Quote by Steven Kotler

“Stress reduces serotonin, probably the most important neurotransmitter for maintaining a good mood.”

— Rick Hanson

“Dr. Small points out that this atmosphere of manic disruption makes my adrenal gland pump up production of cortisol and adrenaline. In the short…

— Michael Harris

“This brings up a key concept, namely the inverted U. The complete absence of stress is aversively boring. Moderate, transient stress is wonderful—various aspects…

— Robert M. Sapolsky

Dopamine makes up less than one percent of the brain's neurotransmitters. It's a small portion. Dopamine is released when people are happy, angry, stressed.…

— Carl Hart

Mood reflects the biology of the brain. How you feel is affected by the chemicals in the brain, and these are the same chemicals…

— Liz Miller

“Thus, shorter refractory periods mean a higher rate of action potentials. So is testosterone causing action potentials in these neurons? No. It’s causing them…

— Robert M. Sapolsky

The anterior cingulate fires up as the end result of a series of events. First, estrogen levels fall. Meanwhile, serotonin, the feel-good neurotransmitter, also…

— Anonymous

“Brain serotonin levels can be increased by taking the nutritional supplements tryptophan or its closely related 5-hydroxytryptophan (5-HTP).”

— William Davis

My brain acts bizarrely and I keep having major mood swings.

— Gareth Thomas

Certain rhythms just have certain moods.

— Dennis Brown

“Environmental influences also affect dopamine. From animal studies, we know that social stimulation is necessary for the growth of the nerve endings that release…

— Gabor Maté

“testosterone increases the excitability of amygdaloid neurons, and glucocorticoids decrease excitability of prefrontal cortical neurons.”

— Robert M. Sapolsky