The “fight-or-flight” response evolved in our distant ancestors to prime their hearts, muscles and lungs for action, giving them that vital extra boost to escape ravenous predators or see off aggressive rivals. After the immediate threat had passed, a “relaxation” or “rest and digest” response kicked in to restore their overexcited bodies to a state of calm better suited for more restful activities, such as feeding and grooming.

But in modern humans, technologies such as social media and email can keep our fight-or-flight response constantly switched on by continually presenting us with stimuli that provoke feelings of excitement, fear or aggression.

Continue reading “What happens in your brain as you check your emails?” →