailed theoretical and experimental analysis of the possible oscillatory regimes of the dissipative Toda-Rayleigh lattice system is provided. It is shown that the system has (N-1) oscillatory modes with different space-time scales and two ro[...]texto impreso
Martín Vazquez, Gonzalo ; Benito, Nuria ; Makarov, Valeri A. ; Herreras, Oscar ; Makarova, Julia | Oxford University Press | 2016Identifying the pathways contributing to local field potential (LFP) events and oscillations is essential to determine whether synchronous interregional patterns indicate functional connectivity. Here, we studied experimentally and numerically h[...]texto impreso
Makarov, Valeri A. ; Song, Yongli ; Velarde, Manuel G. ; Hübner, David ; Cruse, Holk | Springer Verlag | 2008-05We study how individual memory items are stored assuming that situations given in the environment can be represented in the form of synaptic-like couplings in recurrent neural networks. Previous numerical investigations have shown that specific [...]texto impreso
Makarov, Valeri A. ; Río, E. del ; Ebeling, Werner ; Velarde, Manuel G. | Spie-Int Soc Optical Engineering | 2003An experimental study has been carried out of a noisy dissipative-driven ring lattice of units coupled via Morse potentials. An electronic circuit mimicking the lattice dynamics and noise sources is used. We show that inclusion of long range att[...]texto impreso
Makarova J, Makarova VA, Herreras O. Generation of sustained field potentials by gradients of polarization within single neurons: a macroscopic model of spreading depression. J Neurophysiol 103: 2446-2457, 2010. First published March 10, 2010; d[...]texto impreso
High-dimensional data and high-dimensional representations of reality are inherent features of modern Artificial Intelligence systems and applications of machine learning. The well-known phenomenon of the “curse of dimensionality” states: many p[...]texto impreso
Surface electromyographic (sEMG) signals represent a superposition of the motor unit action potentials that can be recorded by electrodes placed on the skin. Here we explore the use of an easy wearable sEMG bracelet for a remote interaction with[...]texto impreso
Makarov, Valeri A. ; Castellanos, Nazareth P. | World Academy of Science, Engineering & Technology | 2006Statistical analysis of electrophysiological recordings obtained under, e.g. tactile, stimulation frequently suggests participation in the network dynamics of experimentally unobserved "hidden" neurons. Such interneurons making synapses to exper[...]texto impreso
Lobov, Sergey ; Krilova, Nadia ; Kastalskiy, Innokentiy ; Kazantsev, Victor ; Makarov, Valeri A. | MDPI | 2018-04-06Recent advances in recording and real-time analysis of surface electromyographic signals (sEMG) have fostered the use of sEMG human–machine interfaces for controlling personal computers, prostheses of upper limbs, and exoskeletons among others. [...]texto impreso
The synchronization of oscillatory activity in networks of networks is usually implemented through coupling the state variables describing the dynamics of each network. Here we study another but complementary mechanism of synchronization in unid[...]texto impreso
Villacorta-Atienza, José Antonio ; Calvo, Carlos ; Lobov, S. ; Makarov, Valeri A. | EDP SCIENCES S A | 2017The fundamental bases of how our brain solves different tasks of object manipulation remain largely unknown. Here we consider the problem of the limb movement in dynamic situations on an abstract cognitive level and propose a novel approach rely[...]texto impreso
Makarov, Valeri A. ; Berg, Christian ; Villacorta-Atienza, José Antonio ; Velarde, Manuel G. ; Arena, Paolo ; Patane, Luca ; Termini, Pietro Savio ; Strauss, Roland | Informa Healthcare | 2010-12Proper orientation is one of the most important skills in the repertoire of an organism. Many different strategies are used in the animal kingdom to find resources like food, nesting sites, a comfortable environment, or mating partners. Optimizi[...]texto impreso
In the present paper we propose a novel method for the identification and modeling of neural networks using extracellular spike recordings. We create a deterministic model of the effective network, whose dynamic behavior fits experimental data. [...]texto impreso
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: [...]texto impreso
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[...]texto impreso
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 [...]texto impreso
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 [...]texto impreso
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 [...]texto impreso
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[...]texto impreso
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[...]texto impreso
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[...]texto impreso
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[...]texto impreso
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[...]texto impreso
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[...]texto impreso
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[...]texto impreso
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 [...]texto impreso
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 [...]texto impreso
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.texto impreso
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[...]texto impreso
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[...]texto impreso
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[...]texto impreso
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[...]texto impreso
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[...]texto impreso
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.[...]texto impreso
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[...]texto impreso
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[...]texto impreso
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[...]texto impreso
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[...]