Investigation of transmitter-receptor interactions by analyzing postsynaptic membrane noise using stochastic kinetics.

abstract：:Parameters in diffusion neuronal models are divided into two groups; intrinsic and input parameters. Intrinsic parameters are related to the properties of the neuronal membrane and are assumed to be known throughout the paper. Input parameters characterize processes generated outside the neuron and methods for their e...

journal_title：Biological cybernetics

authors： Lansky P,Ditlevsen S

更新日期：2008-11-01 00:00:00

abstract：:Based on the kinematics of goal-directed aiming movements in a reciprocal Fitts' task, a minimal limit cycle model is proposed that is capable of producing the behavior observed at levels of task difficulty ranging from 3 to 7. From graphical and statistical analyses of the phase planes, Hooke's planes and velocity pr...

journal_title：Biological cybernetics

authors： Mottet D,Bootsma RJ

更新日期：1999-04-01 00:00:00

abstract：:When human subjects are presented with a pair of visual targets that alternate periodically, they track the targets with rapid eye movements known as saccades. In previous work we demonstrated that at low pacing rates (<0.5 Hz), saccades have a latency of about 180 ms, and the latencies are uncorrelated from trial to ...

journal_title：Biological cybernetics

authors： Shelhamer M

更新日期：2005-07-01 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：:We consider a simple electronic circuit model of a single neuron. The neuron is assumed to be driven by an external signal comprising constant (dc) and random components. In addition, the nonlinearity parameter in the circuit is assumed to fluctuate, thereby giving rise to critical behavior including the onset of hyst...

journal_title：Biological cybernetics

authors： Bulsara AR,Boss RD,Jacobs EW

更新日期：1989-01-01 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：:The availability of a simple-to-use, automatic measurement system for noninvasive flow estimation is imperative, given the clinical demand for an acceptable noninvasive procedure rather than the standard invasive procedure of thermodilution. A method for calculating cardiac output from noninvasively derived pressure p...

journal_title：Biological cybernetics

authors： Redling JD,Akay M

更新日期：1997-08-01 00:00:00

abstract：:The present paper considers the relation between the shape of a triangle and probability of its recognition. An effect of triangle size on perception of its shape is examined in the first experiment. In the second the loci of eye fixations during triangle recognition task are recorded and analysed. A simulation model ...

journal_title：Biological cybernetics

authors： Pizlo Z

更新日期：1988-01-01 00:00:00

abstract：:The size of a pair of cortical ocular dominance columns determines a basic anatomical module of V-1 which Hubel and Wiesel have termed the hypercolumn. Does this correspond to a basic functional, or psychophysically measurable, module as well? This is the basic question addressed in the present paper. Since the ocular...

journal_title：Biological cybernetics

authors： Yeshurun Y,Schwartz EL

更新日期：1999-02-01 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：:We propose a model for the first stage of the cortical transformation of the visual image based on the principle that the cortex encodes the information with the minimum number of channels mathematically needed. We restrict our model to be consistent with the data on size adaptations, the known relationships of acuity...

journal_title：Biological cybernetics

authors： Sakitt B,Barlow HB

更新日期：1982-01-01 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：:Spikes in the membrane potential of neurons comprise the currency of information processing in the brain. The ability of neurons to convert any information present across their multiple inputs into a significant modification to the pattern of their emitted spikes depends on the rate at which they emit spikes. If the m...

journal_title：Biological cybernetics

authors： Miller P,Cannon J

更新日期：2019-04-01 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：: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 assessment of the variability of neuronal spike timing is fundamental to gain understanding of latency coding. Based on recent mathematical results, we investigate theoretically the impact of channel noise on latency variability. For large numbers of ion channels, we derive the asymptotic distribution of latency, ...

journal_title：Biological cybernetics

authors： Wainrib G,Thieullen M,Pakdaman K

更新日期：2010-07-01 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 work presents unified analyses of spatial and temporal visual information processing in a feed-forward network of neurons that obey membrane, or shunting equations. The feed-forward shunting network possesses properties that make it well suited for processing of static, spatial information. However, it is shown h...

journal_title：Biological cybernetics

authors： Gaudiano P

更新日期：1992-01-01 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：:The activation patterns underlying the electrical activity of the heart during atrial fibrillation (AF) are not entirely random. The aim of this study was to assess the local organization of the activation processes during AF by estimating the non-linear coupling between activation sequences (ASs) in two atrial sites....

journal_title：Biological cybernetics

authors： Censi F,Barbaro V,Bartolini P,Calcagnini G,Michelucci A,Cerutti S

更新日期：2001-09-01 00:00:00

abstract：:The application of an electronic real time emulator for biology-inspired pulse processing neural networks (BPN) to recognition and temporal tracking of discrete impulse patterns via delay adaptation is demonstrated. The electronic emulation includes biologically plausible features, such as asynchronous impulses, membr...

journal_title：Biological cybernetics

authors： Napp-Zinn H,Jansen M,Eckmiller R

更新日期：1996-05-01 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：:Isolated and cultured neonatal cardiac myocytes contract spontaneously and cyclically, and have the properties of a non-linear oscillator. In this study, we have analyzed the relationship between the fluctuation of contraction rhythm of spontaneously beating cultured cardiac myocytes, and the coupling strength among t...

journal_title：Biological cybernetics

authors： Yamauchi Y,Harada A,Kawahara K

更新日期：2002-02-01 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：:Among the various possible criteria guiding eye movement selection, we investigate the role of position uncertainty in the peripheral visual field. In particular, we suggest that, in everyday life situations of object tracking, eye movement selection probably includes a principle of reduction of uncertainty. To evalua...

journal_title：Biological cybernetics

authors： Colas F,Flacher F,Tanner T,Bessière P,Girard B

更新日期：2009-03-01 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：: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：:A system of coupled bistable Hopf oscillators with an external periodic input source was used to model the ability of interacting neural populations to synchronize and desynchronize in response to variations of the input signal. We propose that, in biological systems, the settings of internal and external coupling str...

journal_title：Biological cybernetics

authors： Schwarz J,Sieck A,Dangelmayr G,Stevens A

更新日期：2000-03-01 00:00:00

abstract：:It is shown how field potentials due to neuronal membrane processes can be computed by means of a digital computer system. The essence of the method consists in evaluating a discrete expression for the field potential as a function of membrane potentials. This expression is considered as a three-dimensional convolutio...

journal_title：Biological cybernetics

authors： van Rotterdam A

更新日期：1980-01-01 00:00:00

abstract：:We have previously tried to explain perceptual inference and learning under a free-energy principle that pursues Helmholtz's agenda to understand the brain in terms of energy minimization. It is fairly easy to show that making inferences about the causes of sensory data can be cast as the minimization of a free-energy...

journal_title：Biological cybernetics

authors： Friston KJ,Daunizeau J,Kilner J,Kiebel SJ

更新日期：2010-03-01 00:00:00