abstract：:This paper concerns the use of tracking studies to test a theoretical account of the information processing performed by the human CNS during control of movement. The theory provides a bridge between studies of reaction time and continuous tracking. It is proposed that the human CNS includes neuronal circuitry to comp...

journal_title：Biological cybernetics

authors： Neilson PD,Neilson MD,O'Dwyer NJ

更新日期：1988-01-01 00:00:00

abstract：:We employ an optimal solution to both the "shape from motion problem" and the related problem of the estimation of self-movement on a purely optical basis to deduce practical rules of thumb for the limits of the optic flow information content in the presence of perturbation of the motion parallax field. The results ar...

journal_title：Biological cybernetics

authors： Koenderink JJ,van Doorn AJ

更新日期：1987-01-01 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：: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 have developed two algorithms that construct a simultaneous functional order in a collection of neural elements using purely functional relations. The input of the first algorithm is a matrix describing the total of covariances of signals carried by the members of the neural collection. The second algorithm proceed...

journal_title：Biological cybernetics

authors： Toet A,Blom J,Koenderink JJ

更新日期：1987-01-01 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：: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：: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：:Between the extreme views concerning ontogenesis (genetic vs. environmental determination), we use a moderate approach: a somehow pre-established neuronal model network reacts to activity deviations (reflecting input to be compensated), and stabilizes itself during a complex feed-back process. Morphogenesis is based o...

journal_title：Biological cybernetics

authors： Dammasch IE,Wagner GP,Wolff JR

更新日期：1986-01-01 00:00:00

abstract：:The order parameter equation for the relative phase of correlated hand movements, derived in a previous paper by Haken et al. (1985), is extended to a time-dependent stochastic differential equation. Its solutions are determined close to stationary points and for the transition region. Remarkably good agreement betwee...

journal_title：Biological cybernetics

authors： Schöner G,Haken H,Kelso JA

更新日期：1986-01-01 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：: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：:A neural network model of the mechanism of selective attention in visual pattern recognition is proposed and simulated on a digital computer. When a complex figure consisting of two patterns or more is presented to the model, it is segmented into individual patterns, and each pattern is recognized separately. Even if ...

journal_title：Biological cybernetics

authors： Fukushima K

更新日期：1986-01-01 00:00:00

abstract：:The light-growth response of the Phycomyces sporangiophore is a transient change of elongation rate in response to changes in ambient blue-light intensity. The white-noise method of nonlinear system identification (Wiener-Lee-Schetzen theory) has been applied to this response, and the results have been interpreted by ...

journal_title：Biological cybernetics

authors： Poe RC,Lipson ED

更新日期：1986-01-01 00:00:00

abstract：:Systems that generate spike outputs in response to continuous inputs abound in neurophysiology. The study of their dynamics with the use of systems analysis methods has been complicated by the difference in modality of the input and output signals. When the problem is placed in the framework of Wiener's theory in disc...

journal_title：Biological cybernetics

authors： Marmarelis VZ,Citron MC,Vivo CP

更新日期：1986-01-01 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：:The Craik-O'Brien illusion was measured for patterns of negative and positive contrast by a compensation method. The illusion of negative contrast (black teeth on uniform field) was stronger than that of positive one (white teeth). The amount of compensation increased linearly with increasing tooth width, but was nonl...

journal_title：Biological cybernetics

authors： Hamada J

更新日期：1985-01-01 00:00:00

abstract：:Two computer controlled experiments in an olfactory cross-modal matching task, using two-component odour mixtures matched against bar diagrams, were designed so that stimulus presentation was contingent upon the recent performance of the subject; stimuli that were relatively poorly (in experiment 1) or well (in experi...

journal_title：Biological cybernetics

authors： Gregson RA,Gates A

更新日期：1985-01-01 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：: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：:We report on the ability of human observers in judging their direction of translation from sparse, moving random dot patterns for varying extents of 3--D rotation. The observers have to discriminate possible axes of translation with angular separations of 2.5 deg or 5 deg. The field of view is either 20 X 20 deg or 10...

journal_title：Biological cybernetics

authors： Rieger JH,Toet L

更新日期：1985-01-01 00:00:00

abstract：:We propose a mathematical model of the human hypothalamus-anterior pituitary-thyroid system regulating basal metabolism, and practice computer simulation concerning primary thyropathy such as Graves' disease, hypothyroidism, T4-toxicosis and T3-toxicosis by use of this model. In order to throw light on properties of t...

journal_title：Biological cybernetics

authors： Hatakeyama T,Yagi H

更新日期：1985-01-01 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：:Earlier experimental studies by one of us (Kelso, 1981a, 1984) have shown that abrupt phase transitions occur in human hand movements under the influence of scalar changes in cycling frequency. Beyond a critical frequency the originally prepared out-of-phase, antisymmetric mode is replaced by a symmetrical, in-phase m...

journal_title：Biological cybernetics

authors： Haken H,Kelso JA,Bunz H

更新日期：1985-01-01 00:00:00

abstract：:We propose a new multilayered neural network model which has the ability of rapid self-organization. This model is a modified version of the cognitron (Fukushima, 1975). It has modifiable inhibitory feedback connections, as well as conventional modifiable excitatory feedforward connections, between the cells of adjoin...

journal_title：Biological cybernetics

authors： Miyake S,Fukushima K

更新日期：1984-01-01 00:00:00

abstract：:The behavior of the space-clamped Hodgkin-Huxley model has been studied using band-limited white noise (0-50 Hz) as the input membrane current and taking the output as a point process in time given by the peaks of the action potentials. The frequency response and coherence functions were measured by use of the Fourier...

journal_title：Biological cybernetics

authors： French AS

更新日期：1984-01-01 00:00:00

abstract：:Goal directed movements, executed by means of a manipulator with various dynamics, were investigated in order to establish to what extent the loading affects the executed movement. The desired movement concept, together with a describing function model for goal directed movements, was applied to parameterize the movem...

journal_title：Biological cybernetics

authors： Ruitenbeek JC

更新日期：1984-01-01 00:00:00

abstract：:The dynamic response of the human ankle joint to a bandlimited random torque perturbation superimposed on a constant bias torque is observed in normal human subjects. The applied torque input, the joint angular rotation output, and the electromyographic activity using surface electrodes from the extensor and the flexo...

journal_title：Biological cybernetics

authors： Agarwal GC,Goodarzi SM,O'Neill WD,Gottlieb GL

更新日期：1984-01-01 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：: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：: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：:A theoretical and experimental study on the detection of a square wave pattern of random dots is presented. Our theory applies to two-alternative forced choice experiments as well as to "seen"-"not seen" discrimination experiments. In our experiments we used the forced choice method. The theory provides a good descrip...

journal_title：Biological cybernetics

authors： Lelkens AM,Oppeneer PM

更新日期：1983-01-01 00:00:00

abstract：:The present report presents an attempt to define the physiological parameter used to describe "voice tremor" in psychological stress evaluating machines, and to find its sources. This parameter was found to be a low frequency (5-20 Hz) random process which frequency modulates the vocal cord waveform and (independently...

journal_title：Biological cybernetics

authors： Inbar GF,Eden G

更新日期：1983-01-01 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：:Beck (1972, 1973) hypothesized that textural segmentation occurs strongly on the basis of simple properties such as brightness, color, size, and the slopes of contours and lines of the elemental descriptors of a texture or textural elements. The experiment reported supports the hypothesis that specific stimulus featur...

journal_title：Biological cybernetics

authors： Beck J

更新日期：1983-01-01 00:00:00

abstract：:We present a general neural model for supervised learning of pattern categories which can resolve pattern classes separated by nonlinear, essentially arbitrary boundaries. The concept of a pattern class develops from storing in memory a limited number of class elements (prototypes). Associated with each prototype is a...

journal_title：Biological cybernetics

authors： Reilly DL,Cooper LN,Elbaum C

更新日期：1982-01-01 00:00:00

abstract：:In the present work a linear model for a pair of antagonistic muscles is analysed. Each constituent muscle in this model is identical to ones considered previously (Stein and Oğuztöreli, 1976). Analytical properties of the antagonistic muscles and dynamics of the system are described and some numerical results are dis...

journal_title：Biological cybernetics

authors： Oğuztöreli MN,Stein RB

更新日期：1982-01-01 00:00:00

abstract：:After a brief description of the main anatomical structures subserving the oculomotor responses during combined vestibular and optokinetic stimulations, a mathematical model is presented. With respect to a previous model by Schmid et al. (1980), a more accurate definition of the roles of the neural mechanisms involved...

journal_title：Biological cybernetics

authors： Buizza A,Schmid R

更新日期：1982-01-01 00:00:00

abstract：:The chemical control of respiration provides for the maintenance of energy and substance equilibrium primarily and for the homoeostatic stability of the chemical blood parameters secondarily. Based on results having been obtained from an appropriate state space model some findings on respiration can be reproduced. In ...

journal_title：Biological cybernetics

authors： Balla K

更新日期：1982-01-01 00:00:00

abstract：:A new association scheme which can still recall appropriate data when some key elements are missing (blank) is presented. The traditional associative memory models are designed to deal with complete (memorized) keys, but in the real world, key elements are often missing due to error, equipment failure, observation dif...

journal_title：Biological cybernetics

authors： Murakami K,Aibara T

更新日期：1982-01-01 00:00:00