Stress is a physiological response that can involve increased heart rate, breathing, and blood flow redistribution, leading to hypervigilance with a narrowed focus.

“Stress is a physiological response. It involves quickening of the heart rate. Typically quickening a breathing, blood flow getting shuttled to certain areas of the brain and body and not to others. It can create a hypervigilance or an awareness. Typically that awareness is narrower, literally narrower in space, like a soda straw view of the world than when we are relaxed.”