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BACKGROUND A limited number of attempts have been made to develop a questionnaire that assesses the experience of motion sickness. Further, many available questionnaires quantify motion sickness as a unidimensional construct. METHOD Exploratory and confirmatory factor analyses of motion sickness descriptors were used to derive and verify four dimensions(More)
We measured gastric emptying and gastric myoelectrical activity with solid-phase gastric-emptying tests and cutaneously recorded electrogastrograms (EGGs), respectively, in six insulin-dependent diabetic patients with nausea and vomiting who did not respond to standard treatments. Baseline solid phase gastric emptying was markedly delayed (78 +/- 8%(More)
Fifty-two subjects were exposed to a rotating optokinetic drum. Ten of these subjects who became motion sick during the first session completed two additional sessions. Subjects' symptoms of motion sickness, perception of self-motion, electrogastrograms (EGGs), heart rate, mean successive differences of R-R intervals (RRI), and skin conductance were(More)
Nausea, unlike emesis, is a subjective experience that is difficult to describe to others, be they clinicians or researchers. Previous research has been limited to examining the frequency, severity, and duration of nausea. The goal of this study was to design a questionnaire that would allow for the evaluation of the characteristics of nausea across(More)
Propoxyphene (P) and norpropoxyphene (NP) excretion in breast milk was studied in six healthy nursing mothers. Concentrations of P and NP in breast milk and plasma were quantitated by an HPLC method. Plasma P t 1/2 s in mothers averaged 4.40 hr. P and NP breast milk concentrations generally followed plasma levels. NP/P averaged 2.69 in plasma and 2.73 in(More)
Many adverse effects commonly associated with chemotherapy, such as nausea, vomiting, and fatigue, are also characteristic of adrenal insufficiency. It is conceivable that chemotherapy drugs may directly or indirectly impact the activity of the hypothalamic-pituitary-adrenal axis. We examined this conjecture by characterizing temporal changes in blood(More)
Motion sickness symptoms and electrogastrograms (EGGs) were obtained from 60 healthy subjects while they viewed an optokinetic drum rotated at one of four speeds: 15, 30, 60 or 90 degrees.s-1. All subjects experienced vection, illusory self-motion. Motion sickness symptoms increased as drum speed increased up to 60 degrees.s-1; i.e., symptoms decreased at(More)
The physiology of nausea, a uniquely human symptom, is poorly understood. The purpose of this study was to measure the temporal sequences of neurohormonal responses and gastric myoelectrical activity in healthy subjects during the rotation of an optokinetic drum that produced nausea and other symptoms of motion sickness. Plasma catecholamines, vasopressin,(More)
This study investigated the effect of food ingestion on motion sickness severity and its physiological mechanisms. Forty-six fasted subjects were assigned either to a meal group or to a no-meal group. Electrogastrographic (EGG) indices (normal 3 cpm activity and abnormal 4-9 cpm tachyarrhythmia) and respiratory sinus arrhythmia (RSA) were measured before(More)