The Complex Regional Pain Syndrome (CRPS) is a Chronic Pain Condition. This is a Preliminary Study to Explore and Test Clinical Hypothesis. They Suppose That CRPS Patients Have Impairment in Their Mental or Motor Imagery Abilities.

Inclusion criteria

• Patient with French healthcare affiliation
• Adult patient (> 18 years old)
• Patient with bachelor degree minimum
• Patient practicing less than 150 minutes of moderate to intense physical activity per week

Specific Inclusion Criteria for CRPS group :

• Patient followed in the Evaluation and Treatment pain center (University Hospital of Nimes)
• Patient with secondary CRPS due to a traumatism or a surgery

Specific Inclusion Criteria for Musculoskeletal group :

• Patient with musculoskelettal disorder on a limb (upper or lower)
• Patient followed in the University Hospital of Nimes

Non inclusion Criteria :

• Patient who participates in another category 1 research
• Patient in a exclusion period in another study
• Patient under legal protection, under guardianship or under curatorship
• Patient for whom it is impossible to give clear information.
• Pregnant, parturient or breastfeeding patient.
• Patient with amputation on one of his limb
• Patient with visual cecity
• Patient who has already practiced mental imagery
• Patient with neurological impairment
• Patient with chronic low back pain and fibromyalgia

Specific non inclusion criteria for Musculoskeletal group and healthy group :

-Patient with CRPS

Specific non inclusion Criteria for CRPS group :

• Secondary CRPS to CVA (cerebrovascular accident)
• Patient receiving lymph node block treatment between the inclusion visit and the follow-up visit

Specific non inclusion Criteria for Musculoskeletal Disorder group :

• Patient with secondary musculoskeletal disorder to a CVA

Exclusion criteria

• Questionnaire MIQ-RS not completed or non respect with the research protocol
• pathology discovered incompatible with the study criteria