A healthy mind in a healthy body. Science confirms more than ever this Latin proverb. The researchers continue to check by grinds experiments that l' physical-activity decreases the symptoms of the depression and l' anxiety and qu' it increases the capacity of concentration while intervening on the neurochimy of the brain, on its rate d' oxygenation and on connections between the neurons. Michael Babyak, of l' Duke university in North Carolina, showed that l' antidepressant effect of l' exercise would be as powerful as that of the drugs, which raise l' effectiveness of the neurons with serotonin and which, by this action, manage to dissipate the depressive symptoms. In d' other terms, like the antidepressants, l' physical-activity increases the serotonin concentration on the level of the brain. During l' exercise, of the hormones, known as neuromodulatrices, are secreted on the level of the muscles and join the brain, where they will have an impact on certain neuro-transmitters, such as the serotonin, which is associated with l' antidepressant effect, as well as the dopamine and the norépinéphrine, which intervene in the circuits of l' attention and of the executive functions, like planning d' a task, underlines Dave Ellemberg, professor and researcher at the department of kinesiology of l' University of Montreal. Regular practice of l' physical-activity raises also the release of factors neurotrophic derived from brain (BDNF) mainly on the level of the hippocampi of the brain, where they stimulate the synaptogénèse, c' be-with-to say the production of new connections (or synapses) between the neurons. “L' physical-activity has not only one impact on l' mood, but also on the memory. Studies in imagery showed at the people who make l' exercise systematically a packing synaptic in the area of the temporal lobes where the hippocampi [sites of the memory] are. And that results in an increase in the mnemic capacities”, explains the researcher. Dave Ellemberg also recalls that the meetings d' physical-activity increase l' blood contribution towards the brain and consequently increase l' oxygenation of the neurons, of which l' s' activity; intensify. On electroencephalograms (EEG) obtained after d' a meeting d' exercises, it is indeed possible to see an increase in l' intensity of l' neuronal activity which is normally associated with the executive functions and with l' caution. It appears also increasingly obvious qu' a regular physical-activity delays the cognitive losses which occur during ageing, underlines the researcher before specifying that l' exercise slows down significantly the progression of the disease d' Alzheimer.
June 24, 2009
Tags :
Healthy
Subscribe by Email
Follow Updates Articles from This Blog via Email
No Comments