Track topics on Twitter Track topics that are important to you
The overall goal of this proposal is to evaluate the efficacy of transcranial direct current stimulation (tDCS), a noninvasive neuromodulation technique, to facilitate weight loss and weight loss maintenance in obesity. This is a novel clinical research study that examines the therapeutic potential of an innovative biomedical treatment for weight loss maintenance.
The hypothesis is that tDCS will successfully engage prefrontal-related neurobehavioral cognitive control systems, resulting in decreased eating disinhibition and therefore facilitation of weight loss and weight loss maintenance. To test this hypothesis, a 6-month randomized, sham-controlled, double-blind, intervention study was designed. Subjects will undergo an intervention with the following components/phases:
1. Phase 1 - Target engagement (one session) The purpose of this phase is to examine whether tDCS can reach the brain target, the dorsolateral prefrontal cortex, and influence performance in a neuropsychology tests that depends on the activity of this region. Results from this component of the study will provide evidence for target engagement. Genomic DNA will be extracted from whole blood for sequencing of Catechol-O-methyltransferase (COMT) and brain-derived neurotrophic factor (BDNF) polymorphism genotypes.
2. Phase 2 - tDCS alone (two weeks) During this phase participants will receive daily tDCS sessions over the course of two weeks (Monday to Friday; total=10 sessions). The purpose of this phase is to examine the effect of modulating the activity of the prefrontal cortex with tDCS on body weight under baseline/weight stable conditions. Also analyse changes in appetite and eating behavior.
3. Phase 3 - tDCS plus hypocaloric diet (two weeks). During this phase participants will undergo a hypocaloric diet intervention aimed at achieving a 5% body weight reduction at 3 months. The diet will be individualized on the basis of physical activity levels, age for each participant. This intervention will be be conducted at an inpatient, well-controlled setting to guarantee adherence to the diet. Here the diet intervention will be administered in combination with tDCS. tDCS will be applied every other day (Monday, Wednesday, Friday) over the course of these two weeks. The purpose of this component is to examine acute changes in weight associated with tDCS in combination with the diet. Also analyse changes in appetite and eating behavior.
4. Phase 4 - Follow up (6 months). During this phase (outpatient) changes in body weight over time will be assessed to evaluate weight maintenance. Subjects will be asked to come back to the laboratory at 1, 3 and 6 months. Also analyse changes in appetite and eating behavior.
Allocation: Randomized, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Investigator), Primary Purpose: Treatment
Active transcranial direct current stimulation (tDCS), Hypocaloric diet, Sham transcranial direct current stimulation (tDCS)
Human Nutrition Research Center on Aging, Tufts University
Not yet recruiting
University of Sao Paulo
Published on BioPortfolio: 2016-11-03T08:08:21-0400
To compare four weeks of transcranial direct current stimulation (tDCS) versus placebo associated with a reduced caloric diet on weight loss, glycemic control and regulators of hunger and ...
The aim of the current research is to evaluate the efficacy of a combination of Mindfulness-Based Stress Reduction (MBSR) and transcranial direct current stimulation (tDCS) to improve cogn...
The purpose of this study is to determine whether transcranial direct current stimulation (tDCS), when combined with different forms of computer based training, improves the ability to dis...
This study explores the effects of mirror therapy and transcranial Direct Current Stimulation (tDCS, Soterix ©) in a randomized factorial controlled trial in which patients will be assign...
The project will investigate the use of a novel neuromodulatory technique, transcranial direct current stimulation (tDCS) in the treatment of patients with major depressive disorder. ...
transcranial Direct Current Stimulation (tDCS) is a non-invasive method of brain stimulation suggested as a therapeutic tool for pain, and is related to reversal of maladaptive plasticity associated w...
Conventional transcranial Direct Current Stimulation (tDCS) has been reported to alleviate persistent auditory hallucinations (AH) in schizophrenia as an add-on intervention. High-Definition tDCS (HD-...
Schizophrenia is a disorder associated with cortical inhibition deficits. Transcranial direct current stimulation (tDCS) induces changes in cortical excitability in healthy subjects and individuals wi...
Transcranial direct current stimulation (tDCS) has been shown to improve measures of executive cognitive function and reduce cigarette consumption. Studies conducted to date have been small, and the r...
Transcranial direct current stimulation (tDCS) has promising antidepressant effects, however, clinical trials have shown variable efficacy. Pre-treatment neurocognitive functioning has previously been...
A technique of brain electric stimulation therapy which uses constant, low current delivered via ELECTRODES placed on various locations on the scalp.
The electrical response evoked in a muscle or motor nerve by electrical or magnetic stimulation. Common methods of stimulation are by transcranial electrical and TRANSCRANIAL MAGNETIC STIMULATION. It is often used for monitoring during neurosurgery.
Application of electric current in treatment without the generation of perceptible heat. It includes electric stimulation of nerves or muscles, passage of current into the body, or use of interrupted current of low intensity to raise the threshold of the skin to pain.
Measurable changes in activities in the CEREBRAL CORTEX upon a stimulation. A change in cortical excitability as measured by various techniques (e.g., TRANSCRANIAL MAGNETIC STIMULATION) is associated with brain disorders.
Removal of tissue with electrical current delivered via electrodes positioned at the distal end of a catheter. Energy sources are commonly direct current (DC-shock) or alternating current at radiofrequencies (usually 750 kHz). The technique is used most often to ablate the AV junction and/or accessory pathways in order to interrupt AV conduction and produce AV block in the treatment of various tachyarrhythmias.
Obesity is the condition in which excess fat has accumulated in the body (mostly in subcutaneous tissues). clinical obesity is considered to be present when a person has a BMI of over 30 (Oxford Dictionary of Medicine). It is becoming increasing common i...
Clinical Research Organization
Contract Research Organization (CRO) provide research services outsourced on a contract basis to the pharmaceutical, biotechnology, healthcare and medical device industries: biopharmaceutical development biologic assay development commercial...