Effect of Transcranial Direct-current Stimulation in Eating Behavior of Women With Fibromyalgia

Summary

Introduction: Fibromyalgia (FM) is a syndrome characterized by generalized musculoskeletal pain, fatigue, non-repairing sleep, cognitive changes, depressive symptoms and other correlates of autonomic dysfunction. A high prevalence of overweight in patients with fibromyalgia is observed, about 80% according to current data, which affects the course and prognosis of the disease, besides overburdening health costs and further compromising quality of life. life of these patients. Evidence shows possible pathophysiological pathways shared by these two pathologies, as well as aspects related to food behavior. It is known that dopaminergic neurotransmission is altered in both, suggesting an increase in the sensitivity or density of D2 dopamine receptors. Non-pharmacological options for pain management and dysfunctional eating behavior include the important contribution of neuromodulatory techniques of non-invasive cerebral stimulation, such as transcranial direct current stimulation (tDCS), which aims to increase resisting hyperpalatable foods and reducing caloric intake. Objectives: To evaluate the association between dopamine receptor-2 (DRD2) Taq1A allele A1 polymorphism (rs1800497) and to observe the possible effect of tDCS on the dorsolateral prefrontal cortex (DLPFC) on homeostatic and hedonistic aspects of eating behavior in women with FM. Methods: A randomized, double blind, parallel group, controlled trial with simulated treatment will be performed. Will be included in the study women literate, right-handed, with confirmed diagnosis of FM. The evaluation will be done through questionnaires on pain and eating behavior, anthropometric evaluation and biochemical measurements. The intervention will take place through active or simulated home for 4 weeks. Perspectives: To evaluate dysfunctional neuroplastic changes in eating behavior and biological markers and also to serve as a basis for future effective treatment strategies through neuromodulation and nutritional counseling.

Conditions

• Fibromyalgia
• Food Addiction

Interventions

DEVICE

Sham transcranial direct current stimulation (tDCS)

For sham treatment we will use the same assembly as the active ETCC. However, we will apply the current for 30s at the start of the stimulation session and 30s at the end of the session.

DEVICE

Active transcranial direct current stimulation (tDCS)

Transcranial direct current stimulation (tDCS) it is a therapeutic method that modulates membrane potential, where anodic stimuli induce cortical excitability and cathodic stimuli reduce it. The position of the electrodes will be performed based on a 10-20 system according to the international EEG unit system, with the location of the electrodes at C3 and F3, respectively. The anode will be positioned over the left hemisphere at C3 while the cathode will be positioned over the contralateral hemisphere F3. During active stimulation a 2.0mA current released by a 35 cm2 electrode will be used for 20 min.

Sponsors & Collaborators

• Hospital de Clinicas de Porto Alegre

  lead OTHER

Principal Investigators

• Wolnei Caumo, Md PhD · Hospital de Clinicas de Porto Alegre

Study Design

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

QUADRUPLE

Model

PARALLEL

Eligibility

Min Age

18 Years

Max Age

65 Years

Sex

FEMALE

Healthy Volunteers

No

Timeline & Regulatory

Start

2019-09-15

Primary Completion

2020-11-15

Completion

2021-12-15

Countries

• Brazil

Study Locations