Conclusions Sleep disorders constitute a ubiquitous group of dise

Conclusions Sleep disorders constitute a ubiquitous group of diseases

that have important consequences for individual health as well as economic costs to society. The diagnosis of sleep disorders requires careful history taking, #click here randurls[1|1|,|CHEM1|]# examination , and laboratory testing. Although general guidelines in management for the more common and important sleep disorders have been discussed, treatment needs to be tailored to the individual patient. Selected abbreviations and acronyms AHI apnea-hypopnea index BIPAP bilevel positive airway pressure Inhibitors,research,lifescience,medical CPAP continuous positive airway pressure EDS excessive daytime somnolence EMG electrornyograrn EOG electro-oculogram MSLT mean sleep latency Inhibitors,research,lifescience,medical test MWT maintenance

of wakefulness test NPT nocturnal penile tumescence NREM non-rapid eye movement OSAS obstructive sleep apnea syndrome PLMD periodic limb movement disorder PMR progressive muscle relaxation PSG polysomnogram RBD REM behavior sleep disorder RDI respiratory disturbance index REM rapid eye movement RLS restless legs syndrome SOL sleep-onset latency SWS slow-wave sleep UARS upper airway resistance syndrome WASO wake after sleep onset
In order for Dialogues in Clinical Neuroscience to be truly designated “dialogues,” Inhibitors,research,lifescience,medical I will raise specific and critical questions about the putative circadian rhythm disturbances in depression, provide a model within which to understand them, and summarize the present status and application of chronobiological therapies. This

short overview will not go into detail of the clinical and experimental findings related to biological rhythms in depression, which Inhibitors,research,lifescience,medical Inhibitors,research,lifescience,medical have been extensively reviewed elsewhere.1-9 Chronobiologists predicate their work on a primary axiom, that temporal order is essential for health. Psychological, behavioral, physiological, and hormonal rhythms are specifically and functionally timed (entrained or synchronized) with respect to sleep and the day-night cycle. The converse premise implies that temporal disorder must have clinical correlates. Rhythmic characteristics found of mood disorders were precisely described as far back as ancient times. However, it is still unclear whether circadian rhythms are reliably linked with psychopathology, if they provide clues to underlying mechanisms, and how they can be understood with respect to the established neurotransmitter models of depression. The first question is common to all clinical research: what do we mean by biologically homogeneous groups? Here too, diagnostic issues are the crux. In addition to the distinction unipolar, bipolar, or seasonal affective disorder (SAD), the stage of the illness may be important for chronobiological disturbances.

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