Abstract:
:This paper deals with characterization and modelling of human handwriting motion from two forearm muscle activity signals, called electromyography signals (EMG). In this work, an experimental approach was used to record the coordinates of a pen tip moving on the (x, y) plane and EMG signals during the handwriting act. The main purpose is to design a new mathematical model which characterizes this biological process. Based on a multi-model approach, this system was originally developed to generate letters and geometric forms written by different writers. A Recursive Least Squares algorithm is used to estimate the parameters of each sub-model of the multi-model basis. Simulations show good agreement between predicted results and the recorded data.
journal_name
Biol Cybernjournal_title
Biological cyberneticsauthors
Chihi I,Abdelkrim A,Benrejeb Mdoi
10.1007/s00422-015-0670-6subject
Has Abstractpub_date
2016-02-01 00:00:00pages
17-30issue
1eissn
0340-1200issn
1432-0770pii
10.1007/s00422-015-0670-6journal_volume
110pub_type
杂志文章abstract::This study is concerned with synaptic reorganization in local neuronal networks. Within networks of 30 neurons, an initial disequilibrium in connectivity has to be compensated by reorganization of synapses. Such plasticity is not a genetically determined process, but depends on results of neuronal interaction. Neurobi...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00364134
更新日期:1988-01-01 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
pub_type: 杂志文章
doi:10.1007/BF00357923
更新日期:1984-01-01 00:00:00
abstract::The aim of this paper is to summarize and to compare some known mathematical models of orientation perception in random dot patterns and to propose new solutions of this question. The model adequacy is judged from the previously obtained experimental results. Apart from the models based on some simple function of the ...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00202455
更新日期:1990-01-01 00:00:00
abstract::The human optokinetic response to a horizontally moving stripped pattern surrounding the subject was investigated under quasi-open and closed loop conditions. Open loop conditions were produced by the addition of an external signal from measured slow phase eye velocity to stripe velocity. A comparison of open and clos...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00453373
更新日期:1981-01-01 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
pub_type: 杂志文章
doi:10.1007/BF00318425
更新日期:1986-01-01 00:00:00
abstract::The problems related to kinematic redundancy in both task and joint space were investigated for arm prehension movements in this paper. After a detailed analysis of kinematic redundancy of the arm, it is shown that the redundancy problem is ill posed only for the control of hand orientation. An experiment was then des...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s004220050538
更新日期:1999-06-01 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::The high speed of saccades means that they cannot be guided by visual feedback, so that any saccadic control system must know in advance the correct output signals to fixate a particular retinal position. To investigate neural-net architectures for learning this inverse-kinematics problem we simulated a 4 deg-of-freed...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00196450
更新日期:1991-01-01 00:00:00
abstract::Flies have the capability to visually track small moving targets, even across cluttered backgrounds. Previous computational models, based on figure detection (FD) cells identified in the fly, have suggested how this may be accomplished at a neuronal level based on information about relative motion between the target a...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-004-0518-y
更新日期:2004-12-01 00:00:00
abstract::Synchronization of the oscillatory discharge of cortical neurons could be a part of the mechanism that is involved in cortical information processing. On the assumption that the basic functional unit is the column composed of local excitatory and inhibitory cells and generating oscillatory neural activity, a network m...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00202761
更新日期:1994-01-01 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::Simulation results of bistable perception due to ambiguous visual stimuli are presented which are obtained with a behavioral nonlinear dynamics model using perception-attention-memory coupling. This model provides an explanation of recent experimental results of Gao et al. (Cogn Process 7:105-112, 2006a) and it suppor...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-010-0388-4
更新日期:2010-09-01 00:00:00
abstract::In recent years, a great deal of research within the field of sound localization has been aimed at finding the acoustic cues that human listeners use to localize sounds and understanding the mechanisms by which they process these cues. In this paper, we propose a complementary approach by constructing an ideal-observe...
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::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::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 article introduces several fundamental concepts in information theory from the perspective of their origins in engineering. Understanding such concepts is important in neuroscience for two reasons. Simply applying formulae from information theory without understanding the assumptions behind their definitions can ...
journal_title:Biological cybernetics
pub_type: 杂志文章,评审
doi:10.1007/s00422-011-0451-9
更新日期:2011-07-01 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::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
pub_type: 杂志文章
doi:10.1007/BF00336183
更新日期:1984-01-01 00:00:00
abstract::Many neurons at the sensory periphery receive periodic input, and their activity exhibits entrainment to this input in the form of a preferred phase for firing. This article describes a modeling study of neurons which skip a random number of cycles of the stimulus between firings over a large range of input intensitie...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00198810
更新日期:1994-01-01 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
pub_type: 杂志文章
doi:10.1007/BF00355749
更新日期:1985-01-01 00:00:00
abstract::Vision typically has better spatial accuracy and precision than audition and as a result often captures auditory spatial perception when visual and auditory cues are presented together. One determinant of visual capture is the amount of spatial disparity between auditory and visual cues: when disparity is small, visua...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-016-0706-6
更新日期:2016-12-01 00:00:00
abstract::This study proposes an adaptive control architecture based on an accurate regression method called Locally Weighted Projection Regression (LWPR) and on a bio-inspired module, such as a cerebellar-like engine. This hybrid architecture takes full advantage of the machine learning module (LWPR kernel) to abstract an opti...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-012-0515-5
更新日期:2012-10-01 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
pub_type: 杂志文章
doi:10.1007/BF00239616
更新日期:1994-01-01 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 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
pub_type: 杂志文章
doi:10.1007/s00422-005-0576-9
更新日期:2005-09-01 00:00:00
abstract::The trace version of classical conditioning is used as a prototypical hippocampal-dependent task to study the recoding sequence prediction theory of hippocampal function. This theory conjectures that the hippocampus is a random recoder of sequences and that, once formed, the neuronal codes are suitable for prediction....
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-005-0568-9
更新日期:2005-06-01 00:00:00
abstract::Synchronization properties of locally coupled neural oscillators were investigated analytically and by computer simulation. When coupled in a manner that mimics excitatory chemical synapses, oscillators having more than one time scale (relaxation oscillators) are shown to approach synchrony using mechanisms very diffe...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00198772
更新日期:1993-01-01 00:00:00
abstract::A novel artificial neural network, derived from neurobiological observations, is described and examples of its performance are presented. This DYnamically STable Associative Learning (DYSTAL) network associatively learns both correlations and anticorrelations, and can be configured to classify or restore patterns with...
journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/BF00197642
更新日期:1990-01-01 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
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journal_title:Biological cybernetics
pub_type: 杂志文章
doi:10.1007/s00422-003-0452-4
更新日期:2004-02-01 00:00:00