Computer simulation for hormones related to primary thyropathy.

abstract：:A mathematical muscle model is presented that relates neural control signals linearly to muscle force without violating important known physiological constraints, such as the size-principle (Henneman and Mendell 1981) and non-linear twitch summation (Burke et al. 1976). This linearity implies that the neural control s...

journal_title：Biological cybernetics

authors： Tax AA,Denier van der Gon JJ

更新日期：1991-01-01 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：: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：:We present a procedure that optimally adjusts specified parameters of a mathematical model to describe a set of measured data. The technique integrates a dynamic systems-simulation language with a robust algorithm for nonlinear parameter estimation, and it can be implemented on a microcomputer. Sensitivity functions a...

journal_title：Biological cybernetics

authors： Huebner WP,Saidel GM,Leigh RJ

更新日期：1990-01-01 00:00:00

abstract：:A receptive field constitutes a region in the visual field where a visual cell or a visual operator responds to visual stimuli. This paper presents a theory for what types of receptive field profiles can be regarded as natural for an idealized vision system, given a set of structural requirements on the first stages o...

journal_title：Biological cybernetics

authors： Lindeberg T

更新日期：2013-12-01 00:00:00

abstract：:It is shown that a convolution with certain reasonable receptive field (RF) profiles yields the exact partial derivatives of the retinal illuminance blurred to a specified degree. Arbitrary concatenations of such RF profiles yield again similar ones of higher order and for a greater degree of blurring. By replacing th...

journal_title：Biological cybernetics

authors： Koenderink JJ,van Doorn AJ

更新日期：1987-01-01 00:00:00

abstract：:A signal-tuned approach has been recently introduced for modeling stimulus-dependent cortical receptive fields. The approach is based on signal-tuned Gabor functions, which are Gaussian-modulated sinusoids whose parameters are obtained from a "tuning" signal. Given a stimulus to a cell, it is taken as the tuning signa...

journal_title：Biological cybernetics

authors： Torreão JR

更新日期：2015-10-01 00:00:00

abstract：:ICE stands for internally coupled ears. More than half of the terrestrial vertebrates, such as frogs, lizards, and birds, as well as many insects, are equipped with ICE that utilize an air-filled cavity connecting the two eardrums. Its effect is pronounced and twofold. On the basis of a solid experimental and mathemat...

journal_title：Biological cybernetics

authors： van Hemmen JL,Christensen-Dalsgaard J,Carr CE,Narins PM

更新日期：2016-10-01 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：:Motion control of musculoskeletal systems for functional electrical stimulation (FES) is a challenging problem due to the inherent complexity of the systems. These include being highly nonlinear, strongly coupled, time-varying, time-delayed, and redundant. The redundancy in particular makes it difficult to find an inv...

journal_title：Biological cybernetics

authors： Park H,Durand DM

更新日期：2008-12-01 00:00:00

abstract：:Within the field of motor control, there is no consensus on which kinematic and kinetic aspects of movements are planned or controlled. Perturbing goal-directed movements is a frequently used tool to answer this question. To be able to draw conclusions about motor control from kinematic responses to perturbations, a m...

journal_title：Biological cybernetics

authors： Pinter IJ,van Soest AJ,Bobbert MF,Smeets JB

更新日期：2012-10-01 00:00:00

abstract：:The mechanisms that control the limbs position during rhythmic voluntary oscillations were investigated in ten subjects, who were asked to synchronise the lower peak of their hand or foot rhythmic oscillations to a metronome beat. The efficacy of the "position control" was estimated by measuring the degree of synchron...

journal_title：Biological cybernetics

authors： Esposti R,Cavallari P,Baldissera F

更新日期：2007-08-01 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：: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：:The generation of informational sequences and their reorganization or reshaping is one of the most intriguing subjects for both neuroscience and the theory of autonomous intelligent systems. In spite of the diversity of sequential activities of sensory, motor, and cognitive neural systems, they have many similarities ...

journal_title：Biological cybernetics

authors： Rabinovich MI,Huerta R,Varona P,Afraimovich VS

更新日期：2006-12-01 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：:This work proposes a model of visual bottom-up attention for dynamic scene analysis. Our work adds motion saliency calculations to a neural network model with realistic temporal dynamics [(e.g., building motion salience on top of De Brecht and Saiki Neural Networks 19:1467-1474, (2006)]. The resulting network elicits ...

journal_title：Biological cybernetics

authors： Ramirez-Moreno DF,Schwartz O,Ramirez-Villegas JF

更新日期：2013-04-01 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：:A minimum mean square error (MMSE) estimation scheme is employed to identify the synaptic connectivity in neural networks. This new approach can substantially reduce the amount of data and the computational cost involved in the conventional correlation methods, and is suitable for both nonstationary and stationary neu...

journal_title：Biological cybernetics

authors： Yang X,Shamma SA

更新日期：1991-01-01 00:00:00

abstract：:Following Kohonen and using the Hebb principle, we define a self organizing stochastic process, which is a simple modelization of the retinotopy, i.e. the establishment of well-ordered connexions between the retina and the cortex. We give some mathematical results about convergence of this process. These results are i...

journal_title：Biological cybernetics

authors： Cottrell M,Fort JC

更新日期：1986-01-01 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 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：:Many neurons at the sensory periphery receive periodic input, and their activity exhibits entrainment to this input in the form of a preferred phase for firing. This article describes a modeling study of neurons which skip a random number of cycles of the stimulus between firings over a large range of input intensitie...

journal_title：Biological cybernetics

authors： Longtin A,Bulsara A,Pierson D,Moss F

更新日期：1994-01-01 00:00:00

abstract：:Sixty subjects were tested to assign orientation to ten dot patterns differing in their overall form and the number of dots in the pattern. The patterns were presented in four different positions in the visual field and their orientation was estimated in two ways. It was demonstrated that the assignment of orientation...

journal_title：Biological cybernetics

authors： Yakimoff N

更新日期：1981-01-01 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：:Arthropods as well as mammals are able to return straight home after a random search excursion under conditions that are designed to exclude all external cues. After a brief clarification of the terminology, two principal systems of information processing that can achieve this performance are introduced and analysed: ...

journal_title：Biological cybernetics

authors： Mittelstaedt H

更新日期：2000-09-01 00:00:00

abstract：:A nonstationary signal analysis technique is introduced, which regards an oscillatory physiological signal as a sum of its fragments, presented in the form of a fragmentary decomposition (FD). The virtue of FD is that it is free of the necessity to choose a priori the basis functions intended for signal analysis or sy...

journal_title：Biological cybernetics

authors： Melkonian D,Blumenthal T,Gordon E

更新日期：1999-11-01 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：:In motion-processing areas of the visual cortex in cats and monkeys, an anisotropic distribution of direction selectivities displays a preference for movements away from the fovea. This 'centrifugal bias' has been hypothetically linked to the processing of optic flow fields generated during forward locomotion. In this...

journal_title：Biological cybernetics

authors： Lappe M,Rauschecker JP

更新日期：1995-01-01 00:00:00

abstract：:In this work we show the application of a measure of entropy defined from the wavelet transform, namely the wavelet entropy (WS), to the study of event-related potentials (ERPs). WS was computed for ERPs recorded from nine healthy subjects with three different types of stimuli, among them target stimuli in a cognitive...

journal_title：Biological cybernetics

authors： Quiroga RQ,Rosso OA,Başar E,Schürmann M

更新日期：2001-04-01 00:00:00