Optical illusions reveal regular waves of brain activity enable visual feature integration

Rhythmic waves of brain activity cause us to see or not see complex images that flash before our eyes. An image can become practically invisible if it flashes before our eyes at the same time as a low point of those brain waves. We can reset that brain wave rhythm with a simple voluntary action, like choosing to push a button.
Source: EurekaAlert, https://www.eurekalert.org