99mTc-HMPAO regional cerebral blood flow and quantitative electroencephalography in Alzheimer's disease: a correlative study (original) (raw)

In this study the neuropsychological status of patients with Alzheimer's disease (AD) was correlated with quantitative electroencephalography (qEEG) and regional cerebral blood flow (rCBF) both in the cortex and in deep gray matter structures. Forty-three outpatients (mean age 72.4 +/- 7.5 y) with probable AD underwent 99mTc-hexamethyl propyleneamine oxime SPECT with a brain-dedicated gamma camera and qEEG (relative values) within 1 mo. Preliminary factorial analysis with promax rotation identified four qEEG bands (2-5.5, 6-7.5, 8-11.5 and 12-22.5 Hz, with no distinction as to topography) and six SPECT regions (the two thalami together, the two parietal cortices together, the right temporal cortex, the right hippocampus, the left hippocampus and the remaining cortical areas together) as the variables with highest statistical power. All these variables and the Mini-Mental Status Examination score (MMSE, a sensitive marker of neuropsychological deficit) were processed by a final f...