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Temporal interference electrical neurostimulation yields fMRI BOLD activation in humans

Modak, P.; Fine, J.; Colon, B.; Need, E.; Hulvershorn, L.; Finn, P.; Brown, J.

2024-03-06 neuroscience
10.1101/2024.03.02.583125 bioRxiv
Show abstract

Temporal interference electrical neurostimulation (TI) is a relatively new method of non-invasive neurostimulation that may be able to stimulate deep brain regions without stimulating the overlying superficial regions. Despite studies in rodents, almost no studies have investigated its effects on human brain activity along with safety and tolerability profiles. We performed simultaneous TI stimulation and fMRI to investigate the effects of TI on human BOLD signals. Here we show that TI can induce increased BOLD activation in humans, with good safety and tolerability profiles. We also show the limits of spatial precision and explore the nature and causes of additional off target effects. TI may be a promising approach for addressing questions about the causal role of deep brain structures in human cognition and may also afford new clinical treatments.

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