Study of the Impact of Gastric Interoceptive Signals on the Body Schema Via the Water Load Test II ( GIBS) (GIBS)

The primary endpoint is composite and corresponds to the two differences in SKIN and MOVE scores, measured before and after the gastric interoceptive activation task, which assess the integrity of the body pattern.

• The SKIN score is the average difference (in mm) between the actual deviation applied to the shoulder and belly skin and the estimated deviation reported by the participant.
• MOVE score is the average ratio between the minimum distance (in mm) between virtual balls thrown at a person's shoulders and belly and from which they are avoided, and the actual morphology of this person at the point where the bullets pass (actual body width in mm).