Tachypnea is fast shallow breathing, not accompanied by the violation of his rhythm. Tachypnea is a subjective view of inspiratory breathlessness (see), which is not accompanied objective evidence (involuntary body position, cyanosis, participation in the act of breathing auxiliary muscles). In healthy people tachypnoea may occur at the physical work or nervous excitement. The most common cause tachypnea - violation of the functional relations of the bark with the underlying parts of the Central nervous system with the emergence of the so-called neuroses of the respiratory system. In hysteria tachypnea is manifested by the increase in the number of breaths to 100 and more than 1 min and resembles a "dog breath". Tachypnoea may be seen by some poisoning from exposure on the respiratory center non-completely oxidized products of metabolism, pain in the chest and abdominal cavity, limiting respiratory movements. Tachypnea is also observed when the temperature of the body.