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Archive for the 'Neuroscience and Psychophysiology' Category

December 28, 2005

How alcohol works in the brain!

The gap where an electrical signal jumps from one neuron to another is called the synaptic cleft. This is a closeup of the cleft between one neuron and another.

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October 11, 2005

Long-term smokers risk lower IQs!

Filed under: Neuroscience and Psychophysiology,Western Europe — Admin @ 10:10 pm

London : For long smoking has been regarded as a stimulant that helped intellectuals concentrate better, but now a study has revealed that at the end of the day it may end up hampering your thinking ability and lowering your IQ.

The nearly 20 year study conducted by researchers from the University of Michigan has revealed years of tobacco use dims the speed and accuracy of a person’s thinking ability, besides bringing down the IQ levels.

Studies conducted on 172 alcoholic and non-alcoholic men revealed that long-term alcoholism and smoking has a profound effect on a person’s thinking ability.

The study revealed that smoking had an adverse effect on memory, problem-solving and IQ in those who had smoked for years.

The findings published online by the journal Drug and Alcohol Dependence said that among alcoholic men, smoking was associated with diminished thinking ability even after alcohol and drug use were accounted for.

The study further revealed that smoking was associated with diminished thinking ability even among men without alcohol problems.

Lead author Jennifer Glass, Ph.D., a research assistant professor in the U-M Department of Psychiatry, has however said that the findings needed to be duplicated by other studies before any conclusions were derived at, about the negative effects smoking had on the human brain.

“We can’t say that we’ve found a cause-and-effect relationship between smoking and decreased thinking ability, or neurocognitive proficiency. But we hope our findings of an association will lead to further examination of this important issue. Perhaps it will help give smokers one more reason to quit, and encourage quitting smoking among those who are also trying to control their drinking,” she said.

“The exact mechanism for smoking’s impact on the brain’s higher functions is still unclear, but may involve both neurochemical effects and damage to the blood vessels that supply the brain. This is consistent with other findings that people with cardiovascular disease and lung disease tend to have reduced neurocognitive function,” said Robert Zucker, Ph.D., professor of Psychology in the U-M Departments of Psychiatry and Psychology, Director of the UMARC and senior author on the new paper led by Glass.

Source: Newkerala

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