S1 and S2 are the normal heart sounds you hear when the heart valves close. Heart murmurs are extra sounds that can be heard during systole, diastole, or as a continuous sound. S3 and S4 are abnormal ...

Have you heard of binaural beats? It’s a technique that’s been around for a while, but recently is getting a lot of attention for its ability to lower stress and improve sleep, as well as to improve ...