The<unk>  has been associated with visually-induced and vestibular motion sickness. Other factors associated with drowsiness such as darkness or physical fatigue may intensify the effects of motion-induced sleepiness. The<unk>  may occur with little motional stimulus (though the greatest effects tend to be observed in subjects who have been exposed for longer periods of time), and often persists for a time after the motional stimulus has ceased. Susceptibility A study of certain aspects of motion sickness among medical transport attendants showed that the onset of the<unk>  is likely to occur independently of the mode of transportation; little difference was observed in the frequency of<unk>  symptoms for ground transport compared to air transport. Also, the length of time exposed to vehicular motion did not appear to affect the occurrence (or lack thereof) or severity of the<unk> . No difference was observed in the incidence of the<unk>  for men versus women. The<unk>  is likely a cumulative disorder. For instance, when a subject has the flu, a hangover may exacerbate the symptoms of the illness. A subject normally resistant to motion sickness may experience symptoms of motion sickness when also experiencing flu-like (or hangover-like) symptoms.
Sopite syndrome
Larsen syndrome
Jeavons syndrome
Roemheld syndrome
Dressler syndrome
Feingold syndrome
Reynolds syndrome
Crome syndrome