diltiazem cd 120 mg The attention is a concentration of mental activity on certain object. By means of attention selection of the necessary information is provided. Nejrofiziologichesky mechanisms of attention are connected with displays of a rough reflex, with local processes of activation of a cerebral cortex, and also with emotional conditions and biological requirements of an organism. The selective attention is possible only at a condition raised, but not excessively high wakefulness which on ЭЭГ is characterised high-frequency десинхронизированными by fluctuations of low amplitude with rare occurrence of groups of the synchronised alpha will. To diffuznym forms of attention there correspond conditions of the weakened wakefulness with accurately expressed synchronised alpha rhythms. The absent-minded attention often arises in a condition of strong excitation, thus on ЭЭГ electric activity is registered десинхронизированная high-frequency низкоамплитудная. Anatomic substratum of regulation of various forms of attention is ретикулярная the formation of a trunk of a brain, диффузная таламическая system, субталамус and гипоталамус. Nonspecific таламическая the system is considered as the filtering mechanism possessing ability to switch attention from one irritants on others. Associative zones of a bark are the central link in system of the mechanisms regulating selection of the information, selective forms of perception, attention and consciousness. Physiological bases of speech. Липиды are difficult aethers of glycerine and the higher fat acids. Fat acids happen sated and nonsaturated (containing one and more double communications). Липиды play an organism a power and plastic role. At the expense of oxidation of fats it is provided about 50 % of requirement for energy of an adult organism. Fats serve as a reserve of a food of an organism, their stocks at the person on the average make 10 - 20 % from weight of a body. From them about half are in hypodermic fatty клетчатке, a significant amount is postponed in the big epiploon, околопочечной клетчатке and between muscles. In a hunger condition, at action on a cold organism, at physical or psychoemotional loading there is an intensive splitting of the reserved fats. In the conditions of rest after food intake occurs ресинтез and adjournment липидов in depot. The main power role is played by neutral fats - триглицериды, and plastic carry out фосфолипиды, cholesterol and fat acids which carry out functions of structural components of cellular membranes, are a part липопротеидов, are predecessors of steroid hormones, bilious acids and простагландинов.