Conditions for noise reduction and stable encoding of spatial structure by cortical neural networks.

abstract：:We consider a simple electronic circuit model of a single neuron. The neuron is assumed to be driven by an external signal comprising constant (dc) and random components. In addition, the nonlinearity parameter in the circuit is assumed to fluctuate, thereby giving rise to critical behavior including the onset of hyst...

journal_title：Biological cybernetics

authors： Bulsara AR,Boss RD,Jacobs EW

更新日期：1989-01-01 00:00:00

abstract：:In neural networks the activation process controls the output as a nonlinear function of the input; and, this output remains bounded between limits as decided by a logistic function known as the sigmoid (S-shaped). Presently, by applying the considerations of Maxwell-Boltzmann statistics, the Langevin function is show...

journal_title：Biological cybernetics

authors： Neelakanta PS,Sudhakar R,DeGroff D

更新日期：1991-01-01 00:00:00

abstract：:Simulations of neural activity are commonly based on differential equations. We address the question what can be achieved with a simplified discrete model. The proposed model resembles artificial neural networks enriched with additional biologically inspired features. A neuron has several states, and the state transit...

journal_title：Biological cybernetics

authors： Bazenkov NI,Boldyshev BA,Dyakonova V,Kuznetsov OP

更新日期：2020-06-01 00:00:00

abstract：:The local extraction of motion information from brightness patterns by individual movement detectors of the correlation-type is considered in the first part of the paper. A two-dimensional field theory of movement detection is developed by treating the distance between two adjacent photoreceptors as a differential. In...

journal_title：Biological cybernetics

authors： Reichardt WE,Schlögl RW

更新日期：1988-01-01 00:00:00

abstract：:A neural model is proposed for the spatiotemporal properties of simple cells in the visual cortex. In the model, several cortical cells are arranged on a ring, with mutual excitatory or inhibitory connections. The cells also receive excitatory inputs either from lagged and nonlagged cells of the lateral geniculate nuc...

journal_title：Biological cybernetics

authors： Hamada T,Yamashima M,Kato K

更新日期：1997-10-01 00:00:00

abstract：:We propose a function-oriented model of the visual cortex. The model addresses an essential task of the visual system: to detect and represent objects. These are defined as sets, which reappear in the input with invariant inner relations. A network, incorporating an idealized description of anatomical and physiologica...

journal_title：Biological cybernetics

authors： Neven H,Aertsen A

更新日期：1992-01-01 00:00:00

abstract：:Synchronization properties of locally coupled neural oscillators were investigated analytically and by computer simulation. When coupled in a manner that mimics excitatory chemical synapses, oscillators having more than one time scale (relaxation oscillators) are shown to approach synchrony using mechanisms very diffe...

journal_title：Biological cybernetics

authors： Somers D,Kopell N

更新日期：1993-01-01 00:00:00

abstract：:A central pattern generator (CPG) is built to control a mechanical device (plant) inspired by the pyloric chamber of the lobster. Conductance-based models are used to construct the neurons of the CPG. The plant has an associated function that measures the amount of food flowing through it per unit of time. We search f...

journal_title：Biological cybernetics

authors： Huerta R,Sánchez-Montañés MA,Corbacho F,Sigüenza JA

更新日期：2000-01-01 00:00:00

abstract：:Information about time-dependent sensory stimuli is encoded in the activity of neural populations; distinct aspects of the stimulus are read out by different types of neurons: while overall information is perceived by integrator cells, so-called coincidence detector cells are driven mainly by the synchronous activity ...

journal_title：Biological cybernetics

authors： Bostner Ž,Knoll G,Lindner B

更新日期：2020-06-01 00:00:00

abstract：:We study the dynamics of a system of coupled nonlinear oscillators that has been used to model coordinated human movement behavior. In contrast to earlier work we examine the case where the two component oscillators have different eigenfrequencies. Problems related to the decomposition of a time series (from an experi...

journal_title：Biological cybernetics

authors： Fuchs A,Jirsa VK,Haken H,Kelso JA

更新日期：1996-01-01 00:00:00

abstract：:Experimental studies have shown that responses of ventral intraparietal area (VIP) neurons specialize in head movements and the environment near the head. VIP neurons respond to visual, auditory, and tactile stimuli, smooth pursuit eye movements, and passive and active movements of the head. This study demonstrates ma...

journal_title：Biological cybernetics

authors： McCollum G,Klam F,Graf W

更新日期：2012-07-01 00:00:00

abstract：:This work presents unified analyses of spatial and temporal visual information processing in a feed-forward network of neurons that obey membrane, or shunting equations. The feed-forward shunting network possesses properties that make it well suited for processing of static, spatial information. However, it is shown h...

journal_title：Biological cybernetics

authors： Gaudiano P

更新日期：1992-01-01 00:00:00

abstract：:Stable signal transmission is crucial for information processing by the brain. Synfire-chains, defined as feed-forward networks of spiking neurons, are a well-studied class of circuit structure that can propagate a packet of single spikes while maintaining a fixed packet profile. Here, we studied the stable propagatio...

journal_title：Biological cybernetics

authors： Teramae JN,Fukai T

更新日期：2008-08-01 00:00:00

abstract：:Parameters in diffusion neuronal models are divided into two groups; intrinsic and input parameters. Intrinsic parameters are related to the properties of the neuronal membrane and are assumed to be known throughout the paper. Input parameters characterize processes generated outside the neuron and methods for their e...

journal_title：Biological cybernetics

authors： Lansky P,Ditlevsen S

更新日期：2008-11-01 00:00:00

abstract：:The proposal that rod outer segment length is optimal with respect to photon absorption and noise control is extended and tested in a number of species. We find good agreement with our optimality criterion in duplex retinae where rods act as detectors of one or a few photons, but not in all rod retinae nor in those wh...

journal_title：Biological cybernetics

authors： Leibovic KN,Moreno-Diaz R Jr

更新日期：1992-01-01 00:00:00

abstract：:Flies have the capability to visually track small moving targets, even across cluttered backgrounds. Previous computational models, based on figure detection (FD) cells identified in the fly, have suggested how this may be accomplished at a neuronal level based on information about relative motion between the target a...

journal_title：Biological cybernetics

authors： Higgins CM,Pant V

更新日期：2004-12-01 00:00:00

abstract：:Highly-interconnected networks of nonlinear analog neurons are shown to be extremely effective in computing. The networks can rapidly provide a collectively-computed solution (a digital output) to a problem on the basis of analog input information. The problems to be solved must be formulated in terms of desired optim...

journal_title：Biological cybernetics

authors： Hopfield JJ,Tank DW

更新日期：1985-01-01 00:00:00

abstract：:Under a 90 degrees rotation of motor space relative to visual space, human two-dimensional aiming movements frequently take the form of smooth arcs such as spirals and semi-circles. A time-independent differential equation explains this tendency in terms of a rotation-induced vector field made up, at each point in the...

journal_title：Biological cybernetics

authors： Cunningham HA,Vardi I

更新日期：1990-01-01 00:00:00

abstract：:Compared to all other hearing animals, insects are the smallest ones, both in absolute terms and in relation to the wavelength of most biologically relevant sounds. The ears of insects can be located at almost any possible body part, such as wings, legs, mouthparts, thorax or abdomen. The interaural distances are gene...

journal_title：Biological cybernetics

authors： Römer H,Schmidt AK

更新日期：2016-10-01 00:00:00

abstract：:We offer a hypothesis on the organization of multi-effector motor synergies and illustrate it with the task of force production with a set of fingers. A physical metaphor, a leaking bucket, is analyzed to demonstrate that an inanimate structure can show apparent error compensation among its elements. A neural model is...

journal_title：Biological cybernetics

authors： Latash ML,Shim JK,Smilga AV,Zatsiorsky VM

更新日期：2005-03-01 00:00:00

abstract：:Most robot navigation systems perform place recognition using a single-sensor modality and one, or at most two heterogeneous map scales. In contrast, mammals perform navigation by combining sensing from a wide variety of modalities including vision, auditory, olfactory and tactile senses with a multi-scale, homogeneou...

journal_title：Biological cybernetics

authors： Jacobson A,Chen Z,Milford M

更新日期：2018-06-01 00:00:00

abstract：:A pacemaker cell pair model and the dynamic interaction between the two pacemaker cells is described in this paper. It is an extension of our single pacemaker cell model, in which we studied its response to repetitive external depolarization stimulations. This model is a simple model based on the two most important fu...

journal_title：Biological cybernetics

authors： Abramovich-Sivan S,Akselrod S

更新日期：1998-07-01 00:00:00

abstract：:Learning to make reaching movements in force fields was used as a paradigm to explore the system architecture of the biological adaptive controller. We compared the performance of a number of candidate control systems that acted on a model of the neuromuscular system of the human arm and asked how well the dynamics of...

journal_title：Biological cybernetics

authors： Bhushan N,Shadmehr R

更新日期：1999-07-01 00:00:00

abstract：:Fast as possible (time optimal) single joint movements throughout the body are characterized by the triphasic (3 pulse) pattern of activation in the agonist and antagonist muscles. Simulation studies using a sixth order, non-linear model were undertaken to determine the relationship between time optimal movement and t...

journal_title：Biological cybernetics

authors： Hannaford B,Stark L

更新日期：1987-01-01 00:00:00

abstract：:David Marr and others have hypothesized that the visual system processes complex scene information in stages, the first of which involves the detection of light intensity edges or "zero-crossings" (Marr, 1982). Ideal zero-crossing detector mechanisms have been described and modeled in terms of their possible physiolog...

journal_title：Biological cybernetics

authors： Hochstein S,Spitzer H

更新日期：1984-01-01 00:00:00

abstract：:Insects can remember and return to a place of interest using the surrounding visual cues. In previous experiments, we showed that crickets could home to an invisible cool spot in a hot environment. They did so most effectively with a natural scene surround, though they were also able to home with distinct landmarks or...

journal_title：Biological cybernetics

authors： Mangan M,Webb B

更新日期：2009-10-01 00:00:00

abstract：:The information transmission properties of single, de-efferented primary muscle-spindle afferents from the hind limb of the cat were investigated. The gastrocnemius medialis muscle was stretched randomly while recording spike trains from several muscle-spindle afferents in the dorsal root. Two classes of input stimuli...

journal_title：Biological cybernetics

authors： Tock Y,Ljubisavljevic M,Thunberg J,Windhorst U,Inbar GF,Johansson H

更新日期：2002-10-01 00:00:00

abstract：:Tongue movements during speech production have been investigated by means of a simple yet realistic biomechanical model, based on a finite elements modeling of soft tissues, in the framework of the equilibrium point hypothesis (lambda-model) of motor control. In particular, the model has been applied to the estimation...

journal_title：Biological cybernetics

authors： Sanguineti V,Laboissière R,Payan Y

更新日期：1997-07-01 00:00:00

abstract：:We have previously proposed that electrocortical waves are linear waves, subject to regulation by mesotelencephalic dopaminergic neurones. As a further means to test this theory, selective unilateral lesions of varying extent were made in the nucleii of origin of the dopaminergic mesotelencephalic tract. Changes in th...

journal_title：Biological cybernetics

authors： Wright JJ,Kydd RR,Lees GJ

更新日期：1985-01-01 00:00:00

abstract：:With regular trains of stimuli at a high frequency, the contribution of each stimulus to the force generated over time declines from the second to about the tenth stimulus, but then begins to increase again. This late increase is referred to as tetanic potentiation in analogy with the post-tetanic potentiation of the ...

journal_title：Biological cybernetics

authors： Parmiggiani F,Stein RB,Rolf R

更新日期：1982-01-01 00:00:00