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Network-targeted transcranial direct current stimulation of the hypothalamus appetite-control network: a feasibility study
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Network-targeted transcranial direct current stimulation of the hypothalamus appetite-control network: a feasibility study
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Journal Article
Network-targeted transcranial direct current stimulation of the hypothalamus appetite-control network: a feasibility study
2024
Overview
The hypothalamus is the key regulator for energy homeostasis and is functionally connected to striatal and cortical regions vital for the inhibitory control of appetite. Hence, the ability to non-invasively modulate the hypothalamus network could open new ways for the treatment of metabolic diseases. Here, we tested a novel method for network-targeted transcranial direct current stimulation (net-tDCS) to influence the excitability of brain regions involved in the control of appetite. Based on the resting-state functional connectivity map of the hypothalamus, a 12-channel net-tDCS protocol was generated (Neuroelectrics Starstim system), which included anodal, cathodal and sham stimulation. Ten participants with overweight or obesity were enrolled in a sham-controlled, crossover study. During stimulation or sham control, participants completed a stop-signal task to measure inhibitory control. Overall, stimulation was well tolerated. Anodal net-tDCS resulted in faster stop signal reaction time (SSRT) compared to sham (
p
= 0.039) and cathodal net-tDCS (
p
= 0.042). Baseline functional connectivity of the target network correlated with SSRT after anodal compared to sham stimulation (
p
= 0.016). These preliminary data indicate that modulating hypothalamus functional network connectivity via net-tDCS may result in improved inhibitory control. Further studies need to evaluate the effects on eating behavior and metabolism.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
