9I制作厂免费

Smoking is the best-known risk factor for chronic obstructive pulmonary disease (COPD), a debilitating lung condition that can severely limit a person鈥檚 day-to-day activities. But curiously, only a minority of lifelong smokers develops the disease, while non-smokers represent more than 25% of all COPD cases. A new study published today in The Journal of the American Medical Association聽suggests that a developmental mismatch between airway and lung size鈥攁 condition called dysanapsis鈥攃ould answer why.

Years ago, children were warned that smoking could stunt their growth, but now a major study by an international team including the Montreal Neurological Institute at 9I制作厂免费 and the University of Edinburgh shows new evidence that long-term smoking could cause thinning of the brain鈥檚 cortex. The cortex is the outer layer of the brain in which critical cognitive functions such as memory, language and perception take place. Interestingly, the findings also suggest that stopping smoking helps to restore at least part of the cortex鈥檚 thickness.