DEEP DIVE · CHAPTER 25
The Anti-Reward Hub
The habenula is the brain’s anti-reward hub, a small brake that shuts dopamine down. The Chapter 25 Deep Dive sets out the evidence for it, scrutinized harder than any other mechanism in the book, including the parts that still do not add up.
Two structures the size of a grain of rice sit behind your thalamus, and their whole job is to switch dopamine off. I think this is the most exciting mechanism in the book, which is exactly why I give it the hardest scrutiny in the book. Here is the brake, the evidence for it, and everything about it that still does not add up.
13 pages · 19 references, every one verified · written by Dr. Gurpreet Singh Padda, MD, MBA, MHP
Watch Chapter 25
The chapter on video — the same argument, with the figures and the studies on screen as they come up.
The receipts behind Chapter 25
The book makes the argument. This Deep Dive shows the evidence, claim by claim: the study, who was in it, the number and where it sits in the paper, what it does not show — and the questions to bring to your own physician. It is written to be shared with your doctor.
Enter your name, email and mobile number. The Chapter 25 PDF arrives by email within a few minutes, and the other thirty Deep Dives arrive one a week, in order. We do not send marketing texts; your number is there so we can reply if you ask us something.
Frequently asked questions
What does the habenula do?
The habenula is the brain’s anti-reward hub. Its whole job is to switch dopamine off, working as a small brake on the dopamine system. Chapter 25 of The Dopamine Brain sets out the evidence for that brake, with 19 verified references: each study, who was in it, and what it does not show.
Where is the habenula in the brain?
The habenula sits behind the thalamus. It is not one structure but two, each about the size of a grain of rice. Small as they are, their job is large: they shut dopamine down. The Chapter 25 Deep Dive covers where this brake sits, what it does, and the studies behind it, in 13 pages written to be shared with your doctor.
How strong is the evidence for the habenula as an anti-reward brake?
Dr. Padda calls it the most exciting mechanism in the book, which is exactly why he gives it the hardest scrutiny in the book. The Chapter 25 Deep Dive lays out the evidence for the brake and then everything about it that still does not add up, so you can weigh it yourself rather than take the idea on faith.
Educational material, not medical advice. If you are in the St. Louis area and want this looked at properly, that is what the Addictionology Center is for.
