Transcranial Electrical Stimulation (TCES) / Cerebral Blood Flow (CBF) / Xenon Under Computerized Tomography (Xe/CT)
Summary
Direct stimulation of the cerebral cortex induces an increase in cerebral blood flow. Although this information is known, it has never been documented during Transcranial Cerebral Electrical Stimulation (TCES), which is a non invasive technique. It is used to modulate the opiate endogenous system, mainly in opioid users but no cerebral blood flow mapping of the anatomic regions involved in this modulation of the opiate system under electrical stimulation has been performed in functional Computerized Tomography.
Description
- Principal Objective : To compare the increase in mean cerebral blood flow in a group of defined zones (the thalamus, anterior cingulate gyrus, the insula, periacqueductal region of the brain stem,the frontal lobes, the striatum and limbic system) in healthy volunteers stimulated or not stimulated by TCES.
- Secondary Objective : Description of cerebral blood flow variations in the different zones in order to map electrostimulated areas.
- Study design : An experimental, randomized, double-blind, single-centre trial with 2 groups, a study group (stimulated by TCES) and a control group (not stimulated).
- Inclusion criteria : Participants free of any known neurological or psychiatric disorder; participants not under treatment particularly with opioids, analgesics or medication containing codeine or morphine for at least a month; participants aged between 18 and 65 having signed a written informed consent ; participants having accepted to be registered on the national eligibility list for subjects participating in a trial without direct individual benefit, and covered by an insurance policy.
- Exclusion criteria : Participation in two different study trials without direct individual benefit at the same time. Contraindications to Computerized Tomography. Subjects diagnosed clinically with a Neurological or Psychiatric disorder; Subjects who have been under analgesics or morphine agonists for less than a month; Pregnant or breastfeeding mothers and women without an adequate contraception. Drug addicts or persons under tutelage.
- Study plan: Study group: Xe/CT and transcranial electrostimulation / Control group : Xe/CT
- Principal Criterion of Judgement: difference in mean cerebral blood flow between the study group(stimulated) and the control group (not stimulated).
- Secondary Criteria of Judgement : Difference in mean cerebral blood flow region per region (thalamus, anterior cingulate gyrus, insula, periacqueductal region of the brain stem, the frontal lobes, the striatum and limbic system).
- Number of subjects : 40
- Duration of subject participation in study : 2 H 30
Study Design
Allocation: Randomized, Control: Placebo Control, Endpoint Classification: Pharmacodynamics Study, Intervention Model: Parallel Assignment, Masking: Double-Blind, Primary Purpose: Treatment
Conditions
Healthy Volunteers
Intervention
TCES
Location
Service de Neuro-radiologie, hôpital Pellegrin
Bordeaux
France
33076
Status
Completed
Source
University Hospital, Bordeaux
Results (where available)
Links
- Source: http://clinicaltrials.gov/show/NCT00273663
- Information obtained from ClinicalTrials.gov on July 15, 2010
Medical and Biotech [MESH] Definitions
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Individuals who donate their services to the hospital.
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A special service provided by volunteers to accompany patients who need help in moving about the health facility.
Red Cross
International collective of humanitarian organizations led by volunteers and guided by its Congressional Charter and the Fundamental Principles of the International Red Cross Movement, to provide relief to victims of disaster and help people prevent, prepare for, and respond to emergencies.
Clinical Trial, Phase Ii
Work that is a report of a pre-planned, usually controlled, clinical study of the safety and efficacy of diagnostic, therapeutic, or prophylactic drugs, devices, or techniques based on several hundred volunteers, including a limited number of patients, and conducted over a period of about two years in either the United States or a foreign country.
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Studies that are usually controlled to assess the effectiveness and dosage (if appropriate) of diagnostic, therapeutic, or prophylactic drugs, devices, or techniques. These studies are performed on several hundred volunteers, including a limited number of patients with the target disease or disorder, and last about two years. This concept includes phase II studies conducted in both the U.S. and in other countries.
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