Bright light therapy in schizophrenic diseases

20 patients with schizophrenic disorders, displaying a depressive syndrome, were given bright-light therapy, and compared with 11 patients treated by means of partial deprivation of sleep. Against a figure of 27% in the case of sleep-deprivation, syndrome remittance was 55% in the case of bright-light therapy. Psychometric data were obtained by use of three external-assessment schemes (HAMD, BPRS, and NOSIE) and two self-assessment procedures (TSD, POMS). As depressive syndromes improve under bright-light therapy, schizophrenic symptoms also recede, which suggests close syndromatologic links in the sense of a universal genesis of psychoses.