Our ups and downs are caused by brain chemicals
inherited from earlier mammals.

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  • Habits of a
    Happy Brain

  • Retrain Your Brain to Boost Your Serotonin, Dopamine, Oxytocin

Happy chemicals are meant to do a job, not to be on all the time. When you know what they do in the state of nature, your ups and downs make sense. You can turn your happy chemicals on in new and natural ways when you know how your brain works. Here's a step-by-step plan to do it in 45 days, with lots of new exercises! Read more

  • I, Mammal

  • Why Your Brain Links Status and Happiness

High-status animals get the best mating opportunities and foraging spots. Natural selection built the brain that causes our frustrations. Mammals seek status because it stimulates serotonin, which feels good. You can avoid "junk status" and trigger more serotonin by out-smarting your mammal brain. Read more

  • Beyond Cynical

  • Transcend Your Mammalian Negativity

Cynicism is popular because it stimulates brain chemicals that make us feel good. A cynical lens makes the world look predictable and it makes you look superior. But this negativity hurts you in the long run. You can build a new lens to see a world full of opportunities instead of a world of flaws. Here's how. Read more

Turn on your happy brain chemicals in new ways.
The IMI shows you how.

Your Ups and Downs Are Natural…and also learned


A YouTube training for your mammal brain. It’s fun! And the worksheets guide you to build the new happy circuit you want to have.

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A Brief History of Nearly Everything Neurochemical

by Loretta Graziano Breuning


Tells a mammal that a reward is at hand. The great feeling motivates the body to invest effort in pursuit. Dopamine is triggered by things that promote survival in the state of nature (rich foods, mating opportunity), and by patterns you associate with the rewards of your past. A surge of dopamine paves neural pathways that help a mammal find more rewards in the future. Complex links build, so even small steps toward rewards can turn on your dopamine.


It's triggered when a mammal sees that it's stronger than the mammal next to it. The nice, safe feeling motivates a mammal to do things that stimulate it. That promotes survival in the state of nature where the stronger individual gets the food or mating opportunity. Conflict is bad for survival, so the mammal brain only releases serotonin when it sees that it has the advantage. Your inner mammal seeks serotonin as if your survival depended on it. Frustration often results because the world is full of other mammals seeking advantages too. Your past serotonin surges connected neurons that tell you where to expect more in the future.


Lets a mammal relax and lower its guard in the presence of another mammal. Trust feels good because of oxytocin. In the state of nature, lowered vigilance can bring lethal harm, so the mammal brain is careful about when it releases oxytocin. The birth process involves lots of oxytocin, and a young mammal gradually wires itself to trust things associated with its past oxytocin experiences. Touch triggers oxytocin, but an individual close enough to touch you is close enough to harm you. The mammal brain keeps seeking safe opportunities to enjoy the good feeling of trust.


It's released when a mammal is in pain. It produces a euphoria that masks pain. In the state of nature, this helps an injured mammal escape from harm. The oblivion soon passes because noticing injuries also promotes survival. Endorphin depends on physical pain, but the exertions of laughing, crying, and exercise can stimulate a bit of it too.

But it’s complicated


The brain soon habituates to happy chemicals, so the same-old things stop triggering them. You have to do more to get more. That may be frustrating, but it has motivated survival-promoting behaviors for millions of years.


The brain releases this bad-feeling chemical when an internal or external threat is perceived. Cortisol gets your attention and makes you feel like you will die if you don't make it stop. Your past cortisol spurts connected neurons that turn on your cortisol today. Thus, a brief delay or small disappointment can feel like an urgent survival threat. In the state of nature, this promotes survival by motivating a mammal to act fast when it sees signs of past threats to its safety, food, or reproductive success.


Some of our neural pathways develop into superhighways because of myelin. This substance coats neurons in a way that makes them fast and efficient. Myelin levels are high before age eight, and during puberty, so the experiences of those years build the brain's infrastructure. Electricity flows effortlessly down your myelinated neurons, which gives you the feeling that you are on track for rewards and avoiding pain. Leaving your myelinated pathways often feels like a survival threat, despite your intentions.

Mirror Neurons

These special neurons fire when a mammal observes others. If you see another mammal get a reward or risk pain, your mirror neurons fire in the same pattern triggered by executing that behavior yourself. This wires you to mirror the behaviors you observe. Without effort or intent, a young mammal wires it to seek rewards and avoid pain by seeing what works for others.

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