Université De Picardie Jules Verne

This study investigates how the anticipation of pain affects muscle synergies. Two groups will be compared: an experimental group, who first experience actual pain from capsaicin cream and are then presented with a harmless cream deceptively labeled as capsaicin, against a control group, who are presented with a harmless cream labeled as potentially painful, without any prior painful experience. The changes in muscle synergies will be measured during walking tasks.

The purpose of this study is to determine whether the anticipation of pain influences gait control and psychophysiological responses in healthy individuals. Participants will receive a neutral cream described either as potentially painful (experimental group) or inert (control group), and their behavioral and physiological adaptations will be measured during walking tasks.

The goal of this observational study is to compare the postural response to the mental simulation of everyday situations identified as painful in participants with non-specific low back pain and healthy volunteers.
The main questions it aims to answer are :
Do participants with low-back pain show reduced variability in center of pressure displacements compared with non-painful participants when faced with mental simulation of everyday situations identified as painful? Is the postural response correlated with the level of kinesiophobia? Participants will be faced to pictures of everyday situations identified as painful while several physiological measurements (posturography, electromyography, heart rate) are being recorded.