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    Synchronized Beta-Band Oscillations in a Model of the Globus Pallidus - Subthalamic Nucleus Network under External Input

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    Author
    Ahn, Sungwoo; Zauber, S. Elizabeth; Worth, Robert M.; Rubchinsky, Leonid L.
    Abstract
    Hypokinetic symptoms of Parkinson’s disease are usually associated with the excessively strong oscillations and synchrony in the beta frequency band. The origin of this synchronized oscillatory dynamics is being debated. Cortical circuits may be a critical source of excessive beta in Parkinson’s disease. However, subthalamo-pallidal circuits were also suggested to be a substantial component in generation and/or maintenance of Parkinsonian beta activity. Here we study how the subthalamo-pallidal circuits interact with input signals in the beta frequency band, representing cortical input. We use conductance-based models of the subthalamo-pallidal network and two types of input signals: artificially-generated inputs and input signals obtained from recordings in Parkinsonian patients. The resulting model network dynamics is compared with the dynamics of the experimental recordings from patient’s basal ganglia. Our results indicate that the subthalamo-pallidal model network exhibits multiple resonances in response to inputs in the beta band. For a relatively broad range of network parameters, there is always a certain input strength, which will induce patterns of synchrony similar to the experimentally observed ones. This ability of the subthalamo-pallidal network to exhibit realistic patterns of synchronous oscillatory activity under broad conditions may indicate that these basal ganglia circuits are directly involved in the expression of Parkinsonian synchronized beta oscillations. Thus, Parkinsonian synchronized beta oscillations may be promoted by the simultaneous action of both cortical (or some other) and subthalamo-pallidal network mechanisms; these mechanisms should not necessarily be mutually exclusive.
    URI
    http://hdl.handle.net/10342/7870
    Subject
    basal ganglia, Parkinson’s disease, synchronization, oscillations, globus pallidus, subthalamic nucleus
    Date
    2016
    Citation:
    APA:
    Ahn, Sungwoo, & Zauber, S. Elizabeth, & Worth, Robert M., & Rubchinsky, Leonid L.. (January 2016). Synchronized Beta-Band Oscillations in a Model of the Globus Pallidus - Subthalamic Nucleus Network under External Input. Frontiers in Computational Neuroscience, (10:1), p.. Retrieved from http://hdl.handle.net/10342/7870

    Display/Hide MLA, Chicago and APA citation formats.

    MLA:
    Ahn, Sungwoo, and Zauber, S. Elizabeth, and Worth, Robert M., and Rubchinsky, Leonid L.. "Synchronized Beta-Band Oscillations in a Model of the Globus Pallidus - Subthalamic Nucleus Network under External Input". Frontiers in Computational Neuroscience. 10:1. (.), January 2016. March 06, 2021. http://hdl.handle.net/10342/7870.
    Chicago:
    Ahn, Sungwoo and Zauber, S. Elizabeth and Worth, Robert M. and Rubchinsky, Leonid L., "Synchronized Beta-Band Oscillations in a Model of the Globus Pallidus - Subthalamic Nucleus Network under External Input," Frontiers in Computational Neuroscience 10, no. 1 (January 2016), http://hdl.handle.net/10342/7870 (accessed March 06, 2021).
    AMA:
    Ahn, Sungwoo, Zauber, S. Elizabeth, Worth, Robert M., Rubchinsky, Leonid L.. Synchronized Beta-Band Oscillations in a Model of the Globus Pallidus - Subthalamic Nucleus Network under External Input. Frontiers in Computational Neuroscience. January 2016; 10(1) . http://hdl.handle.net/10342/7870. Accessed March 06, 2021.
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