Non-invasive Amelioration of Essential Tremor via Phase-Locked Disruption of its Temporal Coherence
Sebastian R Schreglmann,
Robert L Peach,
Edward S. Boyden,
Kailash P Bhatia,
Posted 24 Jun 2020
bioRxiv DOI: 10.1101/2020.06.23.165498
Posted 24 Jun 2020
Aberrant neural oscillations hallmark numerous brain disorders. Here, we first report a method to track the phase of neural oscillations in real-time via endpoint-corrected Hilbert transform (ecHT) that mitigates the characteristic Gibbs distortion. We then used ecHT to show that the aberrant neural oscillation that hallmarks essential tremor (ET) syndrome, the most common adult movement disorder, can be noninvasively suppressed via electrical stimulation of the cerebellum phase-locked to the tremor. The tremor suppression is sustained after the end of the stimulation and can be phenomenologically predicted. Finally, using feature-based statistical-learning and neurophysiological-modelling we show that the suppression of ET is mechanistically attributed to a disruption of the temporal coherence of the oscillation via perturbation of the tremor generating a cascade of synchronous activity in the olivocerebellar loop. The suppression of aberrant neural oscillation via phase-locked driven disruption of temporal coherence may represent a powerful neuromodulatory strategy to treat brain disorders. ### Competing Interest Statement The authors have declared no competing interest.
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