MentalHealthDaily

GABA and Dopamine Shape Human Speech Control in PET-fMRI Study

by GLOOM

MHD featured image for GABA and dopamine interactions during human speech control.

A 2026 PET-fMRI study of 20 healthy adults found that GABAA receptor binding tracked speech-production brain activity across frontal, temporal, parietal, putaminal, supplementary motor, and cerebellar regions, with peak GABA-BOLD correlations reaching Rs = 0.9.1 Human speech control looks less like a pure motor-output problem and more like a task-specific balance between inhibition, dopamine, and …

Transcranial Temporal Interference Stimulation (tTIS) May Improve Parkinson’s Motor Symptoms

by GLOOM

Photoreal illustration of two interfering electric fields converging at deep brain regions, conveying non-invasive deep stimulation in Parkinson's.

Deep brain stimulation works for Parkinson’s, but it requires implanted electrodes. A 2026 randomized crossover trial by Stalter and colleagues tested whether transcranial temporal interference stimulation — a non-invasive technique designed to reach deep targets without exciting overlying cortex — can move the needle on motor symptoms when aimed at the putamen.1 Research Highlights Transcranial …