Tobacco smoking produces widespread dominant brain wave alpha frequency increases
| Autor: | Huilei Zhang, Lisong Ni, Michael P. Thompson, Ippei Ohya, Takeshi Sakaki, Edward F. Domino, Hiromi Fukai, Hiroki Shikata |
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| Rok vydání: | 2009 |
| Předmět: |
Adult
Male Time Factors medicine.medical_treatment Physiology Alpha (ethology) Stimulation Electroencephalography Tobacco smoke Article Nicotine Young Adult Heart Rate Physiology (medical) medicine Humans Volunteer Communication medicine.diagnostic_test business.industry General Neuroscience Smoking Brain Stimulant Alpha Rhythm Neuropsychology and Physiological Psychology Psychology business Reticular activating system medicine.drug |
| Zdroj: | International journal of psychophysiology : official journal of the International Organization of Psychophysiology. 74(3) |
| ISSN: | 1872-7697 |
| Popis: | The major pharmacological ingredient in tobacco smoke is nicotine, a mild stimulant known to alter brain electrical activity. The objective of this study was to determine if tobacco smoking in humans produces localized or widespread neocortical dominant alpha electroencephalographic (EEG) frequency increases consistent with nicotine stimulation of the brainstem activating system in animals. Twenty-two male volunteer non-deprived tobacco smokers were studied. They were asked not to smoke for at least 1 h before the experiment in mid-morning as part of their usual smoking schedule. In the laboratory, they sham smoked and then smoked their favorite tobacco cigarette. Two experimental sessions (#1 and #2) were conducted, separated by a one to two month interval. In both sessions, there were minor statistically significant increases in the dominant alpha frequencies after sham smoking. In both sessions, after the subjects smoked a favorite tobacco cigarette there was a significant generalized increase in dominant alpha EEG frequencies in most scalp recording sites. This study demonstrates that tobacco smoking produces widespread bilateral neocortical increases in dominant alpha EEG frequencies consistent with the stimulant effects of nicotine on the brainstem reticular activating system. |
| Databáze: | OpenAIRE |
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