The information content of texture gradients.

abstract：:With relative phase as a collective variable or order parameter, phase attractive dynamics can capture the temporally coherent behavior of a large number of different experimental systems. We present results from multifrequency coordination experiments in humans showing: a) that phase attraction persists especially fo...

journal_title：Biological cybernetics

authors： deGuzman GC,Kelso JA

更新日期：1991-01-01 00:00:00

abstract：:A linear analogue network model is proposed to describe the neuronal circuit of the outer retina consisting of cones, horizontal cells, and bipolar cells. The model reflects previous physiological findings on the spatial response properties of these neurons to dim illumination and is expressed by physiological mechani...

journal_title：Biological cybernetics

authors： Yagi T,Ohshima S,Funahashi Y

更新日期：1997-09-01 00:00:00

abstract：:The activation patterns underlying the electrical activity of the heart during atrial fibrillation (AF) are not entirely random. The aim of this study was to assess the local organization of the activation processes during AF by estimating the non-linear coupling between activation sequences (ASs) in two atrial sites....

journal_title：Biological cybernetics

authors： Censi F,Barbaro V,Bartolini P,Calcagnini G,Michelucci A,Cerutti S

更新日期：2001-09-01 00:00:00

abstract：:A mathematical model for describing dynamic phenomena in the olfactory bulb is presented. The nature of attractors and the bifurcation sequences in terms of the lateral connection strength in the mitral layer are studied numerically. Chaotic activity has only been found in the case of strong excitatory coupling. Synap...

journal_title：Biological cybernetics

authors： Erdi P,Gröbler T,Barna G,Kaski K

更新日期：1993-01-01 00:00:00

abstract：:Depolarization of an excitable membrane has a dual effect; excitatory in that it causes rapid opening of calcium and/or sodium channels but inhibitory in that it also causes those channels to inactivate. We considered whether apparently paradoxical or dual behavior might be exhibited by excitatory and inhibitory synap...

journal_title：Biological cybernetics

authors： Davenport R,Jakobsson E,Gerber B

更新日期：1991-01-01 00:00:00

abstract：:To investigate the dynamic effects of external forces on the displacement of the otolith membrane and subsequent neuronal responses of otoliths, we performed numerical analyses of otolith membrane displacements. In these studies we included the full geometry of the human otolith maculae, including their 3D curvature. ...

journal_title：Biological cybernetics

authors： Jaeger R,Haslwanter T

更新日期：2004-03-01 00:00:00

abstract：:In the context of the models of structure from motion visual processing, we propose that the optic-flow field is a source of information for the perception of the curvature of a smooth surface in motion. In particular, it is shown how the spin variation (SV), a second spatial derivative of the retinal velocity field, ...

journal_title：Biological cybernetics

authors： Droulez J,Cornilleau-Pérès V

更新日期：1990-01-01 00:00:00

abstract：:Color vision in humans is independent over a wide range of the spectral composition of the illuminating light (Young 1807; Hering 1879). The retinex theory accounts for this color constancy by assuming that for each of the three waveband channels determined by the retinal cones a global lightness record of the scene i...

journal_title：Biological cybernetics

authors： Wehrhahn C

更新日期：1987-01-01 00:00:00

abstract：:A visual model for object detection is proposed. In order to make the detection ability comparable with existing technical methods for object detection, an evolution equation of neurons in the model is derived from the computational principle of active contours. The hierarchical structure of the model emerges naturall...

journal_title：Biological cybernetics

authors： Satoh S

更新日期：2006-09-01 00:00:00

abstract：:Brain resonance phenomena and induced rhythms in the brain recently gained importance in electroencephalographic, magnetoencephalographic and cellular studies (Başar and Bullock 1992). It was hypothesized that evoked potentials are superpositions of induced rhythms caused by resonance phenomena in neural populations (...

journal_title：Biological cybernetics

authors： Schürmann M,Başar E

更新日期：1994-01-01 00:00:00

abstract：:The previous companion paper describes the initial (seed) schema architecture that gives rise to the observed prey-catching behavior. In this second paper in the series we describe the fundamental adaptive processes required during learning after lesioning. Following bilateral transections of the hypoglossal nerve, an...

journal_title：Biological cybernetics

authors： Corbacho F,Nishikawa KC,Weerasuriya A,Liaw JS,Arbib MA

更新日期：2005-12-01 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：: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：:A model is presented which accounts for many characteristic response properties used to classify anuran ganglion cell types while being consistent with data concerning interneurons. In the model color is ignored and input stimuli are assumed to be only black and white at high contrast. We show that accurate ganglion c...

journal_title：Biological cybernetics

authors： Teeters JL,Arbib MA

更新日期：1991-01-01 00:00:00

abstract：:Small inhibitory neuronal circuits have long been identified as key neuronal motifs to generate and modulate the coexisting rhythms of various motor functions. Our paper highlights the role of a cellular switching mechanism to orchestrate such circuits. The cellular switch makes the circuits reconfigurable, robust, ad...

journal_title：Biological cybernetics

authors： Drion G,Franci A,Sepulchre R

更新日期：2019-04-01 00:00:00

abstract：:Within a wide class of multichannel models of the visual system it is suggested that spatial distributions of luminance are processed by the independent activation of grating detectors, or spatial frequency channels. Probability summation is often described in terms of Quick's nonlinear pooling model [Quick RF (1974) ...

journal_title：Biological cybernetics

authors： Meinhardt G

更新日期：1999-09-01 00:00:00

abstract：:The frequency sensitivity of weak periodic signal detection has been studied via numerical simulations for both a single neuron and a neuronal network. The dependence of the critical amplitude of the signal upon its frequency and a resonance between the intrinsic oscillations of a neuron and the signal could account f...

journal_title：Biological cybernetics

authors： Yu Y,Liu F,Wang W

更新日期：2001-03-01 00:00:00

abstract：:It is shown how field potentials due to neuronal membrane processes can be computed by means of a digital computer system. The essence of the method consists in evaluating a discrete expression for the field potential as a function of membrane potentials. This expression is considered as a three-dimensional convolutio...

journal_title：Biological cybernetics

authors： van Rotterdam A

更新日期：1980-01-01 00:00:00

abstract：:In bursting excitable cells such as pancreatic beta-cells and molluscan Aplysia neuron cells, intracellular Ca2+ ion plays a central role in various cellular functions. To understand the role of [Ca2+]i (the intracellular Ca2+ concentration) in electrical bursting, we formulate a mathematical model which contains a fe...

journal_title：Biological cybernetics

authors： Chay TR

更新日期：1990-01-01 00:00:00

abstract：:A novel artificial neural network, derived from neurobiological observations, is described and examples of its performance are presented. This DYnamically STable Associative Learning (DYSTAL) network associatively learns both correlations and anticorrelations, and can be configured to classify or restore patterns with...

journal_title：Biological cybernetics

authors： Alkon DL,Blackwell KT,Barbour GS,Rigler AK,Vogl TP

更新日期：1990-01-01 00:00:00

abstract：:It is shown that the models for the transduction process in photoreceptors which treat latency and amplification as integrated phenomena ("integrated models") yield time scales for single photon signals ("quantum bumps") which distinctly conflict with the experimentally observed ones for the ventral nerve photorecepto...

journal_title：Biological cybernetics

authors： Schnakenberg J

更新日期：1989-01-01 00:00:00

abstract：:In recent years, a great deal of research within the field of sound localization has been aimed at finding the acoustic cues that human listeners use to localize sounds and understanding the mechanisms by which they process these cues. In this paper, we propose a complementary approach by constructing an ideal-observe...

journal_title：Biological cybernetics

authors： Reijniers J,Vanderelst D,Jin C,Carlile S,Peremans H

更新日期：2014-04-01 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：:Rapidly adapting (RA) currents expressed in dorsal root ganglia somatosensory neurons reduce their amplitude in response to prolonged and/or repeated mechanical stimulation. Both inactivation of mechanotransducer channels and adaptation of the force acting on the channels have been suggested to independently decrease ...

journal_title：Biological cybernetics

authors： Prešern J,Škorjanc A,Rodič T,Benda J

更新日期：2016-12-01 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：:This paper concerns the processing of the outputs of the two opponent-color mechanisms in the human visual system. We present experimental evidence that opponent-color signals interact after joint modulation even though they are essentially independent under neutral steady adaptation and after exclusive modulation of ...

journal_title：Biological cybernetics

authors： Zaidi Q,Shapiro AG

更新日期：1993-01-01 00:00:00

abstract：:On the basis of paleological evidence, it has been suggested that biological evolution need not necessarily be characterized by gradual change. Rather, evolutionary history may display saltatory periods of rapid speciation alternating with periods of relative quiescence, the whole dynamic being called punctuated equil...

journal_title：Biological cybernetics

authors： Zimmerman ID,Rapp PE

更新日期：1989-01-01 00:00:00

abstract：:Spike-timing-dependent plasticity (STDP) determines the evolution of the synaptic weights according to their pre- and post-synaptic activity, which in turn changes the neuronal activity. In this paper, we extend previous studies of input selectivity induced by (STDP) for single neurons to the biologically interesting ...

journal_title：Biological cybernetics

authors： Gilson M,Burkitt AN,Grayden DB,Thomas DA,van Hemmen JL

更新日期：2009-08-01 00:00:00

abstract：:In internally coupled ears (ICE), the displacement of one eardrum creates pressure waves that propagate through air-filled passages in the skull, causing a displacement of the opposing eardrum and vice versa. In this review, a thorough mathematical analysis of the membranes, passages, and propagating pressure waves re...

journal_title：Biological cybernetics

authors： Vedurmudi AP,Young BA,van Hemmen JL

更新日期：2016-10-01 00:00:00

abstract：:This article analyzes the question of whether neuroscience allows for mathematical descriptions and whether an interaction between experimental and theoretical neuroscience can be expected to benefit both of them. It is argued that a mathematization of natural phenomena never happens by itself. First, appropriate key ...

journal_title：Biological cybernetics

authors： van Hemmen JL

更新日期：2014-10-01 00:00:00