Do you tend to dwell on upsetting thoughts? Does your arousal thermostat feel like it’s set too high, making it hard for your body to relax and fall or stay asleep? Insomnia is often described as a disorder of hyperarousal, yet how and why the hyperarousal develops is unclear.
Now a team of 13 sleep scientists from three countries have taken findings from different lines of research, conducted a study of their own, and come up with a plausible explanation for why our minds and bodies feel like they’re stuck in overdrive and just can’t stop. Here’s what may lie behind our trouble falling and staying asleep.