18.43 It's been a long night and day of Oscar coverage, and we'll be rounding this live blog off soon. But, before we do, I think it's important to point out that someone on Twitter has made a fish-related Oscars joke. (Oscar fish, incidentally, are a type of cichlid.
For other uses, see Fight or Flight. The fight-or-flight response (also called the fight, flight, freeze, or fawn response [in PTSD ], hyperarousal, or the acute stress response) is a physiological reaction that occurs in response to a perceived harmful event, attack, or threat to survival. It was first described by Walter Bradford Cannon.
fight-or-flight response in Medicine Expand. fight-or-flight reaction n. A set of physiological changes, such as increases in heart rate, arterial blood pressure, and blood glucose, initiated by the sympathetic nervous system to mobilize body systems in response to stress. Also called emergency theory. fight-or-flight response. A physiological reaction in response to stress, characterized by an increase in heart rate and blood pressure, elevation of glucose levels in the blood, and redistribution of blood from the digestive tract to the muscles.