Deficits on self ordered tasks associated with hyperostosis frontalis interna
- aCentre for Magnetic Resonance, bDepartment of Psychology, The University of Queensland 4072, Australia, cDepartment of Medicine, The University of Queensland, Princess Alexandra Hospital, Woolloongabba 4102, Australia, dSmithKline Beecham Pharmaceuticals, Clinical Pharmacology Unit, New Frontiers Science Park, Third Avenue, Harlow, Essex CM19 5AW, UK
- Dr Jonathan B Chalk, Department of Medicine, The University of Queensland, Princess Alexandra Hospital, Woolloongabba 4102, Australia.
- Received 2 January 1997
- Revised 2 April 1997
- Accepted 4 April 1997
Abstract
A 74 year old patient, EW, with dorsolateral frontal cortical compression due to hyperostosis frontalis interna, in the absence of the Morgagni or Stewart-Morel syndromes, is described. In addition to conventional neuropsychological measures EW was administered one non-spatial and two spatial self ordered working memory tasks, as well as a standard measure of fluid intelligence or g. She showed impaired performance on all three self ordered working memory tasks compared with a normal control group of 10 subjects matched for age, education, sex, and IQ. By contrast, her performance on the fluid intelligence test was comparable with that of the controls. It is concluded that the compression of dorsolateral frontal cortex accompanying hyperostosis frontalis interna may produce selective cognitive impairment.
