The very first pages introduce "mood-organs", dialled up to suppress or stimulate feelings among a needy population.
In the 1990s, researchers isolated an extract of the plant called P57, which is thought to stimulate feelings of satiety in the brain.
The capsaicin found in chili peppers may release substances within the brain which control pain as well as stimulate feelings of well-being.
But the charity said people retained an "emotional memory" despite the disease and that seeing loved ones could "stimulate feelings of familiarity, happiness, comfort and security".
On the contrary, what I have thought about things like computer games — what has disturbed me about them — is that they appear to stimulate feelings of aggression without providing any physical release.
"They're nutty and delicious and it's got all sorts of amazing natural chemicals in that dilate the blood vessels, stimulate feelings of happiness, and power you as well," he says.
But any kind of change can stimulate feelings that prompt emotional eating.
The National Institute on Drug Abuse notes that while MDMA may stimulate feelings of emotional warmth, empathy and decreased anxiety, it can also cause aggression, sleep disturbances, hyperthermia and organ failure.
Being an outlier within one's social group can stimulate feelings of social isolation that activate the pain center in the brain.
So give them work that keeps them intellectually stimulated and feeling appreciated – for example, frequent rotation into new and different expat assignments or leadership roles on cross-cultural teams.
The research showed favourite places stimulated a feeling of belonging, of being physically and emotionally safe, and of a strong internal pull to the place.
