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Gamma Brain Stimulation Helps Schizophrenia More Than Depression

Photoreal illustration of gamma-frequency brain stimulation showing TMS coil and oscillation waveforms in 30-50 Hz range over a brain.

A 2026 meta-analysis of 56 controlled trials found the clearest gamma-frequency neuromodulation signal in schizophrenia: overall symptoms improved vs. control (g = −0.46), global cognition improved (g = 0.55), and MDD showed a smaller depression effect than the schizophrenia symptom estimate (g = −0.34). Bipolar disorder and autism stayed directional but nonsignificant, and the paper’s …

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

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 …

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