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Depression

2 articles

PET brain scan showing colorful activity patterns in different brain regions

Scientists Can Now Watch Ketamine Reshape a Depressed Brain in Real Time

A PET imaging study reveals how ketamine changes receptor density across specific brain regions, offering the first clear map of why the drug works so fast.

Casey Cooper·March 12, 2026

Person looking out window at gray winter day with light therapy lamp nearby

Answers

What Is Seasonal Affective Disorder and How Do You Treat It?

Seasonal affective disorder is a type of depression that follows a seasonal pattern, typically starting in fall and lifting in spring, caused by reduced sunlight affecting brain chemistry.

Jordan Mitchell·December 3, 2025

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