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P211. Role of perception direction in patients with inflammatory bowel diseases and irritable bowel syndrome

G. Hauser1, M. Tkalcic2, S. Pletikosic2, A. Rubcic2, M. Setic2, D. Domijan2, I. Vukovic1, D. Stimac1

1University Hospital Rijeka, Rijeka, Croatia; 2Faculty of Humanities and Social Sciences, Rijeka, Croatia

Aim: IBD and IBS are chronic intestinal diseases which show similarities in some clinical and psychosocial characteristics. They are both characterised with disturbed bowel motility and abdominal pain. Higher level of intestinal sensation and more sensitiveness to pain and bowel movements are typically connected with IBS. It has been assumed that long lasting gut dysfunction can alter perception of abdominal symptoms and focus perception on abdominal processes. The aim of this study was to test possible differences in global/local perceptual task and visual search task in IBD, IBS patients and healthy control.

Materials and Methods: In the setting of the University Gastroenterology Clinic we included 93 participants:32 IBD (44% women, age range was 18–60, mean age 49.16 years, SD = 12.69), 29 IBS (65% women mean age 41.18 years, SD = 11.22) patients and 32 healthy controls (49% women, mean age 40.16 years, SD = 15.25. Participants underwent computer based testing on two perceptual tasks: global/local perceptual task (Navon, 1977) and visual search task (Naisser, 1967).

Results: Significant interaction (F(2, 90) = 3.19, p < 0.01) between attention (relatively fast processing of local targets) and group (IBD, IBS and control) on reaction time was found. Healthy participants showed faster global than local processing. IBD patients showed faster local than global processing while IBS patients are processing global and local stimulus equally fast. Significant main effect of group (F(2, 90) = 7.25, p < 0.01) on number of visual stimulus for global/local focused attention was found: most errors were done by healthy participants, while minimum errors were done by patients with inflammatory disease. In visual search task, all participants responded faster when target was located in the upper visual field (F(4, 89) = 38.71, p < 0.001). Moreover, significant main effect of group (F(4, 89) = 3.67, p < 0.05) and position of targets (F(4, 89) = 3.76, p < 0.05) on the number of correctly processed stimuli were found: healthy participants were making more mistakes when performing the task compared with the groups of patients. All participants were making more errors when the target was located in the upper visual field.

Conclusions: This research points to difference in focused attention among tested groups; explanation should be sought in visceral hypersensitivity and perception of abdominal symptoms. Difference in gastrointestinal perception and equal focus on global/local stimulus maybe can explain pronounced symptomatology in IBS patients.