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  • 1
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    Dynamic pattern generation in behavioral and neural systems (1988)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1988-03-25
    Description: In the search for principles of pattern generation in complex biological systems, an operational approach is presented that embraces both theory and experiment. The central mathematical concepts of self-organization in nonequilibrium systems (including order parameter dynamics, stability, fluctuations, and time scales) are used to show how a large number of empirically observed features of temporal patterns can be mapped onto simple low-dimensional (stochastic, nonlinear) dynamical laws that are derivable from lower levels of description. The theoretical framework provides a language and a strategy, accompanied by new observables, that may afford an understanding of dynamic patterns at several scales of analysis (including behavioral patterns, neural networks, and individual neurons) and the linkage among them.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Schoner, G -- Kelso, J A -- MH42900-01/MH/NIMH NIH HHS/ -- New York, N.Y. -- Science. 1988 Mar 25;239(4847):1513-20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Complex Systems, Florida Atlantic University, Boca Raton 33431.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/3281253" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Behavior/*physiology ; Electrophysiology ; Humans ; Models, Biological ; Motor Activity/physiology ; *Nervous System Physiological Phenomena ; Neurons/physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    On the nature of human interlimb coordination (1979)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1979-03-09
    Description: Movement time varies as a function of amplitude and requirements for precision, according to Fitts' law, but when subjects perform two-handed movements to targets of widely disparate difficulty they do so simultaneously. The hand moving to an "easy" target moves more slowly to accommodate its "difficult" counterpart, yet both hands reach peak velocity and acceleration synchronously. This result suggests that the brain produces simultaneity of action not by controlling each limb independently, but by organizing functional groupings of muscles that are constrained to act as a single unit.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kelso, J A -- Southard, D L -- Goodman, D -- New York, N.Y. -- Science. 1979 Mar 9;203(4384):1029-31.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/424729" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Brain/physiology ; Functional Laterality ; Hand/physiology ; Humans ; Motor Skills/*physiology ; *Movement
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
    Electronic Resource
    Electronic Resource
    Characterizing the dynamics of auditory perception (1995)
    Woodbury, NY : American Institute of Physics (AIP)
    Chaos 5 (1995), S. 70-75 
    Details
    ISSN: 1089-7682
    Source: AIP Digital Archive
    Topics: Physics
    Notes: After listening to a sound that is presented repeatedly, subjects report hearing different transforms of the original sound. The frequency of reported transforms is a sensitive index of some speech disorders as well as cognitive flexibility in aging. In this paper, we propose and investigate quantitative measures that characterize the dynamics of this phenomenon, known as the verbal transformation effect. In particular, we show that the distribution of the dwell time, the time spent perceiving a string of a given phonemic form before switching to another form, obeys a power law for normal subjects with an exponent valued between 1 and 2. This result suggests that within this paradigm there is no characteristic time scale for the perceptual process. Additionally, we analyze the correlation properties of the transforms. We suggest that the complexity measures and techniques introduced here might be useful diagnostic tools for a number of speech and cognitive disorders. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.166088
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  • 4
    Electronic Resource
    Electronic Resource
    Self-organizing dynamics of the human brain: Critical instabilities and Šil'nikov chaos (1995)
    Woodbury, NY : American Institute of Physics (AIP)
    Chaos 5 (1995), S. 64-69 
    Details
    ISSN: 1089-7682
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Using a sensorimotor coordination task in conjunction with an array of SQUIDs (Superconducting QUantum Interference Devices) we demonstrate critical instabilities in human brain activity patterns. Analysis of the dominant spatial pattern of the brain and its time-varying amplitude displays a task-dependent geometry characteristic of Šil'nikov-like chaos, which changes qualitatively at the transition. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.166087
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  • 5
    Electronic Resource
    Electronic Resource
    Dynamic cortical activity in the human brain reveals motor equivalence (1998)
    [s.l.] : Macmillan Magazines Ltd.
    Nature 392 (1998), S. 814-818 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] That animals and humans can accomplish the same goal using different effectors and different goals using the same effectors attests to the remarkable flexibility of the central nervous system. This phenomenon has been termed ‘motor equivalence’,, an example being the writing of a ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/33922
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  • 6
    Electronic Resource
    Electronic Resource
    Nonequilibrium Phase Transitions in Coordinated Movements Involving Many Degrees of Freedom (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 504 (1987), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1987.tb48745.x
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  • 7
    Electronic Resource
    Electronic Resource
    Book reviews (1991)
    Springer
    Bulletin of mathematical biology 53 (1991), S. 657-663 
    Details
    ISSN: 1522-9602
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02458634
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  • 8
    Electronic Resource
    Electronic Resource
    Book reviews (1992)
    Springer
    Bulletin of mathematical biology 54 (1992), S. 895-901 
    Details
    ISSN: 1522-9602
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02459935
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  • 9
    Electronic Resource
    Electronic Resource
    Pattern switching in human multilimb coordination dynamics (1993)
    Springer
    Bulletin of mathematical biology 55 (1993), S. 829-845 
    Details
    ISSN: 1522-9602
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Abstract A relative phase model of four coupled oscillators is used to interpret experiments on the coordination between rhythmically moving human limbs. The pairwise coupling functions in the model are motivated by experiments on two-limb coordination. Stable patterns of coordination between the limbs are represented by fixed points in relative phase coordinates. Four invariant circles exist in the model, each containing two patterns of coordination seen experimentally. The direction of switches between two four-limb patterns on the same circle can be understood in terms of two-limb coordination. Transitions between patterns in the human four-limb system are theoretically interpreted as bifurcations in a nonlinear dynamical system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02460675
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  • 10
    Electronic Resource
    Electronic Resource
    A stochastic theory of phase transitions in human hand movement (1986)
    Springer
    Biological cybernetics 53 (1986), S. 247-257 
    Details
    ISSN: 1432-0770
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Computer Science , Physics
    Notes: Abstract The order parameter equation for the relative phase of correlated hand movements, derived in a previous paper by Haken et al. (1985), is extended to a time-dependent stochastic differential equation. Its solutions are determined close to stationary points and for the transition region. Remarkably good agreement between this theory and recent experiments done by Kelso and Scholz (1985) is found, and new predictions are offered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00336995
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