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A study of professional mountain climbers has shown that high-altitude exposure can cause subtle white and grey matter changes to the area of the brain involved in motor activity, as per the recent issue of the European Journal of Neurology Italian scientists took MRI scans of nine world-class mountain climbers, who had been climbing for at least 10 years, before and after expeditions to Mount Everest (8,848 metres) and K2 (8,611 metres) without an oxygen supply. They compared their MRI brain scans with 19 age and sex matched healthy control subjects........

A nerve cell is a major hub for the exchange of valuable information. The nose, eyes, ears, and other sense organs perceive our environment through various antennae known as receptors. The numerous stimuli are then passed on to the neurons. All of this information is collected, processed, and finally transferred to specific brain centers at these hubs - the human brain consists of almost 100 billion nerve cells. The nerve cell uses a special means of transport for this purpose: the action potential which codes the information, thus enabling communication between the nerve cells........

URBANA, Ill. (MedPage Today) -- For children with attention deficit hyperactivity disorder, a 20-minute walk in the park may improve the ability to concentrate, a small study showed.

RALEIGH, N.C. (MedPage Today) -- If black patients 65 or older sleep poorly, they may be at a higher risk of having memory problems, researchers reported here.

WASHINGTON (MedPage Today) -- An investigational embolic protection system for carotid stenting that combines a filter with aspiration was associated with a 30-day event rate of 3%, the safety threshold recommended by the American Heart Association.