Kostić, V.S. (35239923400)V.S. (35239923400)KostićŠušić, V. (7003269321)V. (7003269321)ŠušićČovičković-Šternić, N. (6603691178)N. (6603691178)Čovičković-ŠternićMarinković, Z. (7003877409)Z. (7003877409)MarinkovićJanković, S. (54914106800)S. (54914106800)Janković2025-06-122025-06-121989https://doi.org/10.1007/BF00314903https://www.scopus.com/inward/record.uri?eid=2-s2.0-0024444481&doi=10.1007%2fBF00314903&partnerID=40&md5=6c4e4163f5ac5c76fa112b0075cbe80ahttps://remedy.med.bg.ac.rs/handle/123456789/1959Rapid eye movement (REM) sleep latency (time from sleep onset to the first REM episode) was measured in 39 patients with idiopathic Parkinson's disease. Reduced REM sleep latency (≤65.0 min) was found in a high proportion of patients (69%). Since reduced REM sleep latency may be a trait-like abnormality relatively specific to primary depression, we evaluated this parameter in two groups of parkinsonian patients: depressed (16 patients) and non-depressed (23 patients). Its incidence was significantly higher in depressed patients with Parkinson's disease. © 1989 Springer-Verlag.Parkinson's diseaseRapid eye movement sleep latency