This study could contribute to understanding the aggravation of balance disorders and the increased risk of falling in depressive people. It could, among other things, shed light on the impact of treatments with antidepressants on balance in treated depressive patients. Finally, it could contribute to improving the sensory-motor management of patients with a depressive syndrome.

Inclusion Criteria:

In the 2 groups:

• General and cognitive status allowing the patient, according to the evaluation of the investigators, to take part in the study.
• Patients who provide written informed consent
• Patients covered by the national health insurance agency

In the "depression " group:

• Age ≥ 75 years,
• Subjects with a depressive syndrome, according to Geriatric Depression Scale criteria.
• Patients without treatment with antidepressants

In the "control" group:

• Age ≥ 75 years,
• Absence of a depressive syndrome

Exclusion Criteria:

In the 2 groups:

• Presence of a disabling orthopedic disease,
• Presence of any chronic neurological disease (cerebrovascular accident, Parkinson's syndrome …),
• Presence of a psychiatric disease apart from depression in the " depression " group
• Presence of a vestibular disease with clinical manifestations,
• Presence of a non-corrected visual disorder,
• Existence of a progressive organ disease,
• Psychotropic treatment able to impair vigilance and posture,
• Notion of one or several falls in the preceding 6 months,
• Oppositional personality or low motivation,
• Emotional or intellectual disorder.
• Patients under guardianship
• Patients who have taken part in a therapeutic trial in the previous 30 days