The LOARAL 2 project concerns patients who have undergone total knee arthroplasty to treat symptomatic osteoarthritis. Patient will be divided into three groups: a control group where patients will do standard rehabilitation associated with the judgments of videos represented non-human action and two experimental groups where patients will do standard rehabilitation associated with the judgement of human point-light display. The aim of this study is to measure the benefits of attentional focus and sex correspondence in the use of point-light display for the rehabilitation of patients with a total arthroplasty of the knee.

Inclusion Criteria:

• Volunteers over 18 years of age who have undergone knee surgery

Exclusion Criteria:

• Any locomotor condition not due to knee surgery
• Uncorrected visual disturbances
• Comorbidity altering locomotion (history of stroke, neurological condition, inflammatory rheumatism)

Non randomization criteria:

• Cognitive disorders (Mini Mental State Examination <21)
• Depressive disorders (Beck Inventory index> 9)