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Journal of Geriatric Psychiatry and Neurology
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Cerebral Blood Flow Correlates of Higher Brain Dysfunctions in Corticobasal Degeneration

Bungo Okuda, MD, PhD

Hisao Tachibana, MD, PhD

Keita Kawabata, MD, PhD

Masanaka Takeda, MD, PhD

Minoru Sugita, MD, PhD

To investigate clinicoanatomic correlations of higher brain dysfunctions in corticobasal degeneration, regional cere bral blood flow (rCBF) was semiquantitatively measured with single-photon emission computed tomography in 9 patients with corticobasal degeneration and 12 age-matched control subjects. The patients showed significant reduc tions of relative tracer uptake in widespread cortical areas, as well as the basal ganglia and thalamus. Interhemispheric difference of hypoperfusion was significant in the sensorimotor and posterior parietal cortices. Asymmetric limb apraxia and cortical sensory disturbance corresponded to either sensorimotor cortical or posterior parietal cortical hypoperfusion or both. Compared with the patients without dementia, those with dementia showed significant reductions of relative rCBF in the inferior prefrontal region in the more affected hemisphere. The unique correla tion of cortical signs with regional hypoperfusion may be useful in distinguishing between corticobasal degeneration and other neurodegenerative diseases. (J Geriatr Psychiatry Neurol 1999; 12:189-193).

Journal of Geriatric Psychiatry and Neurology, Vol. 12, No. 4, 189-193 (1999)
DOI: 10.1177/089198879901200404
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