MentalHealthDaily

Alpha-Synuclein SAA Predicts Parkinson’s Levodopa Response Durability

by GLOOM

Photoreal illustration of CSF biomarker testing alongside dopaminergic neuron pathways, representing PD biomarker stratification.

A 2026 PPMI analysis found that Parkinson’s patients with positive CSF α-synuclein seed amplification assay results kept gaining levodopa benefit over follow-up, while SAA-negative patients showed faster ON-medication motor progression than SAA-positive patients: 0.87 vs. 3.47 MDS-UPDRS Part III points/year in 183 matched SAA-positive and 40 SAA-negative patients.1 Research Highlights ON-state progression split sharply: SAA-positive …

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 …