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Judith M. Rumsey, PhD; Robert Dorwart, MD; Michael Vermess, MD; Martha B. Denckla, MD; Markus J. P. Kruesi, MD; Judith L. Rapoport, MD

Arch Neurol. 1986;43(10):1045-1046.

Abstract
• The brain anatomy of ten men (aged 18 to 28 years) with persistent, severe developmental dyslexia was examined with magnetic resonance imaging to explore the possibility of visualizing pathology not seen in previous computed tomographic scan studies. Nine of the ten examinations were clinically normal. One showed a focal finding thought to be incidental to dyslexia. The volume of the temporal lobes was judged to be symmetrical in nine of ten examinations, a finding supportive of previous computed tomographic scan and neuropathologic reports of unusual symmetries of posterior brain regions. Thus, despite its sensitivity, magnetic resonance imaging failed to identify a common focal pathology. The choice of imaging planes (particularly coronal) and lack of bone artifact may, however, prove useful for studying macroscopic asymmetries in dyslexia.

Author Affiliations
From the Child Psychiatry Branch, National Institute of Mental Health (Drs Rumsey, Kruesi, and Rapoport), the Department of Radiology, Clinical Center, National Institutes of Health (Drs Dorwart and Vermess), and the Developmental Neurology Branch, National Institute of Neurological and Communicative Disorders and Stroke (Dr Denckla), Bethesda, Md.

Footnotes
Accepted for publication July 21, 1986.

Reprint requests to Child Psychiatry Branch, National Institute of Mental Health, Bldg 10, Room 6N240, Bethesda, MD 20892 (Dr Rumsey).

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