Abstract:
:This paper concerns the processing of the outputs of the two opponent-color mechanisms in the human visual system. We present experimental evidence that opponent-color signals interact after joint modulation even though they are essentially independent under neutral steady adaptation and after exclusive modulation of each mechanism. In addition, prolonged modulation linearizes the response function of each mechanism. The changes in interaction serve to orthogonalize opponent signals with respect to the adapting modulation, and the changes in response functions serve to equalize the relative frequencies of different levels of response to the adapting modulation. Adaptive orthogonalization reduces sensitivity to the adapting color direction, improves sensitivity to the orthogonal direction, and predicts shifts in color appearance. Response equalization enhances effective contrast and explains the difference between the effects of adaptation to uniform versus temporally or spatially modulated stimuli.
journal_name
Biol Cybernjournal_title
Biological cyberneticsauthors
Zaidi Q,Shapiro AGsubject
Has Abstractpub_date
1993-01-01 00:00:00pages
415-28issue
5-6eissn
0340-1200issn
1432-0770journal_volume
69pub_type
杂志文章abstract::1. Results from the companion paper were incorporated into a physiologically realistic computer model of the three principal cell types (PD/AB, LP, PY) of the pyloric network in the stomatogastric ganglion. Parameters for the model were mostly calculated (sometimes estimated) from experimental data rather than fitting...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00337411
更新日期:1979-08-01 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
pub_type: 杂志文章
doi:10.1007/BF00205980
更新日期:1994-01-01 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
pub_type: 杂志文章
doi:10.1007/s00422-013-0569-z
更新日期:2013-12-01 00:00:00
abstract::Two different chaotic time series analysis methods--the correlation dimension and nonlinear forecasting--are introduced and then used to process the interspike intervals (ISI) of the action potential trains propagated along a single nerve fiber of the anesthetized rat. From the results, the conclusion is drawn that co...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s004220050422
更新日期:1998-02-01 00:00:00
abstract::Using a modified version of a phenomenological model for the dynamics of synaptic plasticity, we examine some recent experiments of Wu et al. [(2001) J Physiol 533:745-755]. We show that the model is quantitatively consistent with their experimental protocols producing long-term potentiation (LTP) and long-term depres...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-002-0376-4
更新日期:2003-03-01 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
pub_type: 杂志文章
doi:10.1007/BF00202786
更新日期:1995-01-01 00:00:00
abstract::We present a controls systems model of horizontal-plane head movements during perturbations of the trunk, which for the first time interfaces a model of the human head with neural feedback controllers representing the vestibulocollic (VCR) and the cervicocollic (CCR) reflexes. This model is homeomorphic such that mode...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s004220050297
更新日期:1996-10-01 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
pub_type: 杂志文章,评审
doi:10.1007/s00422-016-0696-4
更新日期:2016-10-01 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
pub_type: 杂志文章
doi:10.1007/s00422-014-0601-y
更新日期:2014-06-01 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
pub_type: 杂志文章
doi:10.1007/BF02414903
更新日期:1989-01-01 00:00:00
abstract::The present paper examines human hand impedance characteristics, including inertia and viscosity as well as stiffness, in multi-joint arm movements. While a subject maintains a given hand location, small external disturbances are applied to his hand by a manipulandum. The corresponding force-displacement vectors are m...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00199890
更新日期:1995-01-01 00:00:00
abstract::Small inhibitory neuronal circuits have long been identified as key neuronal motifs to generate and modulate the coexisting rhythms of various motor functions. Our paper highlights the role of a cellular switching mechanism to orchestrate such circuits. The cellular switch makes the circuits reconfigurable, robust, ad...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-018-0778-6
更新日期:2019-04-01 00:00:00
abstract::In many applications of signal processing, especially in communications and biomedicine, preprocessing is necessary to remove noise from data recorded by multiple sensors. Typically, each sensor or electrode measures the noisy mixture of original source signals. In this paper a noise reduction technique using independ...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-001-0298-6
更新日期:2002-04-01 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
pub_type: 杂志文章
doi:10.1007/BF00353957
更新日期:1982-01-01 00:00:00
abstract::The amount of power in different frequency bands of the electroencephalogram (EEG) carries information about the behavioral state of a subject. Hence, neurologists treating epileptic patients monitor the temporal evolution of the different bands. We propose a covariance-based method to detect and characterize epilepti...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-020-00840-y
更新日期:2020-10-01 00:00:00
abstract::Models built using mean data can represent only a very small percentage, or none, of the population being modeled, and produce different activity than any member of it. Overcoming this "averaging" pitfall requires measuring, in single individuals in single experiments, all of the system's defining characteristics. We ...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-012-0530-6
更新日期:2012-11-01 00:00:00
abstract::Neural field models have been successfully applied to model diverse brain mechanisms like visual attention, motor control, and memory. Most theoretical and modeling works have focused on the study of the dynamics of such systems under variations in neural connectivity, mainly symmetric connectivity among neurons. Howe...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-012-0544-0
更新日期:2013-04-01 00:00:00
abstract::Within a wide class of multichannel models of the visual system it is suggested that spatial distributions of luminance are processed by the independent activation of grating detectors, or spatial frequency channels. Probability summation is often described in terms of Quick's nonlinear pooling model [Quick RF (1974) ...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s004220050561
更新日期:1999-09-01 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
pub_type: 杂志文章
doi:10.1007/s004220100279
更新日期:2002-01-01 00:00:00
abstract::The stoichiometric and kinetic details of transmitter-receptor interaction (the number of conformations and the rate constants of conformation changes( in synaptic transmission have been investigated analyzing postsynaptic membrane noises by the aid of the fluctuation-dissipation theorem of stochastic chemical kinetic...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00337450
更新日期:1979-02-02 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
pub_type: 杂志文章
doi:10.1007/s004220000203
更新日期:2001-03-01 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
pub_type: 杂志文章
doi:10.1007/BF00336981
更新日期:1985-01-01 00:00:00
abstract::An approach to solving nonlinear control problems is illustrated by means of a layered associative network composed of adaptive elements capable of reinforcement learning. The first layer adaptively develops a representation in terms of which the second layer can solve the problem linearly. The adaptive elements compr...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00319977
更新日期:1982-01-01 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
pub_type: 杂志文章
doi:10.1007/BF00205969
更新日期:1988-01-01 00:00:00
abstract::Experimental studies have shown that responses of ventral intraparietal area (VIP) neurons specialize in head movements and the environment near the head. VIP neurons respond to visual, auditory, and tactile stimuli, smooth pursuit eye movements, and passive and active movements of the head. This study demonstrates ma...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-012-0491-9
更新日期:2012-07-01 00:00:00
abstract::The impact of dendritic geometry on somatopetal transfer of the current generated by steady uniform activation of excitatory synaptic conductance distributed over passive, or active (Hodgkin-Huxley type), dendrites was studied in simulated neurons. Such tonic activation was delivered to the uniform dendrite and to the...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s004220050473
更新日期:1998-09-01 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
pub_type: 杂志文章
doi:10.1007/BF00318721
更新日期:1987-01-01 00:00:00
abstract::Stochastic resonance is demonstrated in a simple energy detector model, as a non-monotonic relationship between signal-to-noise ratio and detection of a sinusoid signal in bandpass-limited Gaussian noise. The behaviour of the model detecting signals of various intensities and signal-to-noise ratios was investigated. S...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s004220000176
更新日期:2000-11-01 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
pub_type: 杂志文章
doi:10.1007/BF00364156
更新日期:1988-01-01 00:00:00
abstract::The concepts of pattern dynamics and their adaptation through behavioral information, developed in the context of rhythmic movement coordination, are generalized to describe discrete movements of single components and the coordination of multiple components in discrete movement. In a first step we consider only one sp...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00203449
更新日期:1990-01-01 00:00:00