Biophysical model of synaptic plasticity dynamics.

abstract：:Multiplying memory span by mental speed, we obtain the information entropy of short-term memory capacity, which is rate-limiting for cognitive functions and corresponds with EEG power spectral density. The number of EEG harmonics (n = 1, 2,..., 9) is identical with memory span, and the eigenvalues of the EEG impulse r...

journal_title：Biological cybernetics

authors： Weiss V

更新日期：1992-01-01 00:00:00

abstract：:Neurons receive a continual stream of excitatory and inhibitory synaptic inputs. A conductance-based neuron model is used to investigate how the balanced component of this input modulates the amplitude of neuronal responses. The output spiking rate is well described by a formula involving three parameters: the mean mu...

journal_title：Biological cybernetics

authors： Burkitt AN,Meffin H,Grayden DB

更新日期：2003-08-01 00:00:00

abstract：:The action potentials (impulses) produced by pairs of neighboring retinal ganglion cells often show a tendency either to fire in close temporal synchrony or to avoid temporal synchrony. This cross-correlation (a rate of "coincidences" that differs from that expected by chance) has been exploited as a window into retin...

journal_title：Biological cybernetics

authors： Levine MW

更新日期：2004-09-01 00:00:00

abstract：:A functional model of target selection in the saccadic system is presented, incorporating elements of visual processing, motor planning, and motor control. We address the integration of visual information with pre-information, which is provided by manipulating the probability that a target appears at a certain locatio...

journal_title：Biological cybernetics

authors： Kopecz K,Schöner G

更新日期：1995-06-01 00:00:00

abstract：:Recent results demonstrate techniques for fully quantitative, statistical inference of the dynamics of individual neurons under the Hodgkin-Huxley framework of voltage-gated conductances. Using a variational approximation, this approach has been successfully applied to simulated data from model neurons. Here, we use t...

journal_title：Biological cybernetics

authors： Meliza CD,Kostuk M,Huang H,Nogaret A,Margoliash D,Abarbanel HD

更新日期：2014-08-01 00:00:00

abstract：:Reported here are the results from two experiments designed to investigate Mateeff and Gourevich's (1983, 1984) claim that adult observers make large constant errors when judging the direction of briefly presented peripheral targets, with respect to a continuously visible scale. Experiment 1 involved a virtually exact...

journal_title：Biological cybernetics

authors： Mapp AP,Barbeito R,Bedell HE,Ono H

更新日期：1989-01-01 00:00:00

abstract：:Cortical circuits have been proposed to encode information by forming stable spatially structured attractors. Experimentally in the primary somatosensory cortex of the monkey, temporally invariant stimuli lead to spatially structured activity patterns. The purpose of this work is to study a recurrent cortical neural n...

journal_title：Biological cybernetics

authors： Gutkin BS,Smith CE

更新日期：2000-06-01 00:00:00

abstract：:In this paper we present a systematic method for generating simulations of nonstationary EEG. Such simulations are needed, for example, in the evaluation of tracking algorithms. First a state evolution process is simulated. The states are initially represented as segments of stationary autoregressive processes which a...

journal_title：Biological cybernetics

authors： Kaipio JP,Karjalainen PA

更新日期：1997-05-01 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：:How do biological agents plan and organise a smooth accurate path to shift from one smooth mode of behaviour to another as part of graceful movement that is both plastic and controlled? This paper addresses the question in conducting a novel shape analysis of approach and adjustment phases in rapid voluntary target ai...

journal_title：Biological cybernetics

authors： Weir MK,Wale AP

更新日期：2011-08-01 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：:Temporal information processing was studied in humans attempting to tap a key in synchrony with a metronome whose base period was subjected to subliminal random changes. Statistical measures of the sequential timing of metronome and key-tap events were compared with similar time series generated by computer-simulated ...

journal_title：Biological cybernetics

authors： Hary D,Moore GP

更新日期：1987-01-01 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：:One possible strategy for the solution of the correspondence problem of stereo matching is the coarse-to-fine mechanism: The matching process starts with a lowpass-filtered version of the stereogram where only a few, high-contrast image features can be extracted and the probability of false matches is therefore low. I...

journal_title：Biological cybernetics

authors： Mallot HA,Gillner S,Arndt PA

更新日期：1996-02-01 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：: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：:Taste buds endure extreme changes in temperature, pH, osmolarity, so on. Even though taste bud cells are replaced in a short span, they contribute to consistent taste reception. Each taste bud consists of about 50 cells whose networks are assumed to process taste information, at least preliminarily. In this article, w...

journal_title：Biological cybernetics

authors： Tateno K,Igarashi J,Ohtubo Y,Nakada K,Miki T,Yoshii K

更新日期：2011-07-01 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：: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：:An intracellular recording made from the retinal luminosity horizontal cell (LHC) demonstrated that repetitive red flashes enhanced the cell's responsiveness to red stimulus and depressed its responsiveness to green stimulus and that repetitive green flashes suppressed the cell's red response but produced little chang...

journal_title：Biological cybernetics

authors： Hu JF,Liu Y,Liang PJ

更新日期：2003-05-01 00:00:00

abstract：:The human optokinetic response to a horizontally moving stripped pattern surrounding the subject was investigated under quasi-open and closed loop conditions. Open loop conditions were produced by the addition of an external signal from measured slow phase eye velocity to stripe velocity. A comparison of open and clos...

journal_title：Biological cybernetics

authors： Böhmer A,Allum JH

更新日期：1981-01-01 00:00:00

abstract：:Saccadic averaging is the phenomenon that two simultaneously presented retinal inputs result in a saccade with an endpoint located on an intermediate position between the two stimuli. Recordings from neurons in the deeper layers of the superior colliculus have revealed neural correlates of saccade averaging, indicatin...

journal_title：Biological cybernetics

authors： Krommenhoek KP,Wiegerinck WA

更新日期：1998-06-01 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：: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：:In vision of everyday scenes, features requiring detection are frequently observed in the presence of suprathreshold background structures. Detection of such features is a contrast discrimination task and is often necessary for the subsequent process of recognition. In order to provide a description of this task, cont...

journal_title：Biological cybernetics

authors： Burton GJ

更新日期：1981-01-01 00:00:00

abstract：:In this study, human arm movement was reconstructed from electromyography (EMG) signals using a forward dynamics model acquired by an artificial neural network within a modular architecture. Dynamic joint torques at the elbow and shoulder were estimated for movements in the horizontal plane from the surface EMG signal...

journal_title：Biological cybernetics

authors： Koike Y,Kawato M

更新日期：1995-09-01 00:00:00

abstract：:The experimental identification of a non-linear biologic transducer is often approached via consideration of its response to a stochastic test ensemble, such as Gaussian white noise (Marmarelis and Marmarelis 1978). In this approach, the input-output relationship a deterministic transducer is described by an orthogona...

journal_title：Biological cybernetics

authors： Victor JD

更新日期：1987-01-01 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：: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：:Evoked potential waveforms are generally of a dynamic, transient character. Consequently, their spectral energy distribution cannot be adequately described by time-invariant representations, such as the power density spectrum. Obviously, a spectro-temporal description is needed. Appropriate means for obtaining such de...

journal_title：Biological cybernetics

authors： de Weerd JP,Kap JI

更新日期：1981-01-01 00:00:00