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Mental chronometry is the scientific study of processing speed or reaction time on cognitive tasks to infer the content, duration, and temporal sequencing of mental operations. Reaction time (RT; also referred to as " response time ") is measured by the elapsed time between stimulus onset and an individual's response on elementary cognitive ...
Starvation response. Starvation response in animals (including humans) is a set of adaptive biochemical and physiological changes, triggered by lack of food or extreme weight loss, in which the body seeks to conserve energy by reducing metabolic rate and/or non-resting energy expenditure to prolong survival and preserve body fat and lean mass.
In neuroscience, nerve conduction velocity ( CV) is the speed at which an electrochemical impulse propagates down a neural pathway. Conduction velocities are affected by a wide array of factors, which include age, sex, and various medical conditions. Studies allow for better diagnoses of various neuropathies, especially demyelinating diseases ...
The Hafele–Keating experiment was a test of the theory of relativity. In 1971, [ 1] Joseph C. Hafele, a physicist, and Richard E. Keating, an astronomer, took four caesium -beam atomic clocks aboard commercial airliners. They flew twice around the world, first eastward, then westward, and compared the clocks in motion to stationary clocks at ...
Fight-or-flight response. A dog and a cat expressing the fight (top) and flight (bottom) response simultaneously. 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]
Records 1912–1976. The first manual time of 9.9 seconds was recorded for Bob Hayes in the final of the 100 metres at the 1964 Olympics. Hayes' official time of 10.0 seconds was determined by rounding down the electronic time of 10.06 to the nearest tenth of a second, giving the appearance of a manual time.
Cut back on salt. Reducing sodium intake is one of the first steps the experts recommend to lose water weight. The Dietary Guidelines for Americans recommend limiting sodium intake to 2,300 ...
High-g training. High-g training is done by aviators and astronauts who are subject to high levels of acceleration (' g '). It is designed to prevent a g-induced loss of consciousness (g-LOC), a situation when the action of g -forces moves the blood away from the brain to the extent that consciousness is lost.