[Motion sickness in the aerospace environment].

After a brief description of the newest and special form of motion sickness known as "space sickness" arising in space flight, and the various hypotheses on its aetiopathogenesis, motion sickness in general and the air or plane sickness deriving from atmospheric flying are discussed. The aetiopathogenesis of air sickness derives from abnormal stimulations that are primarily vestibular but also visual and somesthesic, and generated by irregular movements or variations in attitude of the plane. Reflex action than produces effects that are primarily neurovegetative (nausea, vomiting, pallor, scialorrhea, sweating, bradycardia) and neuropsychological (depression, drowsiness, headache, discomfort and general debility with altered cenesthesia). After a description of the symptoms, the prevention and treatment of air sickness are discussed.