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Beta wave, or beta rhythm, is the term used to designate the frequency range of brain activity above 12 Hz (12 transitions or cycles per second). Beta states are the states associated with normal waking consciousness. Low amplitude beta waves with multiple and varying frequencies are often associated with active, busy, or anxious thinking and active concentration. Rhythmic beta with a dominant set of frequencies is associated with various pathologies and drug effects. For instance, beta activity can be accentuated by sedative-hypnotic drugs such as benzodiazepines or barbiturates.^{[citation needed]} It can also be absent or reduced if the patient underwent cortical damage.

Beta Waves are also split into three sections: High Beta Waves (19Hz+); Beta Waves (15-18Hz); and Low Beta Waves (12-15Hz).

[edit] See also

• Electroencephalography
• SMR
• Sensory Integration Dysfunction
• Holonomic brain theory
• Sleep
• Alpha rhythm
• Delta rhythm
• Gamma rhythm
• Theta rhythm

v·d·e Articles on sleep
Sleep stages	Rapid eye movement sleep · Non-rapid eye movement sleep · Slow-wave sleep · Beta wave sleep · Delta wave sleep · Gamma wave sleep · Theta wave sleep
Sleep disorders	Advanced sleep phase syndrome · Automatic behavior · Circadian rhythm sleep disorder · Delayed sleep phase syndrome · Dyssomnia · Hypersomnia · Insomnia · Narcolepsy · Night terror · Nocturia · Nocturnal myoclonus · Non-24-hour sleep-wake syndrome · Ondine's curse · Parasomnia · Sleep apnea · Sleep deprivation · Sleepeating · Sleeping sickness · Sleeptalking · Sleepwalking
Benign phenomena	Consciousness states ·Dream · Dream content · Exploding head syndrome · False awakening · Hypnagogia · Hypnic jerk · Lucid dream · Nightmare · Nocturnal emission · Sleep paralysis · Somnolence ·
Other Sleep-related Topics	Chronotype · Electrosleep treatment · Hypnotic drugs · Napping · Jet lag · Lullaby · Polyphasic sleep · Segmented sleep · Siesta · Sleep and learning · Sleep debt · Sleep inertia · Sleep onset · Sleep treatment · Sleep wake cycle · Snoring

This page uses content from the English-language version of Wikipedia. The original article was at Beta rhythm. The list of authors can be seen in the page history. As with Psychology Wiki, the text of Wikipedia is available under the GNU Free Documentation License.