Journal of Sleep Sciences 2018-09-01T12:02:00+0430 Dr. Khosro Sadeghniiat-Haghighi Open Journal Systems <p>The “Journal of Sleep sciences (JSS) “<strong>(<span style="text-decoration: underline;">رتبه علمی- پژوهشی) </span></strong>is the official scientific quarterly publication affiliated with Occupational Sleep Research Center (OSRC) of Tehran University of Medical Sciences. JSS is also official journal of Iranian Sleep Medicine Society. The main goals of journal are to improve the knowledge and awareness of clinicians and research professionals about the latest findings in prevention, diagnosis, treatment and etiology of sleep disorders. We would be very delighted to receive your Original Papers, Review Articles, Short communications, Case reports and Scientific Letters to the Editor on the all areas of sleep sciences. </p> Sleep and Cognition in Schizophrenia 2018-08-20T11:39:39+0430 Parisa Adimi Naghan Javad Setareh <p><strong>Background and Objective:</strong> Schizophrenia (SCZ) affects both genders with similar rates. It usually appears in the second to the third decades of one’s life. Schizophrenia is marked by a wide spectrum of symptoms, which functionally impair patients. The symptoms are categorized as positive, negative, or cognitive deficits. Among them, cognitive disturbance is highly valued. However, the relationship between sleep and cognition in patients with schizophrenia has been less widely considered. In this study, we aimed to review the relationship between sleep and cognition in patients with schizophrenia.</p><p><strong>Materials and Methods:</strong> We considered selected key words (e.g. Cognition, Schizophrenia, and Sleep), and searched the online databases at the first step with defined time window of 2010 to the present; while at the second step, the incomplete knowledge was completed from 1990 to 2010. Among them, articles related to our research objectives were selected for further review.</p><p><strong> Results:</strong> Cognitive functions including memory, attention, reasoning, decision-making, and many other elements are tightly related to quality of sleep. Moreover, sleep deficit exacerbate the symptoms of schizophrenia. It is known that cognitive function is dependent on certain activities in brain that occur during sleep. A body of research has indicated that the slow wave sleep, rapid eye movement (REM) sleep, K-complex, and also sleep spindle are at least partly explained by these functions.</p><p><strong> Conclusion:</strong> In the light of these findings, study of brain activity via electroencephalogram (EEG) during sleep is a reasonable objective method for assessment of sleep-related cognitive markers in patients with schizophrenia. </p> 2018-08-04T04:58:48+0430 ##submission.copyrightStatement## Polysomnography Report for a Boy with TBC1D24 Mutation 2018-09-01T12:02:00+0430 Khatereh Khamenehpour Shabnam Jalilolghadr <p><strong>Background and Objective:</strong> Advances in molecular genetics technology has improved current understanding of the genetic causes of the rare neurological disorders with hyper-somnolence and seizure.</p><p><strong>Case Report</strong>: An 11-year-old boy with attacks of sleepiness and hypotonicity for about 45 minutes and neurodevelopmental delay was referred to a sleep laboratory for polysomnography to rule out narcolepsy. In genetic analysis, he had mutation in the TBC1D24 gene. This mutation was heterozygous in the pair, and family members were not affected.</p><p><strong> Conclusion:</strong> This report suggests that TBC1D24-related diseases should be considered in differential diagnosis of children with sleep attacks and seizure.</p> 2018-08-04T04:58:48+0430 ##submission.copyrightStatement## The Relationship between Morning-Evening Types and Mental Health Using a Canonical Correlation Analysis 2018-09-01T11:37:50+0430 Tayebe Rahimi Pordanjani Ali Mohamadzade Ebrahimi <p><strong>Background and Objective:</strong> The optimal method of predicting mental health is the investigation of individual differences, such as identification of morning-evening types. The present study examined the relationship between components of morning-evening types, using the four components of mental health, in a group of students.</p><p><strong>Materials and Methods:</strong> The population of this descriptive cross-sectional study was all undergraduate students at the University of Bojnord, Bojnord, Iran. The participants (N = 341) were selected from this population via stratified random sampling, and they were evaluated using the Composite Scale of Morningness (CSM) and the General Health Questionnaire-28 (GHQ-28). To analyze the data, the Pearson correlation coefficient and canonical correlation analysis (CCA) were applied.</p><p><strong> Results:</strong> The canonical redundancy analysis showed that the first canonical function was statistically significant  (R2 = 0.205, P &lt; 0.0001). The canonical weights showed that the order of contribution of independent variables to the first variate was morning affect (-0.921) and activity planning (-0.162), and the order of contribution of dependent variables was anxiety/insomnia (0.488), severe depression (0.350), somatic symptoms (0.198), and social dysfunction (0.179).</p><p><strong> Conclusion:</strong> This study showed the importance of morning-evening types as the predictor of mental health and its dimensions. Therefore, it is recommended that the morningness-eveningness preferences of people be considered in clinical interviews and diagnosis. </p> 2018-08-04T04:58:47+0430 ##submission.copyrightStatement## Continuous Positive Airway Pressure Adherence in Patients with Obstructive Sleep Apnea Syndrome 2018-09-01T11:44:35+0430 Arezu Najafi Nafiseh Naeimabadi Khosro Sadeghniiat-Haghighi Mojahedeh Salmani-Nodoushan Ania Rahimi-Golkhandan <p><strong>Background and Objective:</strong> Obstructive sleep apnea syndrome (OSAS) is a common sleep disorder with serious consequences. The best treatment for moderate to severe OSA is continuous positive airway pressure (CPAP), and is associated with reduced OSA-related adverse consequences. However, poor adherence to CPAP is still an important issue in these patients. This study aimed to evaluate CPAP adherence, and predisposing factors for poor adherence.</p><p><strong>Materials and Methods:</strong> In this longitudinal study, 120 patients with confirmed OSAS who underwent positive airway pressure titration study were enrolled. After at least six months of CPAP therapy, the subjects were evaluated for CPAP adherence.</p><p><strong> Results:</strong> Of 120 participants, 40 (33.3%) used CPAP device for at least 4 hours per night in 70% of nights after at least 6 months of prescription (compliant subjects). Older age was associated with more CPAP adherence (54.3 ± 11.3 vs. 49.3 ± 12.0, P = 0.037). Patients with higher prescribed device pressure were less likely to use CPAP regularly  (8.7 ± 5.4 vs. 24.3 ± 44.2, P = 0.049). Difficult breathing and discomfort with full-face mask were the most common reported problems by compliant patients.</p><p><strong> Conclusion:</strong> Poor adherence to CPAP therapy is a serious issue in patients with OSAS. Older age and lower CPAPdevice pressure were associated with favorable adherence. More interventions should be evaluated for improving acceptance and adherence of CPAP therapy among the patients with OSAS. </p> 2018-08-04T04:58:47+0430 ##submission.copyrightStatement## Mood and Psychological State in Patients with Obstructive Sleep Apnea (OSA) Referring to Sleep Laboratory 2018-09-01T11:53:12+0430 Zahra Banafsheh Alemohammad Omid Aminian Anoosheh Noorani Khosro Sadeghniiat-Haghighi Sahar Eftekhari <p><strong>Background and Objective:</strong> Obstructive sleep apnea (OSA) is associated with increased sympathetic activity, sleepiness, mood, and psychological alterations. In this study, mood and psychological state of patients referring to sleep laboratory were assessed.</p><p><strong> Materials and Methods:</strong> Fifty-eight consecutive individuals eligible for participation in the study were assigned to one of two groups of normal and mild (n = 19), or moderate to severe OSA (n = 39) with apnea-hypopnea index (AHI) of ≤ 15, or &gt; 15 per hour, respectively, based on their initial polysomnography. The mood status was evaluated using the profile of mood states (POMS).</p><p><strong> Results:</strong> Amongst the six POMS subscales, only power-energy was significantly different between the two groups (P = 0.03). The total score of POMS, however, did not differ across the groups (P = 0.58).</p><p><strong> Conclusion:</strong> According to the obtained results, it may be concluded that mood status and OSA are not related when POMS is used for evaluation of mood status</p> 2018-08-04T04:58:47+0430 ##submission.copyrightStatement##