The Comparison of Electroencephalography Power Spectrum Between Patients with Irritable Bowel Syndrome and Healthy People

The aim of this study was to compare the power of ongoing oscillatory activity by using electroencephalography (EEG) between patients with IBS and healthy individuals. The present study was a basic-applied research and regarding the comparison of variables between IBS and healthy group, the study was designed as casual-comparative. The statistical population included patients with IBS who were referred to digestive clinic of Shariati hospital and Masoud digestive clinic in Tehran from 2015-2019. 11 IBS patients (7 female and 4 male) and 11 healthy (7 female and 4 male), gender and age-matched, were selected and brain oscillations were recorded by a 64-channel EEG at rest in eye-closed condition. Oscillations were analyzed by fast Fourier transform and independent t test. The results of power spectrum analysis showed that the IBS patients had augmented theta (4-8 Hz) power in all channels (p<0/05). Increased theta power in IBS patients may contribute to chronic pain or represent the outcome of symptoms.