RT journal article
T1 Subthalamic Beta Activity in Parkinson's Disease May Be Linked to Dorsal Striatum Gray Matter Volume and Prefrontal Cortical Thickness: A Pilot Study
A1 Sanmartino, Florencia Soledad
A1 Cruz Gómez, Álvaro Javier
A1 Rashid Abdu Rahim López, Raúl
A1 Lozano Soto, Elena María
A1 López Sosa, Fernando
A1 Zuazo Ojeda, Mirem Amaya
A1 Riqué-Dormido, Jesús
A1 Espinosa Rosso, Raúl
A1 González Rosa, Javier Jesús
A2 Psicología
K1 Parkinson’s disease
K1 subthalamic nucleus
K1 beta oscillations
K1 local field potentials
K1 cortical thickness
K1 gray matter volume
AB BackgroundExcessive oscillations at beta frequencies (13-35 Hz) in the subthalamic nucleus (STN) represent a pathophysiological hallmark of Parkinson's disease (PD), which correlates well with parkinsonian symptoms and is reduced in response to standard disease treatments. However, the association of disease-specific regional gray matter (GM) atrophy or cortical thickness (CT) with the presence of STN beta oscillatory activity has been poorly investigated but is of relevance given the potential of these variables for extracting information about PD pathophysiology. This exploratory study investigated the involvement of regional GM volume and CT in the basal ganglia-cortical network and its potential association with the presence of STN beta oscillatory activity in PD. MethodsWe acquired preoperative GM densities on T1-weighted magnetic resonance imaging scans and we carried out regional estimation of GM volume and CT. LFP activities from the STN were recorded post-operatively in 7 cognitively preserved PD patients off dopaminergic medication undergoing deep-brain stimulation surgery. Oscillatory beta power was determined by power spectral density of 4-min resting state STN LFP activity. Spearman partial correlations and regression analysis were used to screen the presence of STN beta power for their relationship with GM volume and CT measurements. ResultsAfter controlling for the effects of age, educational level, and disease duration, and after correcting for multiple testing, enhanced STN beta power showed significant and negative correlations between, first, volume of the right putamen and left caudate nucleus, and second, smaller CT in frontal regions involving the left rostral middle frontal gyrus (MFG) and left medial orbitofrontal gyrus. A lower volume in the right putamen and a lower CT in the left MFG demonstrated the strongest associations with increased STN beta power. ConclusionsThese tentative results seem to suggest that STN LFP beta frequencies may be mainly linked to different but ongoing parallel neurodegenerative processes, on the one hand, to GM volume reduction in dorsal striatum, and on the other hand, to CT reduction of prefrontal-"associative" regions. These findings could further delineate the brain structural interactions underpinning the exaggerated STN beta activity commonly observed in PD patients.
PB FRONTIERS MEDIA SA
SN 1664-2295
YR 2022
FD 2022-03
LK http://hdl.handle.net/10498/27482
UL http://hdl.handle.net/10498/27482
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 21-sep-2026