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dc.contributor.authorSorkhabi, Majid Memarianen_NZ
dc.contributor.authorWendt, Karenen_NZ
dc.contributor.authorWilson, Marcus T.en_NZ
dc.contributor.authorDenison, Timothyen_NZ
dc.date.accessioned2021-02-10T03:51:58Z
dc.date.available2021-02-10T03:51:58Z
dc.date.issued2021en_NZ
dc.identifier.citationSorkhabi, M. M., Wendt, K., Wilson, M. T., & Denison, T. (2021). Numerical modelling of plasticity induced by Quadri-pulse stimulation. IEEE Access, 1–1. https://doi.org/10.1109/access.2021.3057829en
dc.identifier.urihttps://hdl.handle.net/10289/14111
dc.description.abstractQuadri-pulse stimulation (QPS), a type of repetitive transcranial magnetic stimulation (rTMS), can induce a considerable aftereffect on cortical synapses. Human experiments have shown that the type of effect on synaptic efficiency (in terms of potentiation or depression) depends on the time interval between pulses. The maturation of biophysically-based models, which describe the physiological properties of plasticity mathematically, offers a beneficial framework to explore induced plasticity for new stimulation protocols. To model the QPS paradigm, a phenomenological model based on the knowledge of spike timing-dependent plasticity (STDP) mechanisms of synaptic plasticity was utilized where the cortex builds upon the platform of neuronal population modeling. Induced cortical plasticity was modeled for both conventional monophasic pulses and unidirectional pulses generated by the cTMS device, in a total of 117 different scenarios. For the conventional monophasic stimuli, the results of the predictive model broadly follow what is typically seen in human experiments. Unidirectional pulses can produce a similar range of plasticity. Additionally, changing the pulse width had a considerable effect on the plasticity (approximately 20% increase). As the width of the positive phase increases, the size of the potentiation will also increase. The proposed model can generate predictions to guide future plasticity experiments. Estimating the plasticity and optimizing the rTMS protocols might effectively improve the safety implications of TMS experiments by reducing the number of delivered pulses to participants. Finding the optimal stimulation protocol with the maximum potentiation/depression can lead to the design of a new TMS pulse generator device with targeted hardware and control algorithms.
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en_NZ
dc.relation.urihttps://ieeexplore.ieee.org/document/9350275
dc.rightsThis work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/
dc.subjectTranscranial magnetic stimulation
dc.subjectTMS-induced plasticity
dc.subjectnear-rectangular magnetic stimuli
dc.subjectQPS
dc.subjectcTMS device
dc.titleNumerical modelling of plasticity induced by Quadri-pulse stimulationen_NZ
dc.typeJournal Article
dc.identifier.doi10.1109/access.2021.3057829en_NZ
dc.relation.isPartOfIEEE Accessen_NZ
pubs.begin-page1
pubs.elements-id259467
pubs.end-page1
pubs.publication-statusPublisheden_NZ
dc.identifier.eissn2169-3536en_NZ


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