EEG alterations in subjects at high familial risk for Alzheimer's disease.

Twenty first-order relatives of patients with early-onset Alzheimer's disease (AD; mean age 43.7 +/- 1.3 years), 20 patients with early-onset AD (mean age 65.

Possible neurophysiological markers of genetic predisposition to Alzheimer's disease.

Visual-evoked potentials (VEP) to a flash were studied in the first-order relatives of patients with Alzheimer's disease (AD) (mean age 38.2 +/- 2.6 years) in comparison with the patients (mean age 61.