The cognitive abilities of individuals who consume both tobacco and alcohol as “allies” are severely impaired. This may be due to the long-term harmful effects of the nicotine addiction.
Among those with alcohol addiction, the incidence of smoking is significantly higher. Tobacco is negatively associated with IQ and cognitive function, according to Dr. Jennifer M. Glass from the University of Michigan (USA).
Glass’s research findings seem counterintuitive, as many smokers assert that they feel more alert and focused after lighting a cigarette. However, the improved neurological function is merely an immediate effect of nicotine; long-term addiction leads to the opposite effect.
To explore the “diabolical” relationship between alcohol and tobacco, Glass and colleagues examined the brain function of 172 individuals, including 103 alcoholics. The research team found that those in the high-risk group on the Lifetime Alcohol Problems Scale (LAPS) and those who smoked more than a pack of cigarettes daily had very low IQ scores. Their performance on cognitive tests related to speed and accuracy, such as short-term memory, language reasoning, and mathematical skills, was also low.
The analysis results indicate that smoking is a strong and clear predictor of poor cognitive function, more so than alcohol addiction. Smoking also deteriorates language reasoning abilities. According to Glass, this phenomenon may be due to several mechanisms directly related to the reduction of blood flow to the brain.
Mỹ Linh (according to Reuters)