Tonic and phasic changes in anteromedial globus pallidus activity in Tourette syndrome. Issue 7 (29th May 2017)

• Record Type: Journal Article
• Authors: Israelashvili, Michal; Smeets, Anouk Y.J.M.; Bronfeld, Maya; Zeef, Dagmar H.; Leentjens, Albert F.G.; van Kranen‐Mastenbroek, Vivianne; Janssen, Marcus L.F.; Temel, Yasin; Ackermans, Linda; Bar‐Gad, Izhar
• Is Part Of: Movement disorders. Volume 32:Issue 7(2017)
• Page Start: 1091
• Page End: 1096
• Publication Date: 2017-05-29
• Subjects: Tourette syndrome -- deep brain stimulation (DBS) -- globus pallidus -- neurophysiology -- hyperkinetic disorders; Movement disorders -- Periodicals; 610
• DOI: 10.1002/mds.27043
• Languages: English
• ISSNs: 0885-3185

Abstract

ABSTRACT: Background : Tourette syndrome is a hyperkinetic neurodevelopmental disorder characterized by tics. Objective : Assess the neuronal changes in the associative/limbic GP associated with Tourette syndrome. Methods : Neurophysiological recordings were performed from the anterior (associative/limbic) GPe and GPi of 8 awake patients during DBS electrode implantation surgeries. Results : The baseline firing rate of the neurons was low in a state‐dependent manner in both segments of the GP. Tic‐dependent transient rate changes were found in the activity of individual neurons of both segments around the time of the tic. Neither oscillatory activity of individual neurons nor correlations in their interactions were observed. Conclusions : The results demonstrate the involvement of the associative/limbic pathway in the underlying pathophysiology of Tourette syndrome and point to tonic and phasic modulations of basal ganglia output as a key mechanisms underlying the abnormal state of the disorder and the expression of individual tics, respectively. © 2017 International Parkinson and Movement Disorder Society