Changes in auditory P300 in patients with major depression and silent cerebral infarction.
We examined event-related potentials in patients with senile depression and silent cerebral infarction (SCI) to clarify the features of the P300 component. P300 event-related potentials were recorded in drug-free depressed patients (N = 16) and normal controls (N = 17). All patients underwent magnetic resonance imaging and were classified as SCI-positive (N = 7) or SCI-negative (N = 9). In depressed patients, the P300 was reexamined after antidepressant treatment. Prior to treatment, P300 amplitudes in depressed patients were significantly smaller than those in normal controls (P < 0.01). P300 amplitudes increased significantly in SCI-negative patients following recovery (P < 0.05), but did not change in SCI-positive patients. SCI may interrupt the treatment-related P300 amplitude increase in depressed patients.
Yanai
I
I
Department of Psychiatry and Neurosciences, Hiroshima University School of Medicine, Japan.
Fujikawa
T
T
Osada
M
M
Yamawaki
S
S
Touhouda
Y
Y
D000367:Age Factors; D000368:Aged; D000928:Antidepressive Agents / Q000627:therapeutic use; D001921:Brain / Q000473:pathology; D002544:Cerebral Infarction / Q000175:diagnosis* / Q000453:epidemiology / Q000473:pathology; D015897:Comorbidity; D003866:Depressive Disorder / Q000175:diagnosis* / Q000188:drug therapy / Q000453:epidemiology; D018913:Event-Related Potentials, P300; D005072:Evoked Potentials, Auditory; D005260:Female; D006801:Humans; D007564:Japan / Q000453:epidemiology; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies
D000928:Antidepressive Agents