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Abstract: Regional cerebral blood flow and cognitive deficits in chronic lyme disease

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J Neuropsychiatry Clin Neurosci. 2003 Summer;15(3):326-32.  Fallon BA, Keilp J, Prohovnik I, Heertum RV, Mann JJ.  The NYS Psychiatric Institute, New York, New York 10032, USA.

This study examined brain functioning in patients with Lyme encephalopathy. Eleven patients underwent neuropsychological tests and Xenon(133)-regional cerebral blood flow (rCBF) studies, using an external detector system. Each rCBF scan was age- and sex-matched to two archival, normal controls. While few differences were noted on gray-matter flow indices (ISI, fg), Lyme patients demonstrated significant flow reductions in white matter index (k(2)) (p=.004), particularly in the posterior temporal and parietal lobes bilaterally (p=.003). Flow reductions in white matter areas were significantly associated with deficits in memory (r=.66, p=.027) and visuospatial organization (r=.62, p=.041). Results suggest that Lyme encephalopathy may be a disease primarily affecting the cerebral white matter.

PMID: 12928508 [PubMed – in process]

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