Deep brain stimulation (DBS) is a therapeutic approach aimed at applying high-frequency, low-intensity electrical stimulation using electrodes implanted in subcortical structures and connected subcutaneously to a stimulator implanted in the abdomen. In recent years, new indications have been studied for severe and drug-resistant forms of several neurological and neuropsychiatric pathologies. Its non-lesional, reversible and customizable nature make it a therapy of choice.
However, several factors are currently slowing down the evolution and optimization of SCP.
The identification of objective, quantifiable and predictive criteria for the therapeutic effects of stimulation would allow an acceleration of the individualized identification of the therapeutic parameters of SCP. The surgical procedure for implanting the stimulation equipment is carried out in several stages, which offer unique opportunities to acquire individual imaging or electrophysiology data that are potentially predictive of the therapeutic effect of DBS. In order to continue the optimization of DBS procedures, and therefore to maximize its therapeutic effects, it seems crucial to us to take advantage of all the neurophysiological data likely to be collected during this procedure. Furthermore, given the multiplication of indications for SCP, it seems necessary to highlight specific markers. Thus, the use of neurocognitive and/or motor tests specific to each pathology and coupled with electrophysiological recordings and anatomical and functional examinations would make it possible to highlight specific functional biomarkers predictive of therapeutic effects.
Adult patient
Patient suffering from a pathology requiring treatment with deep brain stimulation: neurological disease (e.g.: Parkinson Disease, Essential Tremors, dystonia, epilepsy, etc.) or psychiatric disease (e.g.: Obsessive Compulsive Disorder, depression, eating disorders, etc.).
Patient capable of understanding the study procedures and completing the self-questionnaires in French
Patient informed and having signed the informed consent form
Contraindications to DBS, neurosurgery or anesthesia
Patients with significant hemorrhagic or infectious risks
Patient unable to perform the neurocognitive or sensorimotor tests
Patient who is not a beneficiary of a social security system.
Single group
Electrophysiological recordings
Procedure/SurgeryAddition of electrophysiological recordings performed during cognitive tasks passation in patients undergoing DBS: in pre-op, per-op, peri-op and post-op setting
Brain activity recorded by electrophysiological measurements
Electrophysiological variables recorded during neurocognitive and/or sensorimotor tests before and after the DBS procedure (at least 2 months at effective parameters)
Therapeutic effectiveness of DBS
The effectiveness of DBS is calculated as the differential (in %) of the symptom severity score(s) before and after the DBS procedure, measured using scales specific to each pathology (e.g. MADRS for depression (min score: 0 - max score: 60), YBOCS for OCD (min score: 0- max score: 40). Higher score means worse outcome for both scales.
Number of patients with pre operative MRI by intensity
Number of patients with 3 and 7 teslas MRI used before DBS surgery
Therapeutic effectiveness of DBS
The effectiveness of DBS is calculated as the differential (in %) of the symptom severity score(s) before and after the DBS procedure, measured using scales specific to each pathology.
Number of participants with correct DBS electrodes implantation
The precision of the implantation of the DBS electrodes evaluated by the therapeutic effect obtained in the pathology treated.
Number of participants with inter-individual reproducibility of electrophysiological responses
The inter-individual reproducibility of electrophysiological responses with a view to the generalization of this type of approach
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