Sequences of predictive eye movements form a fractional Brownian series--implications for self-organized criticality in the oculomotor system.

abstract：:We have attempted to reconcile the different patterns of distribution of interspike intervals that are found in motoneurones made to discharge by intracellular injection of constant current in reduced animal preparations and by voluntary control in human subjects. We recorded long spike trains from single motor units ...

journal_title：Biological cybernetics

authors： Poliakov AV,Miles TS,Nordstrom MA

更新日期：1995-07-01 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：:Several formulations of correlation-based Hebbian learning are reviewed. On the presynaptic side, activity is described either by a firing rate or by presynaptic spike arrival. The state of the postsynaptic neuron can be described by its membrane potential, its firing rate, or the timing of backpropagating action pote...

journal_title：Biological cybernetics

authors： Gerstner W,Kistler WM

更新日期：2002-12-01 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：: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：:Within a linear field approach, an architectural model for simple cell direction selectivity in the visual cortex is proposed. The origin of direction selectivity is related to recurrent intracortical interactions with a spatially asymmetric character along the axis of stimulus motion. No explicit asymmetric temporal ...

journal_title：Biological cybernetics

authors： Sabatini SP,Solari F

更新日期：1999-03-01 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：:In neuronal networks, the changes of synaptic strength (or weight) performed by spike-timing-dependent plasticity (STDP) are hypothesized to give rise to functional network structure. This article investigates how this phenomenon occurs for the excitatory recurrent connections of a network with fixed input weights tha...

journal_title：Biological cybernetics

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

更新日期：2009-12-01 00:00:00

abstract：:We extend a quantitative model for low-voltage, slow-wave excitability based on the T-type calcium current (Wang et al. 1991) by juxtaposing it with a Hodgkin-Huxley-like model for fast sodium spiking in the high voltage regime to account for the distinct firing modes of thalamic neurons. We employ bifurcation analysi...

journal_title：Biological cybernetics

authors： Rush ME,Rinzel J

更新日期：1994-01-01 00:00:00

abstract：:This paper continues the investigation of a three-loop representation of the segmental muscle stretch reflex system introduced in a preceding communication. Frequency response characteristics were computed for open-loop conditions, control and disturbance signal inputs under a variety of conditions: (i) "in parallel" ...

journal_title：Biological cybernetics

authors： Koehler W,Windhorst U

更新日期：1981-01-01 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：: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：:The spinal neural networks of larval zebrafish (Danio rerio) generate a variety of movements such as escape, struggling, and swimming. Various mechanisms at the neural and network levels have been proposed to account for switches between these behaviors. However, there are currently no detailed demonstrations of such ...

journal_title：Biological cybernetics

authors： Kuo PD,Eliasmith C

更新日期：2005-09-01 00:00:00

abstract：:The membrane excitability changes as well as the underlying mechanisms of these changes in a normal and in a systematically paranodally demyelinated nerve fibre have been investigated by paired stimulation during the first 30 ms of the recovery cycle. The ionic current kinetics determining the observed changes in the ...

journal_title：Biological cybernetics

authors： Stephanova DI

更新日期：1989-01-01 00:00:00

abstract：:The lateral-line system is a unique facility of aquatic animals to locate predator, prey, or conspecifics. We present a detailed model of how the clawed frog Xenopus, or fish, can localize submerged moving objects in three dimensions by using their lateral-line system. In so doing we develop two models of a slightly d...

journal_title：Biological cybernetics

authors： Franosch JM,Sichert AB,Suttner MD,van Hemmen JL

更新日期：2005-10-01 00:00:00

abstract：:Much evidence suggests that the mammalian thalamus is not merely a set of nuclei relaying signals to the cerebral cortex, but is engaged in two-way interplay with it. Three important features constrain ideas about the nature of this interplay: (i) thalamic projection neurones lack local axon collaterals; (ii) most cor...

journal_title：Biological cybernetics

authors： Miller R

更新日期：1996-09-01 00:00:00

abstract：:This paper describes how a synergy made up of a pair of agonist and antagonist systems involved in the production of a rapid movement can control movement time. A quadratic law is derived to predict the movement time as a function of the various parameters describing the neuromuscular synergy. Conditions for a simplif...

journal_title：Biological cybernetics

authors： Plamondon R

更新日期：1995-01-01 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：: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：:Most common motor acts involve highly redundant effector systems. Understanding how such systems are controlled by the nervous system is a long-standing scientific challenge. Most proposals for solving this problem are based on the assumption that a particular solution, which optimizes additional constraints, is selec...

journal_title：Biological cybernetics

authors： Scholz JP,Danion F,Latash ML,Schöner G

更新日期：2002-01-01 00:00:00

abstract：:The notion that biological systems come to embody optimal solutions seems consistent with the competitive drive of evolution. It has been used to interpret many examples of sensorimotor behavior. It is attractive from the viewpoint of control engineers because it solves the redundancy problem by identifying the one op...

journal_title：Biological cybernetics

authors： Loeb GE

更新日期：2012-12-01 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：:Estimating the behavior of a network of neurons requires accurate models of the individual neurons along with accurate characterizations of the connections among them. Whereas for a single cell, measurements of the intracellular voltage are technically feasible and sufficient to characterize a useful model of its beha...

journal_title：Biological cybernetics

authors： Knowlton C,Meliza CD,Margoliash D,Abarbanel HD

更新日期：2014-06-01 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：: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：: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：: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：:Using the theory of random point processes, a method is presented whereby functional relationships between neurons can be detected and modeled. The method is based on a point process characterization involving stochastic intensities and an additive rate function model. Estimates are based on the maximum likelihood (ML...

journal_title：Biological cybernetics

authors： Chornoboy ES,Schramm LP,Karr AF

更新日期：1988-01-01 00:00:00

abstract：:Under a 90 degrees rotation of motor space relative to visual space, human two-dimensional aiming movements frequently take the form of smooth arcs such as spirals and semi-circles. A time-independent differential equation explains this tendency in terms of a rotation-induced vector field made up, at each point in the...

journal_title：Biological cybernetics

authors： Cunningham HA,Vardi I

更新日期：1990-01-01 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