Single-unit activity of the anterior Globus pallidus internus in Tourette patients and posterior Globus pallidus internus in dystonic patients

Publication date: December 2017
Source:Clinical Neurophysiology, Volume 128, Issue 12
Author(s): Andrea Giorni, François Windels, Peter G. Stratton, Raymond Cook, Paul Silberstein, Terrence Coyne, Peter A. Silburn, Pankaj Sah
ObjectivesOur goal was to provide a detailed analysis of neurons' electrophysiological activity recorded in sub-territories of Globus pallidus internus (GPi) used as Deep Brain Stimulation (DBS) targets for these clinical conditions to potentially assist electrode targeting.MethodsWe used intra-operative microelectrode recording during stereotactic neurosurgery to guide implantation of DBS lead.ResultsUnits in the medial anterior part of GPi of 7 Tourette's syndrome patients under general anesthesia were firing at mean and median rate of 32.1 and 21 Hz respectively (n = 101), with 45% of spikes fired during bursts and 21.3 bursts per minute. In the latero-posterior part of GPi of 7 dystonic patients under local anesthesia the mean and median activity were 46.1 and 30.6 Hz respectively (n = 27), and a mean of 21.7 bursts per minute was observed, with 30% of all spikes occurring during these bursts.ConclusionUnits activity pattern – slow-regular, fast-irregular or fast-regular were present in different proportions between the two targets.SignificanceThe electrophysiological characteristics of the medial-anterior part of GPi and its latero-posterior portion can be used to assist DBS electrode targeting and also support the refinement of pathophysiological models of Tourette's syndrome and Dystonia.



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