Theta waves are one of the five types of electrical pulses your brain produces. They tend to happen when you’re lightly sleeping, dreaming, or in a state of deep relaxation. Experts believe they play ...

New research may provide a key to a scientific enigma: How does the awake brain transform sensory input into a conscious experience? The groundbreaking study relied on data collected from electrodes ...

Every 20 seconds, a wave of fresh cerebrospinal fluid rolls into the sleeping brain. These slow, rhythmic blasts, described for the first time in the Nov. 1 Science, may help explain why sleep is so ...

As you sleep, slow waves of electrical activity in your brain seem to help rinse away harmful waste products that could otherwise damage your brain cells. The process may play a role in preventing ...