Beta waves are more desynchronized (inconsistent in pattern) than other brain wave types because they represent brain function patterns when you are engaged in multiple types of activities and tasks, from cognition, to processing sensory or experiential input, to moving around and hand-eye coordination, to visual acuity.

Low Beta, ranging from 12 to 15 Hertz, feels focused, but relaxed, and is inhibited by motion. Mid Beta, from 15 to 18 Hertz, feels like active thinking, with awareness of both self and surroundings. High Beta, from 18 to 36 Hertz, feels very alert with agitation possible. All of these Beta states may be localized in one part of the brain. Gamma, or extra high Beta, in frequencies from 36 to 44 Hertz is not localized but found in all parts of the brain, and is potentially the state used when the brain needs to process information from multiple sources at once.

While Beta states are good for thinking and processing, you can spend too much time in Beta, and essentially "spin your mental wheels" by thinking too long or too deeply about things of little consequence. Beta is not a state for reflection or rest, and as such, spending too much time in Beta can increase your blood pressure and produce anxiety. The function of relaxation belongs to Alpha states.