EEG vigilance profile as a supplement of psychiatric data.
A vigilance measurement based on EEG spectra was employed to supplement the clinical data. In an experimental situation when the patient was left undisturbed after a standard stimulation, four typical patterns were observed. Besides the normal profile, a 'somnolent pattern' with pronounced vigilance decrease and an 'unquiet pattern' with high variance could be seen in treated and in untreated schizophrenic patients, respectively. A combination of both characteristics occurred in depressive patients with symptoms such as agitation, tension, and hypochondria. The outcome of treatment was predictable in the patients with a 'mixed pattern', while the drug effect was unpredictable in other patients with the same diagnosis.
D000328:Adult; D000368:Aged; D001143:Arousal / Q000502:physiology*; D003866:Depressive Disorder / Q000503:physiopathology; D004569:Electroencephalography; D006801:Humans; D001523:Mental Disorders / Q000503:physiopathology*; D008875:Middle Aged; D019965:Neurocognitive Disorders / Q000503:physiopathology; D010259:Paranoid Disorders / Q000503:physiopathology; D012559:Schizophrenia / Q000503:physiopathology; D012894:Sleep Stages / Q000502:physiology