Abstract：
:In this study, human arm movement was reconstructed from electromyography (EMG) signals using a forward dynamics model acquired by an artificial neural network within a modular architecture. Dynamic joint torques at the elbow and shoulder were estimated for movements in the horizontal plane from the surface EMG signals of 10 flexor and extensor muscles. Using only the initial conditions of the arm and the EMG time course as input, the network reliably reconstructed a variety of movement trajectories. The results demonstrate that posture maintenance and multijoint movements, entailing complex via-point specification and co-contraction of muscles, can be accurately computed from multiple surface EMG signals. In addition to the model's empirical uses, such as calculation of arm stiffness during motion, it allows evaluation of hypothesized computational mechanisms of the central nervous system such as virtual trajectory control and optimal trajectory planning.
journal_name
Biol Cybernjournal_title
Biological cyberneticsauthors
Koike Y,Kawato Mdoi
10.1007/BF00199465subject
Has Abstractpub_date
1995-09-01 00:00:00pages
291-300issue
4eissn
0340-1200issn
1432-0770journal_volume
73pub_type
杂志文章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
pub_type： 杂志文章
doi：10.1007/BF00320482
更新日期：1986-01-01 00:00:00
abstract：:Texture gradients are systematic variations in projected surface texture. It is expected that image variables such as texture density or size carry information about the surface orientation and distance. This article reexamines the information content of texture gradients and reviews the relevant psychophysics. Slant ...
journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/BF00336727
更新日期：1981-01-01 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
pub_type： 杂志文章
doi：10.1007/BF00336190
更新日期：1982-01-01 00:00:00
abstract：:This paper studies the performance of single-layered neural networks. This study begins with the performance of single-layered neural networks trained using the outer-product rule. The outer-product rule is a suboptimal learning scheme, resulting under certain assumptions from optimal least-squares training of single-...
journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/BF00203135
更新日期：1992-01-01 00:00:00
abstract：:Taste buds endure extreme changes in temperature, pH, osmolarity, so on. Even though taste bud cells are replaced in a short span, they contribute to consistent taste reception. Each taste bud consists of about 50 cells whose networks are assumed to process taste information, at least preliminarily. In this article, w...
journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/s00422-011-0447-5
更新日期：2011-07-01 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
pub_type： 杂志文章
doi：10.1007/BF00318425
更新日期：1986-01-01 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
pub_type： 杂志文章
doi：10.1007/s00422-012-0514-6
更新日期：2012-12-01 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
pub_type： 杂志文章
doi：10.1007/s004220050335
更新日期：1997-03-01 00:00:00
abstract：:Simulations of neural activity are commonly based on differential equations. We address the question what can be achieved with a simplified discrete model. The proposed model resembles artificial neural networks enriched with additional biologically inspired features. A neuron has several states, and the state transit...
journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/s00422-020-00826-w
更新日期：2020-06-01 00:00:00
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journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/s00422-014-0588-4
更新日期：2014-04-01 00:00:00
abstract：:This paper describes the aspects involved in modelling a multi-robot system from a human motor control perspective. The human motor control system has a hierarchical and decentralised structure, and building a control system for a multi-robot system that attains human features would require a decomposable model. Decom...
journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/s00422-003-0427-5
更新日期：2003-10-01 00:00:00
abstract：:A mathematical model of the central neural mechanisms of respiratory rhythm generation is developed. This model assumes that the respiratory cycle consists of three phases: inspiration, post-inspiration, and expiration. Five respiratory neuronal groups are included: inspiratory, late-inspiratory, post-inspiratory, exp...
journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/BF00203037
更新日期：1990-01-01 00:00:00
abstract：:We propose an approach for desynchronization in an ensemble of globally coupled neural oscillators. The impact of washout filter aided mean field feedback on population synchronization process is investigated. By blocking the Hopf bifurcation of the mean field, the controller desynchronizes the ensemble. The technique...
journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/s00422-009-0334-5
更新日期：2009-09-01 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
pub_type： 杂志文章
doi：10.1007/s00422-007-0159-z
更新日期：2007-08-01 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
pub_type： 杂志文章
doi：10.1007/BF00202449
更新日期：1990-01-01 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
pub_type： 杂志文章
doi：10.1007/s00422-001-0285-y
更新日期：2002-02-01 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
pub_type： 杂志文章
doi：10.1007/BF00217663
更新日期：1989-01-01 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
pub_type： 杂志文章
doi：10.1007/BF00336963
更新日期：1984-01-01 00:00:00
abstract：:A linear analogue network model is proposed to describe the neuronal circuit of the outer retina consisting of cones, horizontal cells, and bipolar cells. The model reflects previous physiological findings on the spatial response properties of these neurons to dim illumination and is expressed by physiological mechani...
journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/s004220050377
更新日期：1997-09-01 00:00:00
abstract：:Neuronal output properties for input stimuli that evoke a deterministic response can be efficiently described by the interspike-interval function (Awiszus 1988a). It is shown in this paper that there are stimuli for which both the Hodgkin-Huxley (HH-) model of an action potential encoding membrane (Hodgkin and Huxley ...
journal_title：Biological cybernetics
pub_type： 杂志文章,评审
doi：10.1007/BF00204770
更新日期：1989-01-01 00:00:00
abstract：:This article provides an introductory overview of the state of research on Hierarchical Bayesian Modeling in cognitive development. First, a brief historical summary and a definition of hierarchies in Bayesian modeling are given. Subsequently, some model structures are described based on four examples in the literatur...
journal_title：Biological cybernetics
pub_type： 杂志文章,评审
doi：10.1007/s00422-016-0686-6
更新日期：2016-06-01 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
pub_type： 杂志文章
doi：10.1007/BF00198088
更新日期：1991-01-01 00:00:00
abstract：:The detection of small radially symmetric targets was studied using a subthreshold summation paradigm. Small disc and disc-like patterns with diameters up to 0.60 were used for superposition on Bessel functions of zero order, subthreshold contrast and various spatial frequencies. Contrast interrelation functions prove...
journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/s004220170005
更新日期：2001-01-01 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
pub_type： 杂志文章
doi：10.1007/BF00365219
更新日期：1987-01-01 00:00:00
abstract：:A model is presented which accounts for many characteristic response properties used to classify anuran ganglion cell types while being consistent with data concerning interneurons. In the model color is ignored and input stimuli are assumed to be only black and white at high contrast. We show that accurate ganglion c...
journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/BF00201980
更新日期：1991-01-01 00:00:00
abstract：:This study is carried out on single (not averaged) recordings combining the spontaneous activity preceding the stimulus onset and the EP recorded upon acoustical stimulation. These recordings, which we call EEG-EPograms, are measured simultaneously from different subdural structures, such as the auditory cortex, media...
journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/BF00336853
更新日期：1979-09-01 00:00:00
abstract：:Neurons receive a continual stream of excitatory and inhibitory synaptic inputs. A conductance-based neuron model is used to investigate how the balanced component of this input modulates the amplitude of neuronal responses. The output spiking rate is well described by a formula involving three parameters: the mean mu...
journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/s00422-003-0408-8
更新日期：2003-08-01 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
pub_type： 杂志文章
doi：10.1007/BF00335348
更新日期：1982-01-01 00:00:00
abstract：:We present a biologically oriented model that accounts for left-right discrimination in the cockroach's escape behavior. The model includes the main groups of neurons found to be involved in the escape response. Each one of the included neurons is described by the actual processes taking place in an individual neuron ...
journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/s004220050546
更新日期：1999-08-01 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
pub_type： 杂志文章
doi：10.1007/s004220050510
更新日期：1999-02-01 00:00:00
