Medicine
Neurobiological Underpinnings of Treatment-Resistant Depression
Quick fact
Up to one-third of people with major depressive disorder do not achieve remission after two or more adequate antidepressant trials, and this chronic lack of response is linked to measurable changes in glutamate and GABA signaling—not just a 'chemical imbalance' of serotonin or dopamine.
Why this is interesting
When antidepressants fail, many patients are told they have 'treatment-resistant' depression—but what is actually wrong in the brain? Why do the most common medications stop working for millions of people?