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The fight-or-flight or the fight-flight-freeze-or-fawn [1] (also called hyperarousal or the acute stress response) is a physiological reaction that occurs in response to a perceived harmful event, attack, or threat to survival. [2] It was first described by Walter Bradford Cannon in 1915.
Reaction to stress—as in the flight-or-fight response—is thought to be elicited by the sympathetic nervous system and to counteract the parasympathetic system, which works to promote maintenance of the body at rest. The comprehensive functions of both the parasympathetic and sympathetic nervous systems are not so straightforward, but this ...
The first phase is the fight or flight response – the animal flight zone is included in this. Over penetration of the animal flight zone causes stimulation of the sympathetic nervous system (SNS). The SNS produces localised adjustments and responses; this includes the excretion of large quantities of epinephrine from the medulla of the ...
The fight-or-flight response involves a general sympathetic nervous system discharge in reaction to a perceived stressor and prepares the body to fight or run from the threat causing the stress. Catecholamine hormones, such as adrenaline or noradrenaline , facilitate immediate physical reactions associated with a preparation for violent ...
Fight or Flight is a 2025 action film directed by James Madigan for Sky Cinema and starring Josh Hartnett, Charithra Chandran, Julian Kostov, Katee Sackhoff and Marko Zaror. Premise [ edit ]
The fight-or-flight response is a biological response of humans and other animals to acute stressors. Fight or Flight may also refer to: Fight or Flight, a documentary film; Fight or Flight (2025 film), a British action film; Fight or Flight, a 1996 book documenting battles from the soldier's perspective by military historian Geoffrey Regan
Almond-Buckwheat Granola with Yogurt and Berries. Protein per serving: 21 grams Meet the gold standard of high-protein breakfasts: Greek yogurt. The thick and creamy staple has nearly 20 grams per ...
In evolutionary psychology, people often speak of the four Fs which are said to be the four basic and most primal drives (motivations or instincts) that animals (including humans) are evolutionarily adapted to have, follow, and achieve: fighting, fleeing, feeding and fucking (a more polite synonym is the word "mating").