Have you ever experienced a churning stomach before giving a presentation, or gotten goosebumps upon hearing a beautiful singing voice? These physiological reactions are caused when the brain releases a chemical — cortisol in times of stress or oxytocin in times of pleasure — in response to whatever emotional event you’re experiencing. The response also demonstrates how closely our mental and physical health are linked. One can have a direct impact on the other, which can affect your overall health and wellbeing. It's known as the mind-body connection.