Et foredrag fra Stanford Universitet om depression

Professor Robert Sapolsky fra Stanford University taler om depression. Han vender flere gange tilbage til, at depression er en biologisk sygdom.

Han definerer dyb depression som:

1. "It's a biochemical disorder with a genetic component with early experience influences, where someone can't appreciate sunsets." - altså "the inability to feel pleassure"
2. Grief
3. Guild
4. Self-injury - risk of suicide