Study of the Effect of a Cognitive Task on Static Balance in Depressive Elderly Subjects According to the Double Task Principle

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