Young Chan Lim's research while affiliated with Kangwon National University Hospital and other places
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Publications (3)
Objective
We aimed to compare the sleep onset, dim melatonin onset (DLMO) and phase angle (PA) between sleep onset and DLMO of insomnia patients with those of controls, and to examine the difference in these parameters in relation to objective sleep quality.
Methods
Participants were recruited from three Public Health Centers in Korea. Actigraphy...
The relevance of altered rest-activity rhythm (RAR) and light exposure rhythm (LER) in insomnia patients under natural conditions remains unclear. The aim of this study was to compare the parametric and nonparametric circadian variables of RAR and those of LER under natural conditions between insomnia patients and normal controls (NC) in a communit...
Citations
... ight melatonin onset. Typically, good sleepers attempt sleep about 2 h after their DLMO and have short sleep latencies. The insomnia participants attempting sleep at an abnormally early circadian phase had exceptionally longer sleep latencies. They suggested that these insomnia participants were attempting sleep within their wake-maintenance zones.Kim et al. (2020) have also shown a relation between the timing of DLMO and sleep maintenance problems. The earlier the dim light melatonin onset, the more wake time was experienced after initial sleep onset. ...
... While van Veen et al. (2010) reported an attenuated 24 h amplitude of the rest-activity pattern and lower interdaily stability of adults with insomnia comorbid with ADHD, no differences in inter-or intradaily rhythm variables were found in children with ADHD and insomnia (van der Heijden et al., 2005). The few other studies published on diurnal rhythm variables in insomnia also failed to find differences between patients and controls (Kim, Lim, Kwon, & Lee, 2020;Natale et al., 2009), with the actual numbers of null results possibly being much larger due to the file drawer problem (Rosenthal, 1979). ...
... In this study, the KESS scores of the NC were significantly higher than those of insomnia group without exercise (Table 3). Although it may be expected that daytime sleepiness will occur to compensate for sleep deprivation in insomnia patients, it has been reported that daytime sleepiness may decrease due to the disrupted sleep homeostasis [39]. In this study, the degree of hyper-arousal indicated by the HAS was observed to be higher in the insomnia group than the NC group, although the difference was not statistically significant. ...
