Physiological reactivity to stressors in irritable bowel syndrome patients, inflammatory bowel disease patients and non-patient controls.

Irritable Bowel Syndrome (IBS) patients were compared with Inflammatory Bowel Disease (IBD) patients and non-patient controls on four separate physiological measures (heart rate, finger-tip temperature, skin resistance level, and forehead EMG) for their physical reactivity to 'laboratory stressors'. It was predicted that the IBS patients would respond to these stressors with more physiological reactivity than the two other groups. There were initial basal differences among the groups on heart rate and finger-tip temperature: in general, the IBS patients had lower basal heart rates and the non-patient controls had lower finger-tip temperatures. These findings are contrary to the previous body of literature regarding possible sympathetic nervous system (SNS) arousal states in the IBS patient. The results also indicated IBS patients were not significantly different than the IBD patients or the non-patient controls in their reactivity to stressors. Previous literature has suggested that IBS in their reactivity to stressors. Previous literature has suggested that IBS patients have an enhanced SNS arousal or an SNS mediated reactivity to environmental stressors, our current study has not found these results.