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 spatial component and study the temporal order inherent in discrete movement in terms of stable, reproducible space-time relationships. The coordination of discrete movement is captured in terms of relative timing. Using an exactly solvable nonlinear oscillator as a mathematical model, we show how the timing properties of discrete movement can be described by these pattern dynamics and discuss the relation of the pattern variables to observable end-effector movement. By coupling several such component dynamics in a fashion analogous to models of rhythmic movement coordination we capture the coordination of discrete movements of two components. We find the tendency to synchronize the component movements as the discrete analogon of in-phase locking and study its breakdown when the components become too different in their dynamic properties. The concept of temporal stability leads to the prediction that remote compensatory responses occur such as the restore synchronization when one component is perturbed. This prediction can be used to test the theory. We find that the discrete analogon to antiphase locking in rhythmic movement is a tendency to move sequentially, a finding that can also be subjected to empirical test.
journal_name
Biol Cybernjournal_title
Biological cyberneticsauthors
Schöner Gdoi
10.1007/BF00203449subject
Has Abstractpub_date
1990-01-01 00:00:00pages
257-70issue
4eissn
0340-1200issn
1432-0770journal_volume
63pub_type
杂志文章abstract：:Some interesting properties on pattern separation have been shown through researches by neural models of cerebellar cortex. It seems to us that those results are a part of the properties of pattern separation. A two layer random nerve net with inhibitory connections is given as a model of the cerebellar cortex. The mo...
journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/BF00336858
更新日期：1979-09-01 00:00:00
abstract：:Depolarization of an excitable membrane has a dual effect; excitatory in that it causes rapid opening of calcium and/or sodium channels but inhibitory in that it also causes those channels to inactivate. We considered whether apparently paradoxical or dual behavior might be exhibited by excitatory and inhibitory synap...
journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/BF00197289
更新日期：1991-01-01 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
pub_type： 杂志文章
doi：10.1007/s004220050521
更新日期：1999-04-01 00:00:00
abstract：:Connections among ventrolateral medullary respiratory neurons inferred from spike train analysis were incorporated into a model and simulated with the program SYSTM11 (MacGregor 1987). Inspiratory (I) and expiratory (E) neurons with augmenting (AUG) and decrementing (DEC) discharge patterns and rostral I-E/I neurons e...
journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/BF00200329
更新日期：1994-01-01 00:00:00
abstract：:According to modern views of the cerebellum in motor control, each cerebellar functional unit, or microzone, learns how to execute predictive and coordinative control, based on long-term depression of the granule cell-Purkinje cell synapses. In the present paper, in light of recent experimental and theoretical studies...
journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/s004220050462
更新日期：1998-08-01 00:00:00
abstract：:An initial test for a theory of lateral hypothalamic regulation of electrocortical activity is undertaken. The theory supposes lateral hypothalamic input directly or indirectly damps telencephalic resonances involving linear wave phenomena, enabling this pathway to act as parametric control of information processing i...
journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/BF00337154
更新日期：1984-01-01 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：:The superior colliculus (SC) integrates relevant sensory information (visual, auditory, somatosensory) from several cortical and subcortical structures, to program orientation responses to external events. However, this capacity is not present at birth, and it is acquired only through interactions with cross-modal eve...
journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/s00422-012-0511-9
更新日期：2012-12-01 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：: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：: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：:One possible strategy for the solution of the correspondence problem of stereo matching is the coarse-to-fine mechanism: The matching process starts with a lowpass-filtered version of the stereogram where only a few, high-contrast image features can be extracted and the probability of false matches is therefore low. I...
journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/BF00204198
更新日期：1996-02-01 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：: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
pub_type： 杂志文章
doi：10.1007/s00422-005-0584-9
更新日期：2005-07-01 00:00:00
abstract：:Histograms of fast-phase intervals in human optokinetic and vestibular nystagmus were generated, and fitted to statistical distributions used in previous studies. The distributions did not depend on stimulation type (optokinetic or vestibular). An inverse Gaussian or a gamma distribution fitted the data better than di...
journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/s00422-002-0324-3
更新日期：2002-07-01 00:00:00
abstract：:Highly-interconnected networks of nonlinear analog neurons are shown to be extremely effective in computing. The networks can rapidly provide a collectively-computed solution (a digital output) to a problem on the basis of analog input information. The problems to be solved must be formulated in terms of desired optim...
journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/BF00339943
更新日期：1985-01-01 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：: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
pub_type： 杂志文章
doi：10.1007/BF00198768
更新日期：1989-01-01 00:00:00
abstract：:It has been suggested that the mammalian memory system has both familiarity and recollection components. Recently, a high-capacity network to store familiarity has been proposed. Here we derive analytically the optimal learning rule for such a familiarity memory using a signal- to-noise ratio analysis. We find that in...
journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/s00422-008-0275-4
更新日期：2009-01-01 00:00:00
abstract：:Walking behavior is modulated by controlling joint torques in most existing passivity-based bipeds. Controlled Passive Walking with adaptable stiffness exhibits controllable natural motions and energy efficient gaits. In this paper, we propose torque-stiffness-controlled dynamic bipedal walking, which extends the conc...
journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/s00422-014-0625-3
更新日期：2014-12-01 00:00:00
abstract：:In the neural superposition eye of a dipteran fly every ommatidium has eight photoreceptors, each associated with a rhabdomere, two central and six peripheral, which altogether result in seven functional light guides. Groups of eight rhabdomeres in neighboring ommatidia have largely overlapping fields of view. Based o...
journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/s00422-006-0097-1
更新日期：2006-11-01 00:00:00
abstract：:A mathematical model for describing dynamic phenomena in the olfactory bulb is presented. The nature of attractors and the bifurcation sequences in terms of the lateral connection strength in the mitral layer are studied numerically. Chaotic activity has only been found in the case of strong excitatory coupling. Synap...
journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/BF00201408
更新日期：1993-01-01 00:00:00
abstract：:The concerted and self-organizing behavior of spinal cord segments in generating locomotor patterns is modulated by afferent sensory information and controlled by descending pathways from the brainstem, cerebellum, or cortex. The purpose of this study was to define a minimal set of parameters that could control a simi...
journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/s00422-002-0335-0
更新日期：2003-01-01 00:00:00
abstract：:Identification and analysis of directed influences in multivariate systems is an important problem in many scientific areas. Recent studies in neuroscience have provided measures to determine the network structure of the process and to quantify the total effect in terms of energy transfer. These measures are based on ...
journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/s00422-010-0386-6
更新日期：2010-08-01 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
pub_type： 杂志文章
doi：10.1007/BF00341924
更新日期：1986-01-01 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：:The evolutionary transition from water to land required new locomotor modes and corresponding adjustments of the spinal "central pattern generators" for locomotion. Salamanders resemble the first terrestrial tetrapods and represent a key animal for the study of these changes. Based on recent physiological data from sa...
journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/s00422-012-0538-y
更新日期：2013-10-01 00:00:00
abstract：:Learning to make reaching movements in force fields was used as a paradigm to explore the system architecture of the biological adaptive controller. We compared the performance of a number of candidate control systems that acted on a model of the neuromuscular system of the human arm and asked how well the dynamics of...
journal_title：Biological cybernetics
pub_type： 杂志文章
doi：10.1007/s004220050543
更新日期：1999-07-01 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：: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
