[Depression: an underrated consequence of stroke in elderly].

Stroke is a major cause of morbidity, disability and hospitalization in the elderly. Depression frequently occurs after stroke and influences functional recovery, a crucial factor for the prognosis. The physiopathology of post-stroke depression is not entirely elucidated and might involve several mechanisms: direct consequences of brain lesions, especially in certain localizations, neuroendocrine mechanism or psychological reaction to a life event responsible for stress and handicap.