[Senior brain - the influence of life experience on cognitive functions].

Time-related ageing of the organism brings about the limitations to all human beings. The ageing process pertains to all organs and neither does it spare the brain, although, apart from neurodegenerative diseases, the changes in brain's functions seem to be less detectable. Many studies that were conducted for years in ageing adults provide evidence that lifestyle in which psychic and physical activity is maintained significantly and positively affects brain plasticity, i.

[The influence of sleep deprivation on the cognitive processes in medical students during exam session].

Background: Along with socio-economic pression increase in developed countries, the progressive shortening of night sleep has been observed. Sleep plays a vital role in human organism regeneration, and its deprivation leads to a series of adverse psychosomatic effects, including intellectual performance limitation or reducing body immunity, which increases susceptibility to diseases. Chronic sleep deprivation, quite often affecting medical students, significantly contributes to hypersomnia and leads to chronic fatigue.