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Pathophysiology of Neuronal Oscillations Within Subthalamo-cortical Loops in Parkinson's Disease
Sponsor: Assistance Publique Hopitaux De Marseille
Summary
Neuronal activity in circuits between the basal ganglia (BG) and motor cortical areas is abnormally synchronised and rhythmic. The oscillatory activity prevails at 8-30 Hz in untreated Parkinson's Disease (PD) and its amplitude at both subthalamic and cortical levels inversely correlates with motor impairment. Moreover, these different levels in BG-cortical loops are coherent in this frequency band. The 8-30 Hz activity is suppressed by treatment following treatment with dopaminergic drugs and is partially suppressed prior to and during voluntary movements. An unanswered question is how do BG-cortical loops become so prominently engaged in this oscillatory activity? One possible explanation is that the resonance frequencies of the loops fall in the 8-30 Hz band in the untreated state, so that oscillations in this band are transmitted particularly well. This hypothesis was confirmed in a previous series of experiments.The aim is to determine whether the resonance frequency within BG-cortical loops is correlated to the BG-cortical coherence frequency (with 20 subjets during 24 months).
Key Details
Gender
All
Age Range
Any - Any
Study Type
INTERVENTIONAL
Enrollment
23
Start Date
2012-03-26
Completion Date
2015-05-27
Last Updated
2026-05-07
Healthy Volunteers
No
Conditions
Interventions
subthalamo-cortical loops stimulation in a one-sided and bipolar way
Record STN-cortex LFP coherence pattern and then stimulate STN (at 0, 5, 10, 15, 20, 25, 30 Hz) in newly implanted patients
subthalamo-cortical loops stimulation in a one-sided and bipolar way
Record STN-cortex LFP coherence pattern and then stimulate STN (at 0, 5, 10, 15, 20, 25, 30 Hz) in newly implanted patients
Locations (1)
APHM
Marseille, France