British Medical Bulletin 42:106-110 (1986)
© 1986 The British Council
research-article |
THE SECONDARY DEMENTIAS OF MIDDLE AND LATER LIFE
Department of Psychiatry, University of New South Wales
Abstract
While, in both the so-called presenile and senile periods of life, Alzheimer's disease is unquestionably the commonest cause of dementieat least in western communitiesit is justifiable, if not obligatory, to carry out full investigation of each case when this diagnosis is made. This applies to any age although it has to be accepted that the law of diminishing returns applies. Investigations are not executed simply for heuristic reasons but because some of these patients are found to be suffering from treatable conditions, and some prove not be dementod at all. The less common conditions provide evidence that, although the contribution of pathological changes in the cerebral cortex to the sympatomatology of demential can never be ignored, lesions elsewhere in the brain may be equally or more important.