Frequency-selectivity of a thalamocortical relay neuron during Parkinson's disease and deep brain stimulation: a computational study

Hayriye Cagnan, H. Cagnan, Hil Gaétan Ellart Meijer, Stephanus A. van Gils, M. Krupa, Tjitske Heida, Michelle Rudolph, Wyse J. Wadman, Hubert C.F. Martens

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    Abstract

    In this computational study, we investigated (i) the functional importance of correlated basal ganglia (BG) activity associated with Parkinson's disease (PD) motor symptoms by analysing the effects of globus pallidus internum (GPi) bursting frequency and synchrony on a thalamocortical (TC) relay neuron, which received GABAergic projections from this nucleus; (ii) the effects of subthalamic nucleus (STN) deep brain stimulation (DBS) on the response of the TC relay neuron to synchronized GPi oscillations; and (iii) the functional basis of the inverse relationship that has been reported between DBS frequency and stimulus amplitude, required to alleviate PD motor symptoms [A. L. Benabid et al. (1991)Lancet, 337, 403–406]. The TC relay neuron selectively responded to and relayed synchronized GPi inputs bursting at a frequency located in the range 2–25 Hz. Input selectivity of the TC relay neuron is dictated by low-threshold calcium current dynamics and passive membrane properties of the neuron. STN-DBS prevented the TC relay neuron from relaying synchronized GPi oscillations to cortex. Our model indicates that DBS alters BG output and input selectivity of the TC relay neuron, providing an explanation for the clinically observed inverse relationship between DBS frequency and stimulus amplitude.
    Original languageUndefined
    Article number10.1111/j.1460-9568.2009.06922.x
    Pages (from-to)1306-1317
    Number of pages12
    JournalEuropean journal of neuroscience
    Volume30
    Issue number7
    DOIs
    Publication statusPublished - 2009

    Keywords

    • EWI-16424
    • Basal ganglia
    • Modulation
    • IR-68313
    • Relay
    • METIS-266483
    • High-frequency stimulation

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