Tachypnea is rapid, shallow breathing, not accompanied by a violation of its rhythm. Tachypnea is a subjective type of inspiratory dyspnea (see), which is not accompanied by objective signs (forced posture, cyanosis , auxiliary muscles in the act of breathing). In healthy people tachypnea can be observed during physical work or nervous excitement. The most common cause of tachypnea is a violation of the functional relationships of the cortex with the lower parts of the central nervous system, with the appearance of the so-called neuroses of the respiratory system. In case of hysteria, tachypnea is manifested by an increase in the number of breaths up to 100 or more per 1 minute. and reminds "dog breath." Tachypnea can be observed in some cases of poisoning as a result of exposure to the respiratory center of the oxidized products of metabolism, with pains in the chest and abdomen, which limit the respiratory movements. Tachypnea is also observed with increasing body temperature.