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Emotional eating, also known as stress eating and emotional overeating, [1] is defined as the "propensity to eat in response to positive and negative emotions". [2] While the term commonly refers to eating as a means of coping with negative emotions, it sometimes includes eating for positive emotions, such as overeating when celebrating an event or to enhance an already good mood.
Hyperpalatable foods have been shown to activate the reward regions of the brain, such as the hypothalamus, that influence food choices and eating behaviours. [7] When these foods are consumed, the neurons in the reward region become very active, creating highly positive feelings of pleasure so that people want to keep seeking these foods regularly.
A food addiction or eating addiction is any behavioral addiction characterized primarily by the compulsive consumption of palatable and hyperpalatable food items. Such foods often have high sugar , fat, and salt contents ( HFSS ), and markedly activate the reward system in humans and other animals.
Allostasis occurs at the cellular and systems levels. When humans are chronically stressed, the brain chronically raises blood pressure; then arterial muscles predict higher pressure and respond with hypertrophy (like skeletal muscles when we lift weights). Gradually the whole cardiovascular system adapts to life at an elevated pressure level.
Stress appears to play a role in hypertension, and may further predispose people to other conditions associated with hypertension. [48] Stress may precipitate abuse of drugs and/or alcohol. [5] Stress may also contribute to aging and chronic diseases in aging, such as depression and metabolic disorders. [49]
Bulimia nervosa, also known simply as bulimia, is an eating disorder characterized by binge eating (eating large quantities of food in a short period of time, often feeling out of control) followed by compensatory behaviors, such as vomiting, excessive exercise, or fasting to prevent weight gain.
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In humans, the nervous system is composed of the central and peripheral nervous system, with little known about the specific mechanisms of neurotransmitters in most other vertebrates. However, it is known that while serotonin is involved in stress and behavioral responses, it is also important in cognitive functions . [ 200 ]