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Variations With Age and Atherosclerotic State

Hubert Mamo, MD, PhD; Philippe Meric, PhD; Albert Luft, MD; Jacques Seylaz, PhD

Arch Neurol. 1983;40(10):626-632.

Abstract
• The phenomenon of relative hyperperfusion of the frontal areas of the cerebral cortex (hyperfrontal flow distribution) was analyzed in 84 patients between 13 and 78 years of age. Fifty-two patients (group 1) had histories of vascular disease or vascular risk factors, and 32 (group 2) did not. Regional cerebral blood flow was measured by an atraumatic xenon Xe 133 method. The mean hemispheric gray-matter flow was found to decrease similarly with age in the two groups. Other findings were as follows: (1) the level of flow within the frontal region was not homogeneous in young adults; (2) in group 1, the frontal hyperperfusion decreased progressively with age, disappearing during the fifth and sixth decades according to a specific topographic pattern; (3) in group 2, hyperperfusion persisted into old age; and (4) hyperperfusion appeared more persistent with age in women than in men.

Author Affiliations
From the Département d'Explorations Fonctionelles du Systéme Nerveux, Hôpital Lariboisière, Paris; the Faculté de Médecine Lariboisiére-Saint-Louis, Université Paris VII (Drs Mamo and Luft); and the Groupe de Recherches de Physiologie et de Physiopathologie Cérébrovasculaire (Unité de Recherches 182, Institut National de la Santé et de la Recherche Médicale [Dr Meric] and Equipe de Recherches Associée 361, Centre National de la Recherche Scientifique [Dr Seylaz]).

Footnotes
Accepted for publication Jan 10, 1983.

Reprint requests to Faculté de Médecine Lariboisiére-Saint-Louis, 10 Ave de Verdun, 75010 Paris, France (Dr Mamo).

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