Saltatory transitions are a naturally occurring property of evolving systems.

abstract：:Two-dimensional scalar fields (e. g. pictures) are often described by way of a linear superposition of simple base functions. It is argued that such decompositions are often unnatural in the sense that the decomposition takes no regard of the structure of the field and it may happen that the parts are more complicated...

journal_title：Biological cybernetics

authors： Koenderink JJ,van Doorn AJ

更新日期：1979-08-01 00:00:00

abstract：:We consider the description of a nonlinear stochastic transduction in terms of its input/output distribution. We construct a sequence of approximating maximum-entropy estimates from a finite set of input/output observations. This procedure extends the Wiener theory to the analysis of nonlinear stochastic transducers a...

journal_title：Biological cybernetics

authors： Victor JD,Johannesma P

更新日期：1986-01-01 00:00:00

abstract：:Firing-rate models describing neural-network activity can be formulated in terms of differential equations for the synaptic drive from neurons. Such models are typically derived from more general models based on Volterra integral equations assuming exponentially decaying temporal coupling kernels describing the coupli...

journal_title：Biological cybernetics

authors： Nordbø O,Wyller J,Einevoll GT

更新日期：2007-09-01 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：:A new method is presented for quantitative evaluation of single-sweep phase and amplitude electro-encephalogram (EEG) characteristics that is a more informative approach in comparison with conventional signal averaging. In the averaged potential, phase-locking and amplitude effects of the EEG response cannot be separa...

journal_title：Biological cybernetics

authors： Kolev V,Yordanova J

更新日期：1997-03-01 00:00:00

abstract：:Movement of multiple segment limbs requires generation of appropriate joint torques which include terms arising from dynamic interactions among the moving segments as well as from such external forces as gravity. The interaction torques, arising from inertial, centripetal, and Coriolis forces, are not present for sing...

journal_title：Biological cybernetics

authors： Hollerbach MJ,Flash T

更新日期：1982-01-01 00:00:00

abstract：:An "adaptation model" having two stages is introduced and its mathematical properties are examined. The two stages are the "adaptive process" (parameter Kb), which has bleaching-type kinetics, and the "response function" (parameters Kr and n), which incorporates response saturation. In order to study the increment thr...

journal_title：Biological cybernetics

authors： Dawis SM

更新日期：1978-09-28 00:00:00

abstract：:This study is concerned with synaptic reorganization in local neuronal networks. Within networks of 30 neurons, an initial disequilibrium in connectivity has to be compensated by reorganization of synapses. Such plasticity is not a genetically determined process, but depends on results of neuronal interaction. Neurobi...

journal_title：Biological cybernetics

authors： Dammasch IE,Wagner GP,Wolff JR

更新日期：1988-01-01 00:00:00

abstract：:In a seminal paper, Witkin (1981) derived a model of surface slant and tilt recovery based on the statistics of the orientations of texture elements (texels) on a planar surface. This model made use of basic mathematical properties of probability distributions to formulate a posterior distribution on slant and tilt gi...

journal_title：Biological cybernetics

authors： Warren PA,Mamassian P

更新日期：2010-09-01 00:00:00

abstract：:An initial test for a theory of lateral hypothalamic regulation of electrocortical activity is undertaken. The theory supposes lateral hypothalamic input directly or indirectly damps telencephalic resonances involving linear wave phenomena, enabling this pathway to act as parametric control of information processing i...

journal_title：Biological cybernetics

authors： Wright JJ,Kydd RR

更新日期：1984-01-01 00:00:00

abstract：:Involuntary eye movements were recorded during threshold detection tasks under various experimental conditions. The data were analyzed for interdependencies between stimulus parameters, detection performance, and oculomotor behaviour. The data demonstrate that under certain conditions, saccadic parameters are adaptive...

journal_title：Biological cybernetics

authors： Deubel H,Elsner T

更新日期：1986-01-01 00:00:00

abstract：:Illumination allows solid object perception to be obtained and depicted by a shading pattern produced by lighting. The shading cue, as one of solid perception cues (Gibson 1979), was investigated in regard to a white corrugated wave shape, using computer graphic device: Tospix-2. The reason the corrugated wave was cho...

journal_title：Biological cybernetics

authors： Nameda N

更新日期：1988-01-01 00:00:00

abstract：:The aim of this paper is to summarize and to compare some known mathematical models of orientation perception in random dot patterns and to propose new solutions of this question. The model adequacy is judged from the previously obtained experimental results. Apart from the models based on some simple function of the ...

journal_title：Biological cybernetics

authors： Mates J,Lánský P,Yakimoff N

更新日期：1990-01-01 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：:A method is proposed to determine the rigid structure as well as the three dimensional motion of an object from a sequence of orthographically projected images. It is assumed that the velocities as well as the positions of the points attached to the object are observable in the images. The "instantaneous rigidity cond...

journal_title：Biological cybernetics

authors： Sugie N,Inagaki H

更新日期：1984-01-01 00:00:00

abstract：:In the current research, the muscle equivalent linear damping coefficient which is introduced as the force-velocity relation in a muscle model and the corresponding time constant are investigated. In order to reach this goal, a 1D skeletal muscle model was used. Two characterizations of this model using a linear force...

journal_title：Biological cybernetics

authors： Ovesy M,Nazari MA,Mahdavian M

更新日期：2016-02-01 00:00:00

abstract：:We present a controls systems model of horizontal-plane head movements during perturbations of the trunk, which for the first time interfaces a model of the human head with neural feedback controllers representing the vestibulocollic (VCR) and the cervicocollic (CCR) reflexes. This model is homeomorphic such that mode...

journal_title：Biological cybernetics

authors： Peng GC,Hain TC,Peterson BW

更新日期：1996-10-01 00:00:00

abstract：:This paper deals with characterization and modelling of human handwriting motion from two forearm muscle activity signals, called electromyography signals (EMG). In this work, an experimental approach was used to record the coordinates of a pen tip moving on the (x, y) plane and EMG signals during the handwriting act....

journal_title：Biological cybernetics

authors： Chihi I,Abdelkrim A,Benrejeb M

更新日期：2016-02-01 00:00:00

abstract：:Synaptic release was simulated using a Simulink sequential storage model with three vesicular pools. Modeling was modular and easily extendable to the systems with greater number of vesicular pools, parallel input, or time-varying parameters. Given an input (short or long tetanic trains, patterned or random stimulatio...

journal_title：Biological cybernetics

authors： Aristizabal F,Glavinovic MI

更新日期：2004-01-01 00:00:00

abstract：:The correspondence between afferent discharges and sinusoidal length modulations (0.2--10 cps, under 10% of the natural length variations) was studied in isolated fast-adapting stretch receptor organs (FAO) of crayfish, largely using average displays of rate vs. length (or derivatives) along the cycle. Rate modulation...

journal_title：Biological cybernetics

authors： Martínez OD,Kohn AF,Segundo JP

更新日期：1983-01-01 00:00:00

abstract：:Neurons transmit information as action potentials or spikes. Due to the inherent randomness of the inter-spike intervals (ISIs), probabilistic models are often used for their description. Cumulative damage (CD) distributions are a family of probabilistic models that has been widely considered for describing time-relat...

journal_title：Biological cybernetics

authors： Leiva V,Tejo M,Guiraud P,Schmachtenberg O,Orio P,Marmolejo-Ramos F

更新日期：2015-10-01 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：:This paper deals with the problem of representing and generating unconstrained aiming movements of a limb by means of a neural network architecture. The network produced time trajectories of a limb from a starting posture toward targets specified by sensory stimuli. Thus the network performed a sensory-motor transform...

journal_title：Biological cybernetics

authors： Massone L,Bizzi E

更新日期：1989-01-01 00:00:00

abstract：:Texture gradients are systematic variations in projected surface texture. It is expected that image variables such as texture density or size carry information about the surface orientation and distance. This article reexamines the information content of texture gradients and reviews the relevant psychophysics. Slant ...

journal_title：Biological cybernetics

authors： Stevens KA

更新日期：1981-01-01 00:00:00

abstract：:This study proposes an adaptive control architecture based on an accurate regression method called Locally Weighted Projection Regression (LWPR) and on a bio-inspired module, such as a cerebellar-like engine. This hybrid architecture takes full advantage of the machine learning module (LWPR kernel) to abstract an opti...

journal_title：Biological cybernetics

authors： Tolu S,Vanegas M,Luque NR,Garrido JA,Ros E

更新日期：2012-10-01 00:00:00

abstract：:This article provides an introductory overview of the state of research on Hierarchical Bayesian Modeling in cognitive development. First, a brief historical summary and a definition of hierarchies in Bayesian modeling are given. Subsequently, some model structures are described based on four examples in the literatur...

journal_title：Biological cybernetics

authors： Glassen T,Nitsch V

更新日期：2016-06-01 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：:Voltage-clamp of excitable membrane allows the measurement of membrane currents associated with electrical potential changes across the membrane. However, it has been impossible in practice to apply the conventional analog feedback voltage-clamp circuits to single electrode voltage clamping in central neurons. The rea...

journal_title：Biological cybernetics

authors： Kawato M,Etoh M,Oda Y,Tsukahara N

更新日期：1985-01-01 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：:The relationship between disparity and ocular vergence was investigated under closed-loop as well as under open-loop viewing conditions. First we examined whether vergence responded similarly to disparity presented under open-loop and closed-loop conditions. Similar response were observed in both conditions. The direc...

journal_title：Biological cybernetics

authors： Pobuda M,Erkelens CJ

更新日期：1993-01-01 00:00:00