title: Motion sickness and sopite syndrome associated with parabolic flights: a case report.
abstract: OBJECTIVE
  The purpose of this paper was to provide an extensive description of a case of sopite syndrome, a manifestation of motion sickness scarcely described in the literature.
  
  
  METHODS
  The following questionnaires were used to assess sopite syndrome symptoms pre, during and post parabolic flight; Misery Scale rate, Positive and Negative Affect Scale, the Motion Sickness Assessment Questionnaire and the Epworth Sleepiness Scale.
  
  
  METHODS
  Case report of a 35-year old female compared to a control group (n = 26).
  
  
  RESULTS
  We describe of sopite syndrome during parabolic flight. The subject reported drowsiness and she noted mood changes such as irritation and annoyance. Furthermore, she was not able to perform her assigned task. Her symptoms escalated into extreme fatigue and the inability to stay awake. Nauseogenic symptoms improved, but soporific symptoms persisted for several hours after the motion stimulus (i.e. parabolic flight).
  
  
  CONCLUSIONS
  This case points towards the need for controlled studies to assess the prevalence of this syndrome among the general population and select groups. Future research should focus on developing tests for personnel screening and explore treatment options.
authors.affiliation: a Antwerp University Research Centre for Equilibrium and Aerospace (AUREA), University of Antwerp Groenenborgerlaan , Antwerp , 171, 2020 , Belgium and.
authors.forename: Angelique
authors.initials: A
authors.lastname: Van Ombergen
authors.affiliation: b U.S. Army Aeromedical Research Laboratory , Fort Rucker , Alabama , 36362 , U.S.A.
authors.forename: Ben D
authors.initials: BD
authors.lastname: Lawson
authors.affiliation: a Antwerp University Research Centre for Equilibrium and Aerospace (AUREA), University of Antwerp Groenenborgerlaan , Antwerp , 171, 2020 , Belgium and.
authors.forename: Floris L
authors.initials: FL
authors.lastname: Wuyts
mesh_terms: D000328:Adult; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D008297:Male; D018489:Space Motion Sickness
keywords: Motion sickness; parabolic flight; sopite syndrome; vestibular system