The study aims at showing that the susceptibility in the stress is more raised at the person affected digestive pathologies (SII or IBD) in forgiveness than healthy subjects.

The objective of the study which we wish to lead consists in looking for, at the patients SII and IBD in forgiveness, the existence of a correlation between the rate of cortisol(Hormone of the stress) and the level of HRV (Heart Rate Variability) to estimate the inhibitive fronto-amygdalien tonus.

So we make the hypothesis that the persons affected by digestive pathologies of type SII or IBD would present an emotional and physiological vulnerability more important than unhurt subjects of pathologies.

Inclusion Criteria:

• Patients with SII :Membership to the Social Security,SII defined according to the criteria Rome III.
• Patients with IBD :Membership to the Social Security,patients with a ulcerative colitis(UC) or a Crohn's disease (CD)ileal and/or colic.

Exclusion Criteria:

• Existence of a severe affectation on the general plan (cardiac,respiratory,hematological,renal,hepatic,cancerous),
• Subject diabetic,
• Pregnant or breast-feeding woman,
• Subject included in another clinical and\or therapeutic trial or having been included in a clinical and\or therapeutic trial for less than a month,
• Subject presenting a psychiatric pathology evident,
• Person under guardianship.