| 1. | Electroencephalograph (EEG) is a tool used for gauging and recording brain |
| 2. | waves. In 1929, Hans Berger, the German psychiatrist, published the results of |
| 3. | his experiments using the electroecenphalograph in recording human brain |
| 4. | waves. |
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| 5. | Four major brain waves exist: alpha has a frequency that ranges from 8 to 14 |
| 6. | cycles per second (cps) and is found in the occipital part of the brain. Beta |
| 7. | covers 14 to 30 cps. Delta wave includes frequencies that are below 5 cps. Theta |
| 8. | wave covers the range between 5 and 8 cps. Alpha waves are more active |
| 9. | during relaxation and light sleep. Nonetheless, their function is altered by deep |
| 10. | mental activities. Beta waves, on the other hand, appear during mental |
| 11. | concentration periods. |
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| 12. | In 1935, the findings of collaborators Frederic Gibbs, William Lennox, and |
| 13. | Hallowelle Davis from Harvard on the use of EEG in epilepsy was published. |
| 14. | Since EEG poses no pain or side effects, it is broadly included as a medium for |
| 15. | identifying brain irregularities. The EEG is instrumental in discovering a host |
| 16. | of brain wave abnormalities. Persons who suffer from grand mal epilepsy have |
| 17. | brain wave patterns that resemble spikes, while those with petit mal epilepsy |
| 18. | have arch-shaped brain waves. Brain waves respond to physiological and |
| 19. | chemical stimuli. For instance, the use of drugs will result in low-amplitude, |
| 20. | high frequency brain waves. When we are asleep, the waves' pattern changes a |
| 21. | few times. Dreaming frequently happens when the brain waves have high |
| 22. | frequency but low amplitude. |
