In Sickness and In Health Department of Changing the Subject Smoking From something called Eurekanet, (of which I know nothing) via Blondesense comes this interesting piece about some research in Yurp about smoking and brain activity. Check it out: While nicotine is highly addictive, researchers have also shown the drug to enhance learning and memory-a property that has launched efforts to develop nicotine-like drugs to treat cognitive deficits in Alzheimer's and Parkinson's diseases, schizophrenia, and attention-deficit/hyperactivity disorder. A key problem in designing such drugs has been that little was known about the detailed mechanism by which nicotine exerts its learning-enhancing effects. Now, researchers have discovered important details of how nicotine adjusts the signaling properties of neuronal wiring to enhance memory. Such signaling properties include the strength of the connections by which one neuron triggers another. Huibert Mansvelder and colleagues reported their findings in the April 5, 2007, issue of the journal Neuron, published by Cell Press. The researchers made their discoveries by analyzing the electrophysiological properties of neurons in slices of mouse brain, as they treated the slices with nicotine or with drugs that prevent nicotine's action. Specifically, the researchers studied the neurons of the prefrontal cortex, which contain centers for learning and memory. Researchers had known that nicotine enhances learning by activating receptors for the neurotransmitter acetylcholine. Such neurotransmitters are the chemical signals that one neuron launches at another to trigger a nerve impulse in the receiving neuron. In their studies, Mansvelder and colleagues found that by activating acetylcholine receptors, nicotine affects a process called “spike-timing-dependent potentiation†that governs changes in strength of signaling connections among neurons. What's more, the researchers traced this effect to nicotine's action on specific kinds of neurons, called GABAergic neurons, in the learning centers. In turn, the effects on GABAergic neurons affected signaling between neurons mediated by the key substance calcium. The researchers also discovered key details of the mechanisms by which nicotine excites different kinds of “interneurons†in the prefrontal cortex. Interneurons are the way-stations for neuronal impulses, passing neuronal signals from one neuron to another. Smokers are actually much less likely to develop Alzheimer's, 25 or 30%. Remember all of those old nasa launch videos did you ever notice how all the scientists were chain smoking. This also could be the reason there is so many stupid Americans these days, no one is smoking anymore since nicotine can up the I.Q by 30 points in some individuals.
Thats pretty interesting. But I have noticed a lot of people involved in fields that require intense mental thought seem to smoke. Only I had correlated it to stress on the job, never thought there would be a chemical reason behind it
Because cancer will kill them first.. But the rest of this is interesting. I wonder how stupid I would be if I quit smoking cigarettes.