Structural Connectivity of the Basal Ganglia from Patient-Individual Tractography Is Key for Understanding the Effects of Deep Brain Stimulation in Parkinson's Disease

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11110%2F25%3A10501154" target="_blank" >RIV/00216208:11110/25:10501154 - isvavai.cz</a>

Result on the web

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=yZPylIC.4q" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=yZPylIC.4q</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1159/000546716" target="_blank" >10.1159/000546716</a>

Result language

angličtina

Original language name

Structural Connectivity of the Basal Ganglia from Patient-Individual Tractography Is Key for Understanding the Effects of Deep Brain Stimulation in Parkinson's Disease

Original language description

Introduction: In Parkinson&apos;s disease (PD) patients, modulation of the fibre tracts of the cortico-basal ganglia-thalamo-cortical loop is the presumed mechanism of action of deep brain stimulation (DBS) of the subthalamic nucleus (STN). Therefore, we explored patient-individual cortical structural connectivity of the volume of tissue activated (VTA), as well as DBS-induced modulation of fibre tracts connecting the STN with cortical and subcortical nodes, and their correlation with therapeutic effects. Methods: A retrospective cohort of n = 69 PD patients treated with bilateral DBS of the STN was analysed. Clinical response was assessed from the DBS-induced change in the UPDRS-III motor scores (total and symptom-specific sub-scores) under regular medication after a median follow-up of 9.0 (range 2.6-20.2) months. Tractography based on patient-individual diffusion-weighted MRI was employed in two ways. Whole-brain tractography was used to identify the cortical connections of fibres passing the VTAs, and reconstruction of specific white matter pathways of the motor loop connecting the STN with the basal ganglia and cortex was used to identify the proportion of fibres within these pathways which was modulated by STN-DBS. This proportion of pathway modulation was used in a correlative analysis with clinical outcomes. Results: Fibres traversing the VTAs were primarily connected to the supplementary motor area (SMA) and to a lesser degree to the premotor cortex. Within the pathways connecting the STN with the cortical and subcortical nodes, on average 30-40% (range 10-80%) of the fibres were modulated by STN-DBS. This proportion correlated significantly with the percentage change in UPDRS motor score for fibres connecting the STN with the SMA (rho = 0.28), pre-SMA (rho = 0.26), ventral and dorsal premotor cortices (rho = 0.26 and rho = 0.29, respectively), and the globus pallidus externus (rho = 0.26) and internus (rho = 0.29). Also, good clinical responses for both tremor and rigidity were associated with a significantly (p &lt; 0.05) higher proportion of modulated fibres for the same cortico- and sub-cortico-STN connections. Conclusion: Patient-individual tractography reveals that, in PD, most of the cortical fibres traversing the VTA are connected to the SMA. In addition, clinical efficacy is related to the proportion of DBS-affected fibres connecting the STN with nodes of both the hyperdirect (cortex-STN) and the indirect pathways (STN-basal ganglia). As such, patient-specific tractography, in particular in the basal ganglia, could be used in a clinical context as a tool to guide therapy. (c) 2025 The Author(s). Published by S. Karger AG, Basel [GRAPHICS]

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

30103 - Neurosciences (including psychophysiology)

Project

—

Continuities

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Stereotactic and Functional Neurosurgery

ISSN

1011-6125

e-ISSN

1423-0372

Volume of the periodical

103

Issue of the periodical within the volume

4

Country of publishing house

CH - SWITZERLAND

Number of pages

16

Pages from-to

279-294

UT code for WoS article

001554843800001

EID of the result in the Scopus database

2-s2.0-105014768364