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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.
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 ...
The sympathetic branch of the autonomic nervous system gives rise to a specific set of physiological responses to physical or psychological stress. The body's response to stress is also termed a "fight or flight" response, and it is characterised by an increase in blood flow to the skeletal muscles, heart, and brain, a rise in heart rate and ...
The Fight or Flight Response that may present with symptoms that can induce a panic attack. Panic attacks can be caused by a mix of factors. Biological factors that may lead to panic attacks include psychiatric disorders such as post-traumatic stress disorder (PTSD) and obsessive–compulsive disorder (OCD), heart conditions, low blood pressure ...
The activity of the sympathetic nervous system drives what is called the "fight or flight" response. [4] The fight or flight response to emergency or stress involves increased heart rate and force contraction, vasoconstriction , bronchodilation , sweating , and secretion of the epinephrine and cortisol from the adrenal medulla , among numerous ...
Post-traumatic stress disorder (PTSD) [b] is a mental and behavioral disorder [8] that develops from experiencing a traumatic event, such as sexual assault, domestic violence, child abuse, warfare and its associated traumas, natural disaster, traffic collision, or other threats on a person's life or well-being.
Fear is an unpleasant emotion that arises in response to perceived dangers or threats. Fear causes physiological and psychological changes. It may produce behavioral reactions such as mounting an aggressive response or fleeing the threat, commonly known as the fight-or-flight response. Extreme cases of fear can trigger an immobilized freeze ...
In times of high stress, caused by both visual and auditory triggers, a person's “fight or flight” response can be triggered as they descend into a state of hyper-arousal. This is an evolutionary response involving the sympathetic nervous system that is triggered as a reaction to a perceived threat to the individual's life to help increase ...