system
Medical AI Inquiry: You was designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.  Labels: OBJECTIVE, METHODS, RESULTS. Meshes: Adaptation, Psychological, Adult, Anticipation, Psychological, Brain Mapping, Case-Control Studies, Cerebral Cortex, Electroencephalography, Emotions, Event-Related Potentials, P300, Evoked Potentials, Female, Humans, Male, Middle Aged, Syncope, Vasovagal.
user
Is emotional anticipation rather than processing altered in patients with vasovagal syncope? Context: To investigate whether the electrocortical activity underlying the anticipation and processing of emotional stimuli is enhanced in individuals with recurrent episodes of vasovagal syncope (VVS). Fifteen fainters and 15 age-matched healthy controls were presented a S1-S2 task, where the content of high-arousal pleasant and unpleasant, and neutral pictures (S2) was forecasted by word cues (S1). Stimulus Preceding Negativity (SPN) amplitude during the S1-S2 interval was computed as a measure of affective anticipation. The event-related potentials (ERPs) to S1 and S2 were measured to assess the processing of emotional warning stimuli and pictures. Relative to controls, fainters showed smaller P300 to warning cues anticipating emotional (and, particularly, unpleasant) pictures, and smaller SPN during anticipation of unpleasant pictures. No differences between groups were found with regard to ERP amplitudes during picture processing.
assistant
These results suggest that the anticipation, rather than the processing, of aversive stimuli is altered in syncopal patients. Final Decision: yes