Stress
5 questions tagged Stress — spanning every one of the seven Ws.
When was the first description of the fight-or-flight response published?
Walter Cannon developed and described the fight-or-flight response in the early 20th century, with major work published in 1915.
How does stress affect the brain over time?
Short-term stress can sharpen attention, but long-term stress can disrupt sleep, memory, and mood. Prolonged cortisol exposure is linked to changes in the hippocampus and prefrontal cortex.
Why do people sometimes freeze instead of fighting or fleeing?
Freezing is an automatic threat response that can happen before action choices are made. It may help the brain assess danger and avoid detection.
When was the first evidence that stress hormones affect the brain published?
Clear evidence linking stress hormones to brain effects came in the mid-20th century. Hans Selye’s stress research began in the 1930s.
How does stress affect the brain?
Short-term stress can sharpen alertness, but long-term stress can impair memory, mood, and decision-making. The hormone cortisol plays a major role.