The fight-or-flight response, also called hyperarousal or the acute stress response, was first described by Walter Cannon in 1915 . His theory states that animals react to threats with a general discharge of the sympathetic nervous system, priming the animal for fighting or fleeing.
Stressor Posttraumatic stress disorder Sympathetic nervous system Stress (medicine) Tend and befriend Emotional dysregulation Pupillary response Inhibitor Adrenal medulla Goose bumps Lacrimal gland Walter Bradford Cannon Catecholamine Sphincter Locus ceruleus Acute stress reaction Stimulus (physiology) Vasoconstriction Hypothalamic-pituitary-adrenal axis Panic disorder Brain stem Parasympathetic nervous system Panic attack Autonomic nervous system Adrenal gland Norepinephrine Acetylcholine Hypothalamus Homeostasis Combat Receptor (biochemistry) Epinephrine Neuron
