Twenty-four subjects with cerebral lesions, 21 of vascular and 3 of neoplastic origin, have been tested by the Authors with a battery of tests for memory evaluation. They comprehended short term, middle term and long term memory tests. For the last ones, the subjects was requested to recall remote events presented under visual, verbal and auditory modality. For each test, results comparison between left and right hemispheric cerebral damaged patients was performed. The diagnosis of the hemispherical localisation, on the basis of clinical data established, have been confirmed by instrumental exams (EEG, CAT, Angiography). A clear difference in the results between the two groups of patients does not appear except in specific tests related to memory selective types, in which the sensitive modality of tests administration seems to be more closely in relation with the damaged hemispherical functions. Ribot's law on the longer life of old memories has not been confirmed by the long term memory tests in cerebral damaged patients.