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Journal articles on the topic 'Cyclic sleep'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Cui, Jiajia, Zhipei Huang, and Jiankang Wu. "Automatic Detection of the Cyclic Alternating Pattern of Sleep and Diagnosis of Sleep-Related Pathologies Based on Cardiopulmonary Resonance Indices." Sensors 22, no. 6 (2022): 2225. http://dx.doi.org/10.3390/s22062225.

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The cyclic alternating pattern is the periodic electroencephalogram activity occurring during non-rapid eye movement sleep. It is a marker of sleep instability and is correlated with several sleep-related pathologies. Considering the connection between the human heart and brain, our study explores the feasibility of using cardiopulmonary features to automatically detect the cyclic alternating pattern of sleep and hence diagnose sleep-related pathologies. By statistically analyzing and comparing the cardiopulmonary characteristics of a healthy group and groups with sleep-related diseases, an au

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Pracka, Daria, and Tadeusz Pracki. "Spectral analysis in cyclic changes of human sleep evaluation." Acta Neurobiologiae Experimentalis 56, no. 1 (1996): 255–58. http://dx.doi.org/10.55782/ane-1996-1129.

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In this study cyclic changes of human sleep structure were examined. For whole-night polysomnograms of 35 healthy volunteers of both sexes, manual hypnograms were created and divided into NREM-REM cycles. EEG signals from C3–A2 derivation were analysed by computer using a Fast Fourier Transform (FFT). For consecutive NREM-REM cycles of individual sleep stages, EEG power density contents for delta, theta, alpha, sigma and beta waves were analysed. For consecutive sleep cycles, a clear decrease in NREM sleep duration, especially slow wave sleep duration, was obtained. In addition, a decrease in

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Lopes, Maria Cecilia, Agostinho Rosa, Suely Roizenblatt, et al. "Cyclic Alternating Pattern in Peripubertal Children." Sleep 28, no. 2 (2005): 215–19. http://dx.doi.org/10.1093/sleep/28.2.215.

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Misirocchi, Francesco, Carlotta Mutti, Lawrence J. Hirsch, Liborio Parrino, and Irene Florindo. "Cyclic Alternating EEG Patterns: From Sleep to Encephalopathy." Journal of Clinical Neurophysiology 41, no. 6 (2024): 485–94. http://dx.doi.org/10.1097/wnp.0000000000001082.

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Summary: In the 2021 version of the Standardized Critical Care EEG Terminology, the American Clinical Neurophysiology Society introduced new definitions, including for the cyclic alternating pattern of encephalopathy (CAPE). CAPE refers to changes in background EEG activity, with two patterns alternating spontaneously in a regular manner. CAPE shares remarkable similarities with the cyclic alternating pattern, a natural EEG phenomenon occurring in normal non–rapid eye movement sleep, considered the main electrophysiological biomarker of sleep instability. This review explores similarities and

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Hu, Xintian, Liqian Wang, Zhiguo Zhang, and Xue Chen. "Heavy Traffic Feasible Hybrid Intracycle and Cyclic Sleep for Power Saving in 10G-EPON." Scientific World Journal 2014 (2014): 1–13. http://dx.doi.org/10.1155/2014/497379.

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Energy consumption in optical access networks costs carriers substantial operational expense (OPEX) every year and is one of contributing factors for the global warming. To reduce energy consumption in the 10-gigabit Ethernet passive optical network (10G-EPON), a hybrid intracycle and cyclic sleep mechanism is proposed in this paper. Under heavy traffic load, optical network units (ONUs) can utilize short idle slots within each scheduling cycle to enter intracycle sleep without postponing data transmission. In this way, energy conservation is achieved even under heavy traffic load with quality

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6

Zhang, Shi-Qing, Mayumi Kimura, and Shojiro Inoué. "Sleep patterns in cyclic and pseudopregnant rats." Neuroscience Letters 193, no. 2 (1995): 125–28. http://dx.doi.org/10.1016/0304-3940(95)11685-p.

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7

Alves, Arturo, Fábio Mendonça, Sheikh Shanawaz Mostafa, and Fernando Morgado-Dias. "Sleep Analysis by Evaluating the Cyclic Alternating Pattern A Phases." Electronics 13, no. 2 (2024): 333. http://dx.doi.org/10.3390/electronics13020333.

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Sleep is a complex process divided into different stages, and a decrease in sleep quality can lead to adverse health-related effects. Therefore, diagnosing and treating sleep-related conditions is crucial. The Cyclic Alternating Pattern (CAP) is an indicator of sleep instability and can assist in assessing sleep-related disorders such as sleep apnea. However, manually detecting CAP-related events is time-consuming and challenging. Therefore, automatic detection is needed. Despite their usually higher performance, the utilization of deep learning solutions may result in models that lack interpr

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Migueis, Debora, Maria-Cecilia Lopes, Karen Spruyt, and Glenda Lacerda. "0306 Normative Data of Cyclic Alternating Pattern across the Lifespan." Sleep 45, Supplement_1 (2022): A138. http://dx.doi.org/10.1093/sleep/zsac079.304.

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Abstract Introduction Cyclic alternating pattern (CAP) is a marker of sleep instability, and neuroplasticity. Slow wave sleep has been described as a stable period, and CAP can be a marker of funcional delta sleep. The aim of this review was to evaluate the normative data of CAP parameters according to the aging process in healthy subjects. Methods Two authors independently searched databases using PRISMA guidelines through a systematic review and meta-analysis. Subgroup analysis and tests for heterogeneity were conducted. Descriptive statistics were used for the analysis of CAP variables. Met

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Bruni, Oliviero, Raffaele Ferri, Silvia Miano, et al. "Sleep Cyclic Alternating Pattern in Normal Preschool-Aged Children." Sleep 28, no. 2 (2005): 220–32. http://dx.doi.org/10.1093/sleep/28.2.220.

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Ukhinov, E. B., I. M. Madaeva, O. N. Berdina, and L. I. Kolesnikova. "Obstructive Sleep Apnea Syndrome and Features of the Neurophysiological Sleep Pattern." Acta Biomedica Scientifica 6, no. 2 (2021): 16–21. http://dx.doi.org/10.29413/abs.2021-6.2.2.

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The high prevalence of obstructive sleep apnea syndrome (OSA) causes a steady interest in this pathology. In recent years, one of the urgent problems in modern somnology is the assessment of the main mechanisms of neuronal dysfunction during the day and at night in OSA, the ideas about which, to a large extent, remain contradictory and not fully understood. One of the modern methods for assessing neuronal dysfunction during sleep is the study of the sleep microstructure, and for its assessment, the method of analysis of cyclic alternating pattern (CAP), an EEG marker of unstable sleep, is used

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11

Godoy, Luciana, Letícia Soster, Clarissa Bueno, et al. "391 Upper Airway Resistance Syndrome is associated with high Cyclic Alternating Pattern." Sleep 44, Supplement_2 (2021): A155—A156. http://dx.doi.org/10.1093/sleep/zsab072.390.

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Abstract Introduction Upper Airway Resistance Syndrome (UARS) is suspected in individuals with excessive daytime sleepiness, fatigue, and sleep fragmentation associated with increased respiratory effort. UARS can negatively impact daytime function. Conventional polysomnography parameters do not demonstrate significant abnormalities in UARS patients but increase in RERAs and arousal index. Cyclic alternating pattern (CAP) is a periodic electroencephalogram activity of non-REM sleep that expresses a condition of sleep instability. The objective of the study was to compare CAP components between

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Ferri, Raffaele, Oliviero Bruni, Silvia Miano, et al. "The Time Structure of the Cyclic Alternating Pattern During Sleep." Sleep 29, no. 5 (2006): 693–99. http://dx.doi.org/10.1093/sleep/29.5.693.

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13

Conte, Francesca, Serena Malloggi, Oreste De Rosa, et al. "Sleep Continuity, Stability and Cyclic Organization Are Impaired in Insomniacs: A Case–Control Study." International Journal of Environmental Research and Public Health 20, no. 2 (2023): 1240. http://dx.doi.org/10.3390/ijerph20021240.

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The possibility of distinguishing insomniacs from good sleepers based on polysomnography (PSG) remains an open question. While these groups show modest differences in traditional PSG parameters, some studies suggest that finer measures may be more useful. Here we assess differences between good sleepers (GS), poor sleepers (PS) and insomniacs (IN) in classical PSG measures as well as in sleep continuity, stability and cyclic organization. PSG-monitored sleep (two nights) of 17 IN (diagnosed through a standard clinical interview; Pittsburgh Sleep Quality Index (PSQI) > 5, Insomnia Severity I

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Scharf, Martin B., Michael D. McDannold, Nadia T. Zaretsky, Geoffry T. Hux, Donald E. Brannen, and David V. Berkowitz. "Cyclic Alternating Pattern Sequences in Non-Apneic Snorers with and without Nasal Dilation." Ear, Nose & Throat Journal 75, no. 9 (1996): 617–19. http://dx.doi.org/10.1177/014556139607500911.

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A study was conducted to polysomnographically evaluate the effects of external nasal dilation on sleep quality in mild snorers by examining the amount of sleep fragmentation and cyclic alternating pattern sequences (CAPS) rates. A two-night, open-label, one-way crossover Polysomnographic evaluation, with and without use of an external nasal dilator, was done at the Tri-State Sleep Disorders Center in Cincinnati, Ohio. Nine snorers, polysomnographically determined to be free of clinically significant levels of obstructive sleep apnea, were studied. CAPS rates with nasal dilation were 28.4% as c

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Smerieri, Arianna, Liborio Parrino, Matteo Agosti, Raffaele Ferri, and Mario Giovanni Terzano. "Cyclic alternating pattern sequences and non-cyclic alternating pattern periods in human sleep." Clinical Neurophysiology 118, no. 10 (2007): 2305–13. http://dx.doi.org/10.1016/j.clinph.2007.07.001.

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16

Hartmann, S., and M. Baumert. "0818 Cyclic Alternating Pattern as Indicator for Subjective Sleep Quality in Community-Dwelling Older Men." Sleep 43, Supplement_1 (2020): A312. http://dx.doi.org/10.1093/sleep/zsaa056.814.

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Abstract Introduction The micro-architecture of NREM sleep displays a cyclic alternating pattern (CAP) comprising activation phases of slow high-amplitude waves (A1), fast low-amplitude brain activity rhythms (A3) or a mixture of both (A2). In this study, we investigated the relationship between CAP and subjective sleep quality parameters reported by community-dwelling older men from the Osteoporotic Fractures in Men Sleep Study. Methods CAP was scored in 2,811 overnight EEG recordings using a high performance automated CAP detection system. We quantified the ratio between CAP time and NREM sl

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Zhang, Shi‐Qing, Mayumi Kimura, and Shojiro Inoué. "Effects of prolactin on sleep in cyclic rats." Psychiatry and Clinical Neurosciences 53, no. 2 (1999): 101–3. http://dx.doi.org/10.1046/j.1440-1819.1999.00504.x.

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18

Bruni, Oliviero, Luana Novelli, Silvia Miano, Liborio Parrino, Mario Giovanni Terzano, and Raffaele Ferri. "Cyclic alternating pattern: A window into pediatric sleep." Sleep Medicine 11, no. 7 (2010): 628–36. http://dx.doi.org/10.1016/j.sleep.2009.10.003.

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19

Carra, Maria Clotilde, Guido M. Macaluso, Pierre H. Rompré, et al. "Clonidine Has a Paradoxical Effect on Cyclic Arousal and Sleep Bruxism during NREM Sleep." Sleep 33, no. 12 (2010): 1711–16. http://dx.doi.org/10.1093/sleep/33.12.1711.

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20

Bang, Hakjeon, Jongdeog Kim, Sang-Soo Lee, and Chang-Soo Park. "Determination of Sleep Period for Cyclic Sleep Mode in XG-PON Power Management." IEEE Communications Letters 16, no. 1 (2012): 98–100. http://dx.doi.org/10.1109/lcomm.2011.111011.111322.

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21

Sharma, Manish, Virendra Patel, Jainendra Tiwari, and U. Rajendra Acharya. "Automated Characterization of Cyclic Alternating Pattern Using Wavelet-Based Features and Ensemble Learning Techniques with EEG Signals." Diagnostics 11, no. 8 (2021): 1380. http://dx.doi.org/10.3390/diagnostics11081380.

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Sleep is highly essential for maintaining metabolism of the body and mental balance for increased productivity and concentration. Often, sleep is analyzed using macrostructure sleep stages which alone cannot provide information about the functional structure and stability of sleep. The cyclic alternating pattern (CAP) is a physiological recurring electroencephalogram (EEG) activity occurring in the brain during sleep and captures microstructure of the sleep and can be used to identify sleep instability. The CAP can also be associated with various sleep-related pathologies, and can be useful in

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22

Singh, Gurmeet. "HEALTH AND WELLNESS THROUGH CYCLIC MEDITATION." Annals of Dunarea de Jos University of Galati Fascicle XV Physical Education and Sport Management 2 (November 9, 2023): 147–56. http://dx.doi.org/10.35219/efms.2023.2.15.

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The most significant challenge that the average person has in this fast-paced day is a troubled, unsatisfied mind as a result of leading an inappropriate lifestyle. The average person has also been significantly impacted by changes in the timing of their sleep and wakefulness, as well as by the absence of physical activity and the inclusion of outside junk foods in their diet. Ayurvedic scriptures identify ahara, nidra, and vyayam as the three sub-pillars of life. More specifically, ahara refers to one's nutrition; nidra refers to one's sleeping habits; and vyayam refers to one's physical acti

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23

Thomas, Robert Joseph. "Cyclic Alternating Pattern in the Electroencephalogram: What Is Its Clinical Utility?" Sleep 30, no. 5 (2007): 553–55. http://dx.doi.org/10.1093/sleep/30.5.553.

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24

Chamorro, Rodrigo, Raffaele Ferri, Cecilia Algarín, Marcelo Garrido, Betsy Lozoff, and Patricio Peirano. "Sleep Cyclic Alternating Pattern in Otherwise Healthy Overweight School-Age Children." Sleep 37, no. 3 (2014): 557–60. http://dx.doi.org/10.5665/sleep.3496.

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Mendez, M. O., M. Ferrario, L. Ferini-Strambi, S. Cerutti, and A. M. Bianchi. "Long-term Correlations and Complexity Analysis of the Heart Rate Variability Signal during Sleep." Methods of Information in Medicine 49, no. 05 (2010): 479–83. http://dx.doi.org/10.3414/me09-02-0037.

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Summary Background: Physiological sleep is characterized by different cyclic phenomena, such as REM, nonREM phases and the Cyclic Alternating Pattern (CAP), that are associated to characteristic patterns in the heart rate variability (HRV) signal. Disruption of such rhythms due to sleep disorders, for example insomnia or apnea syndrome, alters the normal sleep patterns and the dynamics of the HRV recorded during the night. Objectives: In this paper we analyze long-term and complexity dynamics of the HRV signal recorded during sleep in different groups of subjects. The aim is to investigate whe

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Parrino, L., G. Fioriti, and MG Terzano. "Cyclic alternating pattern (CAP) rate in the polygraphic investigation of classic and novel hypnotic drugs." European Psychiatry 11, S1 (1996): 15s—19s. http://dx.doi.org/10.1016/0924-9338(96)80464-0.

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SummaryThe difficulty to recruit homogeneous samples of insomniacs requires alternative approaches for sleep studies. Acoustic perturbation in healthy volunteers made it possible to determine an experimental model of acute situational insomnia in order to investigate the effects of classic and novel hypnotic compounds. Unfortunately, the traditional scoring parameters of sleep are inadequate to provide reliable information for defining the neurophysiological bases of insomnia and for evaluating the efficacy of hypnotic drugs. Recent studies on the microstructure of sleep have permitted to iden

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Terzano, M. G., D. Mancia, M. R. Salati, G. Costani, A. Decembrino, and L. Parrino. "The Cyclic Alternating Pattern as a Physiologic Component of Normal NREM Sleep." Sleep 8, no. 2 (1985): 137–45. http://dx.doi.org/10.1093/sleep/8.2.137.

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Zanini, Francesco, Luca Valcarenghi, Dung Pham Van, Michele Chincoli, and Piero Castoldi. "Introducing cognition in TDM PONs with cooperative cyclic sleep through runtime sleep time determination." Optical Switching and Networking 11 (January 2014): 113–18. http://dx.doi.org/10.1016/j.osn.2013.08.007.

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Mutti, Carlotta, Irene Pollara, Anna Abramo, et al. "The Contribution of Sleep Texture in the Characterization of Sleep Apnea." Diagnostics 13, no. 13 (2023): 2217. http://dx.doi.org/10.3390/diagnostics13132217.

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Obstructive sleep apnea (OSA) is multi-faceted world-wide-distributed disorder exerting deep effects on the sleeping brain. In the latest years, strong efforts have been dedicated to finding novel measures assessing the real impact and severity of the pathology, traditionally trivialized by the simplistic apnea/hypopnea index. Due to the unavoidable connection between OSA and sleep, we reviewed the key aspects linking the breathing disorder with sleep pathophysiology, focusing on the role of cyclic alternating pattern (CAP). Sleep structure, reflecting the degree of apnea-induced sleep instabi

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Weiss, J. Woodrow, Renaud Tamisier, and Yuzhen Liu. "Sympathoexcitation and arterial hypertension associated with obstructive sleep apnea and cyclic intermittent hypoxia." Journal of Applied Physiology 119, no. 12 (2015): 1449–54. http://dx.doi.org/10.1152/japplphysiol.00315.2015.

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Obstructive sleep apnea (OSA) is characterized by repetitive episodes of upper airway obstruction during sleep. These obstructive episodes are characterized by cyclic intermittent hypoxia (CIH), by sleep fragmentation, and by hemodynamic instability, and they result in sustained sympathoexcitation and elevated arterial pressure that persist during waking, after restoration of normoxia. Early studies established that 1) CIH, rather than sleep disruption, accounts for the increase in arterial pressure; 2) the increase in arterial pressure is a consequence of the sympathoactivation; and 3) arteri

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Terzano, Giovanni, Liborio Parrino, and Cristina Spaggiari. "Modifications of Cyclic Alternating Pattern in Sleep Apnea Syndrome." European Neurology 30, no. 4 (1990): 235–40. http://dx.doi.org/10.1159/000117353.

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32

Parrino, Liborio, Raffaele Ferri, Oliviero Bruni, and Mario G. Terzano. "Cyclic alternating pattern (CAP): The marker of sleep instability." Sleep Medicine Reviews 16, no. 1 (2012): 27–45. http://dx.doi.org/10.1016/j.smrv.2011.02.003.

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Bruni, Oliviero, Raffaele Ferri, Silvia Miano, et al. "Sleep cyclic alternating pattern in normal school-age children." Clinical Neurophysiology 113, no. 11 (2002): 1806–14. http://dx.doi.org/10.1016/s1388-2457(02)00265-1.

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Kutlu, Ayşe, Pervin İşeri, Macit Selekler, Gülçin Benbir, and Derya Karadeniz. "Cyclic alternating pattern analysis in REM sleep behavior disorder." Sleep and Breathing 17, no. 1 (2012): 209–15. http://dx.doi.org/10.1007/s11325-012-0675-5.

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Guilleminault, Christian, Agostinho Rosa, Dalva Poyares, Yu-shu Huang, and Ceyda Kirisoglu. "159 Sleepwalking: Sleep EEG and cyclic alternating pattern analyses." Sleep Medicine 7 (September 2006): S24—S25. http://dx.doi.org/10.1016/j.sleep.2006.07.063.

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FRANKLIN, K. "Sleep apnoea syndrome treated with oestradiol and cyclic medroxyprogesterone." Lancet 338, no. 8761 (1991): 251–52. http://dx.doi.org/10.1016/0140-6736(91)90389-7.

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Tamisier, R., G. S. Gilmartin, S. H. Launois, et al. "A new model of chronic intermittent hypoxia in humans: effect on ventilation, sleep, and blood pressure." Journal of Applied Physiology 107, no. 1 (2009): 17–24. http://dx.doi.org/10.1152/japplphysiol.91165.2008.

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Obstructive sleep apnea is characterized by repetitive nocturnal upper airway obstructions that are associated with sleep disruption and cyclic intermittent hypoxia (CIH) The cyclic oscillations in O2 saturation are thought to contribute to cardiovascular and other morbidity, but animal and patient studies of the pathogenic link between CIH and these diseases have been complicated by species differences and by the effects of confounding factors such as obesity, hypertension, and impaired glucose metabolism. To minimize these limitations, we set up a model of nocturnal CIH in healthy humans. We

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Wincor, Michael Z. "Sleep Disorders." Journal of Pharmacy Practice 3, no. 4 (1990): 221–32. http://dx.doi.org/10.1177/089719009000300404.

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Millions of patients are afflicted by a variety of sleep disorders. Sleep can be measured electrophysiologically and described in terms of nonrapid eye movement (NREM) and rapid eye movement (REM) sleep, with REM sleep being dream sleep. Overall, sleep is a cyclic phenomenon, showing a 90-minute periodicity. Sleep disorders are divided into four groups: disorders of initiating and maintaining sleep, disorders of excessive somnolence, disorders of the sleep-wake schedule, and the parasomnias. The parasomnias include sleepwalking, sleep terror, and nightmares. The classic disorders of excessive

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Anilkumar, T. V., Sajeesh Parameswaran, Anupama Kurup, M. Aswin Ganesh, V. S. Abhishek, and A. Marthanda Pillai. "Idiopathic central sleep apnea with periodicity presenting as Cheyne-Stokes breathing – Case report." Romanian Journal of Neurology 21, no. 2 (2022): 183–85. http://dx.doi.org/10.37897/rjn.2022.2.15.

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Cheyne-Stokes breathing (CSB) is described by a cyclic variation in breathing with periods of central apneas or hypopneas alternating with periods of hypopneas in a gradual waxing and waning manner. It is usually seen in patients with congestive cardiac failure or neurologic disorders. We describe this rare case of idiopathic central sleep apnea coming in a periodic fashion presenting as CSB pattern without specific causes. Overnight polysomnography test showed central sleep apnea; but cardiac evaluation and magnetic resonance imaging of the brain could not find any cause of this sleep-disorde

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Acquistapace, Paolo, Anna P. Candeloro, Vladimir Georgiev, and Maria L. Manca. "MATHEMATICAL PHASE MODEL OF NEURAL POPULATIONS INTERACTION IN MODULATION OF REM/NREM SLEEP." Mathematical Modelling and Analysis 21, no. 6 (2016): 794–810. http://dx.doi.org/10.3846/13926292.2016.1247302.

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Aim of the present study is to compare the synchronization of the classical Kuramoto system and the reaction - diffusion space time Landau - Ginzburg model, in order to describe the alternation of REM (rapid eye movement) and NREM (non-rapid eye movement) sleep across the night. These types of sleep are considered as produced by the cyclic oscillation of two neuronal populations that, alternatively, promote and inhibit the REM sleep. Even if experimental data will be necessary, a possible interpretation of the results has been proposed.

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Kahana, Yoav, Aviad Aberdam, Alon Amar, and Israel Cohen. "Deep-Learning-Based Classification of Cyclic-Alternating- Pattern Sleep Phases." Entropy 25, no. 10 (2023): 1395. http://dx.doi.org/10.3390/e25101395.

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Determining the cyclic-alternating-pattern (CAP) phases in sleep using electroencephalography (EEG) signals is crucial for assessing sleep quality. However, most current methods for CAP classification primarily rely on classical machine learning techniques, with limited implementation of deep-learning-based tools. Furthermore, these methods often require manual feature extraction. Herein, we propose a fully automatic deep-learning-based algorithm that leverages convolutional neural network architectures to classify the EEG signals via their time-frequency representations. Through our investiga

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Korkmaz, Selda, Nedime Tugce Bilecenoglu, Murat Aksu, and Tahir Kurtulus Yoldas. "Cyclic Alternating Pattern in Obstructive Sleep Apnea Patients with versus without Excessive Sleepiness." Sleep Disorders 2018 (2018): 1–7. http://dx.doi.org/10.1155/2018/8713409.

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Background.One of the main hypotheses on the development of daytime sleepiness (ES) is increased arousal in obstructive sleep apnea (OSA). Cyclic alternating pattern (CAP) is considered to be the main expression of sleep microstructure rather than arousal. Therefore, we aimed to investigate whether there is any difference between OSA patients with versus without ES in terms of the parameters of sleep macro- and microstructure and which variables are associated with Epworth Sleepiness Scale (ESS) score.Methods.Thirty-eight male patients with moderate to severe OSA were divided into two subgroup

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Sack, R. L., M. L. Blood, R. J. Hughes, and A. J. Lewy. "Circadian-Rhythm Sleep Disorders in Persons who are Totally Blind." Journal of Visual Impairment & Blindness 92, no. 3 (1998): 145–61. http://dx.doi.org/10.1177/0145482x9809200303.

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People who are totally blind are prone to a cyclic form of insomnia, designated in medical terminology as non-24-hour sleep-wake syndrome. It is caused by a lack of synchrony between the internal body clock and the daily sleep-wake schedule. This article describes the clinical features and biological basis of the disorder and discusses the implications for its management and treatment.

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Powell, Weston, Lindsay Clark, Maria White, et al. "0006 Circadian Cyclic Gene Expression in Human Airway Epithelial Cells in Asthma and Viral Infections." SLEEP 47, Supplement_1 (2024): A3. http://dx.doi.org/10.1093/sleep/zsae067.0006.

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Abstract Introduction Cellular circadian rhythms regulate gene expression and innate immune pathways related to airway diseases in animal models of disease. However, circadian regulation of gene expression remains uninvestigated in human airway epithelial cells. Primary human airway epithelial cells can be grown at an air-liquid interface as an ex vivo organotypic model to characterize molecular circadian rhythms in the human airway. Using cells from healthy and donors with disease, we hypothesized that circadian cyclic gene expression would be altered in asthma and would display altered viral

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Krieger, Jean, Mariette Schmidt, Emilia Sforza, et al. "Urinary excretion of guanosine 3′:5′-cyclic monophosphate during sleep in obstructive sleep apnoea patients with and without nasal continuous positive airway pressure treatment." Clinical Science 76, no. 1 (1989): 31–37. http://dx.doi.org/10.1042/cs0760031.

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1. It has recently been shown that obstructive sleep apnoea (OSA) patients have increased urinary water and salt excretion during sleep which tends to normalize with nasal continuous positive airway pressure (CPAP) treatment. 2. To investigate the mechanisms of these changes in renal function, nocturnal urinary excretion of catecholamines and guanosine 3′:5′-cyclic monophosphate (cyclic GMP), which reflects atrial natriuretic factor (ANF) release, and next-morning plasma active renin concentrations were studied in 21 OSA patients on 2 consecutive nights, either untreated or treated with nasal

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Zvereva, Natalia A., Yulia P. Milyutina, and Inna I. Evsyukova. "Serotonin and cyclic sleep organization in healthy full-term newborns." Journal of obstetrics and women's diseases 70, no. 1 (2021): 69–76. http://dx.doi.org/10.17816/jowd64125.

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Relevance: The growth of neuropsychiatric diseases caused by perinatal pathology indicates the need to study the biochemical markers of brain damage in the newborn for the timely prevention of adverse consequences. Serotonin in early ontogenesis provides intensive development of neuronal structures and cortical networks involved in the mechanisms of formation of cyclic sleep organization a fine criterion of morphofunctional development of the brain. aim: The aim of the work is to study the content of serotonin in healthy full-term newborns in comparison with the quantitative and qualitat

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Vergara-Sánchez, Diana Laura, Hiram Calvo, and Marco A. Moreno-Armendáriz. "Distributional Representation of Cyclic Alternating Patterns for A-Phase Classification in Sleep EEG." Applied Sciences 13, no. 18 (2023): 10299. http://dx.doi.org/10.3390/app131810299.

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This article describes a detailed methodology for the A-phase classification of the cyclic alternating patterns (CAPs) present in sleep electroencephalography (EEG). CAPs are a valuable EEG marker of sleep instability and represent an important pattern with which to analyze additional characteristics of sleep processes, and A-phase manifestations have been linked to some specific conditions. CAP phase detection and classification are not commonly carried out routinely due to the time and attention this problem requires (and if present, CAP labels are user-dependent, visually evaluated, and han

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Mendonça, Fábio, Sheikh Shanawaz Mostafa, Fernando Morgado-Dias, and Antonio G. Ravelo-García. "A Portable Wireless Device for Cyclic Alternating Pattern Estimation from an EEG Monopolar Derivation." Entropy 21, no. 12 (2019): 1203. http://dx.doi.org/10.3390/e21121203.

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Quality of sleep can be assessed by analyzing the cyclic alternating pattern, a long-lasting periodic activity that is composed of two alternate electroencephalogram patterns, which is considered to be a marker of sleep instability. Experts usually score this pattern through a visual examination of each one-second epoch of an electroencephalogram signal, a repetitive and time-consuming task that is prone to errors. To address these issues, a home monitoring device was developed for automatic scoring of the cyclic alternating pattern by analyzing the signal from one electroencephalogram derivat

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Ghodsi, Fatemeh, Forozan Olfati, Nasim Bahrami, and Maryam Farhad. "Cyclic Mastalgia in Iranian Women: A Review." Journal of Qazvin University of Medical Sciences 24, no. 6 (2020): 566–81. http://dx.doi.org/10.32598/jqums.24.6.8.

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Despite the high prevalence of cyclic mastalgia, there is much disagreement and uncertainties about its treatment methods. The present study aims to review studies conducted on cyclic mastalgia over the past two decades in Iran. In this regard, a search was conducted in Scopus, SID, PubMed, Google Scholar, ScienceDirect, and IranMedex databases on articles published in Persian and English from 1998 to 2018 using the following keywords: “Mastalgia”, “cyclic mastalgia”, “breast pain”, and “Mastodynia”. Initial search yielded 975 articles. Of these, 29 were selected for review based on inclusion

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Aslam Butt, Rizwan, Sevia Mahdaliza Idrus, Kashif Naseer Qureshi, Pir Meher Ali Shah, and Nadiatulhuda Zulkifli. "An energy efficient cyclic sleep control framework for ITU PONs." Optical Switching and Networking 27 (January 2018): 7–17. http://dx.doi.org/10.1016/j.osn.2017.06.002.

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