Assessing gray matter volume in patients with idiopathic rapid eye movement sleep behavior disorder

Idiopathic rapid eye movement sleep behavior disorder(iRBD) is often a precursor to neurodegenerative disease. However, voxel-based morphological studies evaluating structural abnormalities in the brains of iRBD patients are relatively rare. This study aimed to explore cerebral structural alterations using magnetic resonance imaging and to determine their association with clinical parameters in iRBD patients. Brain structural T1-weighted MRI scans were acquired from 19 polysomnogram-confirmed iRBD patients(male:female 16:3; mean age 66.6 ± 7.0 years) and 20 age-matched healthy controls(male:female 5:15; mean age 63.7 ± 5.9 years). Gray matter volume(GMV) data were analyzed based on Statistical Parametric Mapping 8, using a voxel-based morphometry method and two-sample t-test and multiple regression analysis. Compared with controls, iRBD patients had increased GMV in the middle temporal gyrus and cerebellar posterior lobe, but decreased GMV in the Rolandic operculum, postcentral gyrus, insular lobe, cingulate gyrus, precuneus, rectus gyrus, and superior frontal gyrus. iRBD duration was positively correlated with GMV in the precuneus, cuneus, superior parietal gyrus, postcentral gyrus, posterior cingulate gyrus, hippocampus, lingual gyrus, middle occipital gyrus, middle temporal gyrus, and cerebellum posterior lobe. Furthermore, phasic chin electromyographic activity was positively correlated with GMV in the hippocampus, precuneus, fusiform gyrus, precentral gyrus, superior frontal gyrus, cuneus, inferior parietal lobule, angular gyrus, superior parietal gyrus, paracentral lobule, and cerebellar posterior lobe. There were no significant negative correlations of brain GMV with disease duration or electromyographic activity in iRBD patients. These findings expand the spectrum of known gray matter modifications in iRBD patients and provide evidence of a correlation between brain dysfunction and clinical manifestations in such patients. The protocol was approved by the Ethics Committee of Huashan Hospital(approval No. KY2013-336) on January 6, 2014. This trial was registered in the ISRCTN registry(ISRCTN18238599).

Chemogenetic activation of sublaterodorsal tegmental glutamatergic neurons alleviates rapid eye movement sleep behavior disorder symptoms in a chronic rat model of Parkinson disease

Rapid eye movement(REM)sleep behavior disorder(RBD)is a parasomnia that is featured by elevated motor behaviors and dream enactments during REM sleep.Clinical observations show that RBD bears significant relevance with several synucleinopathies such as Lewy body dementia and Parkinson disease(PD),and often develops prior to their diagnosis.Being a potential biomarker of PD,investigating the relationship of RBD symptoms and their emergence in developing PD would provide insight intoits pathogenesis.Here,in a chronic model of PD,rats with daily rotenone treatment exhibited key RBD features,including elevated sleep muscle tone,sleep fragmentation and EEG slowing at different time points.Based on detectedearly alpha synuclein aggregation and neural apoptosis in the sublaterodorsal tegmental nucleus(SLD),an area known to promote REM sleep and maintain sleep muscle atonia,the possible involvement of SLD glutamatergic neurons was interrogated.Via chemogenetic activation of SLD glutamatergic neurons,key RBD symptoms and EEG slowing in REM sleep were alleviated.These results are consistent with a progressive degeneration in REM sleep promoting pathways.Our findings provide a foundation for further studies into RBD and its relationship to neurodegenerative diseases.

Gender Differences in Rapid Eye Movement-Related Sleep Disordered Breathing

Sleep disordered breathing (SDB) is an independent risk factor for cardiovascular disease. It is known to be associated more frequently with men than women, particularly in the premenopausal age range. The goal of this study is to evaluate gender differences among Korean patients diagnosed with SBD. This study included 309 patients who visited our Sleep Clinic due to sleep-related symptoms and were diagnosed with SDB by overnight polysomnography (PSG). We analyzed age, gender, body mass index, various PSG indices including sleep stages, apnea-hypopnea index (AHI) and AHI ratio in rapid eye movement (REM) versus non-REM (NREM) sleep stages (R:N ratio). Of those 309 patients diagnosed with obstructive sleep apnea, 217 (70.2%) were men (mean age 51.05 ± 12.64 years) and 92 (29.8%) were women (mean age 64.53 ± 10.43 years). The mean AHI during total sleep time was 30.34 ± 21.17 in men and 21.47 ± 17.14 in women (P P P = 0.402). REM SDB with R:N ratio higher than 2.0 was more frequently observed in women than in men, 34.8% (32/92) of women, compared with 11.9% (26/217) in men (P 60 years old. These findings suggest the possibility of different pathophysiologic mechanisms of SDB between genders and also between NREM versus REM sleep, which can be partly explained by the influence of female sex hormones.

Sleep disorders in Alzheimer’s disease:the predictive roles and potential mechanisms

Sleep disorders are common in patients with Alzheimer’s disease,and can even occur in patients with amnestic mild cognitive impairment,which appears before Alzheimer’s disease.Sleep disorders further impair cognitive function and accelerate the accumulation of amyloid-βand tau in patients with Alzheimer’s disease.At present,sleep disorders are considered as a risk factor for,and may be a predictor of,Alzheimer’s disease development.Given that sleep disorders are encountered in other types of dementia and psychiatric conditions,sleep-related biomarkers to predict Alzheimer’s disease need to have high specificity and sensitivity.Here,we summarize the major Alzheimer’s disease-specific sleep changes,including abnormal non-rapid eye movement sleep,sleep fragmentation,and sleep-disordered breathing,and describe their ability to predict the onset of Alzheimer’s disease at its earliest stages.Understanding the mechanisms underlying these sleep changes is also crucial if we are to clarify the role of sleep in Alzheimer’s disease.This paper therefore explores some potential mechanisms that may contribute to sleep disorders,including dysregulation of the orexinergic,glutamatergic,andγ-aminobutyric acid systems and the circadian rhythm,together with amyloid-βaccumulation.This review could provide a theoretical basis for the development of drugs to treat Alzheimer’s disease based on sleep disorders in future work.

Effect of Rapid Eye Movement Sleep Behavior Disorder on Obstructive Sleep Apnea Severity and Cognition of Parkinson＇s Disease Patients

Background：Rapid eye movement （REM） sleep behavior disorder （RBD） and obstructive sleep apnea （OSA） are the most common sleep disorders in Parkinson’s disease （PD）. The aim of this study was to identify whether RBD could alleviate OSA severity in PD patients and its effect on cognitive impairment.Methods：From February 2014 to May 2017, we recruited 174 PD patients from the Second Affiliated Hospital of Soochow University, all of whom underwent polysomnography （PSG）. We collected clinical data, PSG results, and compared information between patients with and without RBD or OSA by analysis of covariance. We also investigated the effect of these sleep disorders on cognitive impairment using linear regression.Results：We grouped participants as follows： PD only （n = 53）, PD ＋ OSA （n = 29）, PD ＋ RBD （n = 61）, and PD ＋ RBD ＋ OSA （n = 31）. Minimum oxygen saturation （SaO2） during whole sleep and in REM sleep was higher in PD ＋ RBD ＋ OSA patients than that in PD ＋ OSA patients. PD ＋ RBD patients had worse Mini-Mental Status Examination and Montreal Cognitive Assessment （MoCA） scores than those in the PD group （P 〈 0.001）, especially in visuospatial/executive, attention, and memory functions. The PD ＋ OSA group performed worse than the PD group in the delayed recall domain. After adjusting for age, sex, body mass index, education, disease severity, and other sleep disorders, MoCA was negatively associated with OSA （β = ？0.736, P = 0.043） and RBD （β = ？2.575, P 〈 0.001）. The severity of RBD （tonic/phasic electromyography activity） and OSA （apnea-hypopnea index/oxygen desaturation index/minimum SaO2） were also associated with MoCA. The adjusted β values of RBD-related parameters were higher than that for OSA.Conclusions：We found that RBD alleviated OSA severity; however, RBD and OSA together exacerbated PD cognitive impairment. Further studies are needed to evaluate whether OSA treatment can improve cognition in PD.

Rapid Eye Movement Sleep Behavior Disorder Symptoms Correlate with Domains of Cognitive Impairment in Parkinson＆#39;s Disease

Background： Rapid eye movement （REM） sleep behavior disorder （RBD） may be a risk factor for cognitive impairment in patients with Parkinson＆#39;s disease （PD）.However, little is known regarding the relation between the severity of RBD and the different domains of cognitive impairment.The aim of this study was： （1） to investigate the domains of cognitive impairment in patients with PD and RBD, and （2） to explore risk factors for PD-mild cognitive impairment （PD-MCI） and the relationship between RBD severity and impairment in different cognitive domains in PD.Methods： The participants were grouped as follows： PD without RBD （PD-RBD;n =42）, PD with RBD （PD ＋ RBD;n =32）, idiopathic RBD （iRBD;n =15）, and healthy controls （HCs;n =36）.All participants completed a battery of neuropsychological assessment of attention and working memory, executive function, language, memory, and visuospatial function.The information of basic demographics, diseases and medication history, and motor and nonmotor manifestations was obtained and compared between PD-RBD and PD ＋ RBD groups.Particular attention was paid to the severity of RBD assessed by the RBD Questionnaire-Hong Kong （RBDQ-HK） and the RBD Screening Questionnaire （RBDSQ）, then we further examined associations between the severity of RBD symptoms and cognitive levels via correlation analysis.Results： Compared to PD-RBD subjects, PD ＋ RBD patients were more likely to have olfactory dysfunction and their Epworth Sleepiness Scale scores were higher （P 〈 0.05）.During neuropsychological testing, PD ＋ RBD patients performed worse than PD-RBD patients, including delayed memory function, especially.The MCI rates were 33%, 63%, 33%, and 8% for PD-RBD, PD ＋ RBD, iRBD, and HC groups, respectively.RBD was an important factor for the PD-MCI variance （odds ratio =5.204, P =0.018）.During correlation analysis, higher RBDSQ and RBDQ-HK scores were significantly associated with poorer performance on the Trail Making Test-B （errors） and Auditory Verbal Learning Test （delayed recall） and higher RBD-HK scores were also associated with Rey-Osterrieth complex figure （copy） results.Conclusions： When PD-RBD and PD ＋ RBD patients have equivalent motor symptoms, PD ＋ RBD patients still have more olfactory dysfunction and worse daytime somnolence.RBD is an important risk factor for MCI, including delayed memory.Deficits in executive function, verbal delayed memory, and visuospatial function were consistently associated with more severe RBD symptoms.

Clinical features of Parkinson’s disease with and without rapid eye movement sleep behavior disorder

Background:Rapid eye movement sleep behavior disorder(RBD)and Parkinson’s disease(PD)are two distinct clinical diseases but they share some common pathological and anatomical characteristics.This study aims to confirm the clinical features of RBD in Chinese PD patients.Methods:One hundred fifty PD patients were enrolled from the Parkinson`s disease and Movement Disorders Center in Department of Neurology,Shanghai General Hospital from January 2013 to August 2014.This study examined PD patients with or without RBD as determined by the REM Sleep Behavior Disorder Screening Questionnaire(RBDSQ),assessed motor subtype by Unified PD Rating Scale(UPDRS)III at“on”state,and compared the sub-scale scores representing tremor,rigidity,appendicular and axial.Investigators also assessed the Hamilton Anxiety Scale(HAMA),Hamilton Depression Scale(HAMD),Mini-Mental State Examination(MMSE),Clinical Dementia Rating(CDR),and Parkinson’s disease Sleep Scale(PDSS).Results:One hundred fourty one PD patients entered the final study.30(21.28%)PD patients had probable RBD(pRBD)diagnosed with a RBDSQ score of 6 or above.There were no significant differences for age,including age of PD onset and PD duration,gender,smoking status,alcohol or coffee use,presence of anosmia or freezing,UPDRS III,and H-Y stages between the pRBD+and pRBD−groups.pRBD+group had lower MMSE scores,higher PDSS scores,and pRBD+PD patients had more prominent proportion in anxiety,depression,constipation,hallucination and a greater prevalence of orthostatic hypotension.Conclusion:pRBD+PD patients exhibited greater changes in non-motor symptoms.However,there was no increase in motor deficits.

Comparison Study of Polysomnographic Features in Multiple System Atrophy-cerebellar Types Combined with and without Rapid Eye Movement Sleep Behavior Disorder

Background： The brain stem is found to be impaired in multiple system atrophy-ccrcbellar types （MSA-C）. Rapid eye movement （REM） sleep behavior disorder （RBD） is reported as a marker of progressive brain stem dysfunction. Few systematic studies about the sleep disturbances in MSA-C patients combined with or without RBD were reported. This study aimed to explore the polysomnographic （PSG） features of sleep disturbances between MSA-C patients with and without RBD. Methods： Totally, 46 MSA-C patients （23 with RBD, and 23 without RBD） were enrolled in this study. All patients underwent a structured interview for their demographic data, history of sleep pattern, and movement disorders; and then, overnight video-PSG was performed in each patient. All the records were evaluated by specialists at the Sleep Medicine Clinic for RBD and the Movement Disorder Clinic for MSA-C. The Student＇s t-test, Mann-Whitney U-test for continuous variables, and the Chi-square test for categorical variables were used in this study. Results： MSA-C patients with RBD had younger visiting age （52.6 ± 7.4 vs. 56.7 ± 6.0 years, P = 0.046） and shorter duration of the disease （12.0 [12.0, 24.0] vs. 24.0 [14.0, 36.0] months, P 0.009） than MSA-C patients without RBD. MSA-C with RBD had shorter REM sleep latency （111.7 ± 48.2 vs. 157.0 ± 68.8 rain, P = 0.042）, higher percentage of REM sleep （14.9% ±4.0% vs. 10.0% ± 3.2%, P = 0.019）, and lower Stage 1 （9.5% ±7.2% vs. 15.9% ±8.0%, P= 0.027） than MSA-C without RBD. Moreover, MSA-C patients with RBD had more decreased sleep efficiency （52.4% ±12.6% vs. 65.8% ±15.9%, P = 0.029） than that without RBD. Conclusions： In addition to the RBD, MSA-C patients with RBD had other more severe sleep disturbances than those without RBD. The sleep disorders of MSA patients might be associated with the progress of the disease.

CSF Aβ1-42 level is associated with cognitive decline in early Parkinson’s disease with rapid eye movement sleep behavior disorder

Background:Rapid eye movement sleep behavior disorder(RBD)is associated with cognitive decline in early Parkinson’s disease(PD).However,the underlyling basis for this association remains unclear.Methods:Parkinson’s Progression Marker’s Initiative(PPMI)subjects underwent baseline RBD testing with RBD sleep questionnaire(RBDSQ).Serial assessments included measures of motor symptoms,non-motor symptoms(NMS),neuropsychological assessment,blood and cerebrospinal fluid(CSF)biomarkers.Up to three years follow-up data were included.We stratified early PD subjects into PD with RBD(RBDSQ score>5)and PD without RBD groups.Then,we evaluated baseline biomarkers in each group as a predictor of cognitive decline using Montreal Cognitive Assessment(MoCA)score changes over three years in regression models.Results:Four hundred twenty-three PD subjects were enrolled at baseline,and a total of 350 PD subjects had completed 3 years of study follow-up with completely serial assessments.We found that at baseline,only CSF β-amyloid 1–42(Aβ1–42)was significantly lower in PD subjects with RBD.On three years follow-up analysis,PD subjects with RBD were more likely to develop incident mild cognitive impairment(MCI)and presented greater cognitive decline in MoCA score.Lower baseline CSF Aβ1–42 predicted cognitive decline over 3 years only in PD subjects with RBD(β=−0.03,P=0.003).A significant interaction between Aβ1–42 and the 2 groups confirmed that this effect was indeed higher in PD with RBD than the other individual(β=−2.85,P=0.014).Conclusion:These findings indicate that CSF Aβ1–42 level is associated with global cognitive decline in early PD with RBD.The addition of CSF Aβ1–42 to RBD testing increase the likelihood of identifying those at high risk for cognitive decline in early PD.

帕金森病伴睡眠障碍的研究进展

帕金森病(PD)是一种与运动和非运动症状相关的大脑退行性疾病,与环境、遗传、神经系统老化等多种因素有关。近年的调查研究显示,中国PD平均患病年龄60岁,在65岁以上人群中,每10万人约1700名患者。睡眠障碍是PD的非运动症状之一,临床表现包括失眠、白天过度嗜睡、不宁腿综合征、快速眼动期睡眠行为障碍以及睡眠呼吸障碍等多种类型。由于存在个体差异,PD伴睡眠障碍疾病治疗过程中应在医生指导下选择最适合患者个体的药物。本文对PD睡眠障碍发病机制和常用药物治疗方案进行综述,希望能够为今后PD伴睡眠障碍的治疗提供新的思路。

伴和不伴快速眼动睡眠行为障碍帕金森病患者自发脑活动的静息态功能磁共振成像研究

目的快速眼动睡眠行为障碍(rapid eye movement sleep behavior disorder,RBD)是帕金森病(Parkinson's disease,PD)常见的非运动症状且是重要预后因素。本研究通过静息态功能磁共振成像,利用度中心度(degreecentrality,DC)和低频振幅(amplitudes of low-frequency fluctuation,ALFF)分析PD伴RBD和不伴有RBD患者组以及健康对照组三组间DC值和ALFF值,探索PD伴RBD患者脑功能活动特征及RBD特异性脑区,探究RBD发生的病理机制。材料与方法招募20例伴有RBD的PD患者(PD-RBD组)、40例无RBD的PD患者(PD-nonRBD组)和44例年龄性别匹配的健康对照(健康对照组),三组被试均接受磁共振扫描。利用静息态数据计算DC值和ALFF值,探测脑功能特征。结果方差分析结果显示三组间DC值主效应脑区为右侧中央前回、颞上回、小脑、额中回(P<0.05,FDR校正);ALFF值主效应脑区为左侧海马旁回、楔叶、舌回(P<0.05,FDR校正)。进一步分析发现相比于PD-nonRBD组,PD-RBD患者表现为右侧额中回DC值升高(t=4.02;P=0.007,FDR校正);左侧楔前叶DC值降低(t=5.30;P=0.009,FDR校正)。相比于健康对照组,PD-RBD患者表现为左侧额上回、小脑、右侧颞上回、左侧颞中回、额中回的DC值升高(P<0.05,FDR校正);左侧中央前回、颞上回和颞中回的DC值降低(P<0.05,FDR校正);右侧楔叶ALFF值降低(P<0.05,FDR校正)。结论PD-RBD在DC和ALFF上有独特的影像学特征,特别是右侧额中回、左侧楔前叶的功能异常可能与PD患者RBD的发生密切相关。

重复经颅磁刺激治疗帕金森病伴快速眼动睡眠行为障碍观察

目的探讨重复经颅磁刺激对帕金森病伴快速眼动睡眠行为障碍患者实施治疗的可行性与安全性。方法回顾性分析福州市第二医院2021年3月—2023年3月收治的帕金森病伴快速眼动睡眠行为障碍患者病例资料,查阅并筛选出100例帕金森病伴快速眼动睡眠行为障碍患者完整病例,根据治疗方案分为2组,各50例。参照组采取药物治疗,研究组则在参照组治疗基础上配合重复经颅磁刺激治疗。比较2组治疗效果。结果2组患者治疗后的总睡眠时间(total sleep time,TST)、睡眠效率(sleep efficiency,SE)、快速眼动睡眠时间(rapid eye movement sleep,REMS)比治疗前更高,且研究组治疗后的指标[(360.45±25.68)min、(76.15±5.15)%、(12.85±4.32)min]均高于参照组[(317.85±23.12)min、(68.76±4.31)%、(8.05±1.65)min];而睡眠潜伏期(sleeplatency,SL)、醒觉指数(arousalindex,AI)则要低于治疗前,且研究组治疗后的指标[(17.12±3.45)min、(24.05±2.48)次/h]低于参照组[(24.18±4.36)min、(35.36±3.12)次/h],差异有统计学意义(P<0.05)。治疗后,2组的爱泼沃斯嗜睡量表(Epworth sleeping scale,ESS)评分要低于治疗前,且研究组治疗后评分[(6.01±2.02)分]低于参照组[(8.12±2.05)分],而蒙特利尔认知评估量表(Montreal cognitive assess-ment scale,MoCA)评分、PD睡眠量表(PDsleepscale,PDSS)评分高于治疗前,且研究组治疗后的分数[(25.38±2.76)分、(119.85±11.05)分]明显高出参照组[(22.38±2.13)分、(113.15±10.35)分],差异有统计学意义(P<0.05)。2组不良反应发生率比较,差异无统计学意义(P>0.05)。结论对于帕金森病伴快速眼动睡眠行为障碍采取重复经颅磁刺激治疗,可取得良好治疗效果,对于患者的睡眠障碍改善、认知功能改善有积极作用,且不会增加患者的不良反应发生率,具有较高的安全性。

杏仁核对焦虑样睡眠障碍的调控

焦虑症常与睡眠障碍共存且相互作用,一方面睡眠障碍可引起焦虑,另一方面焦虑患者常出现失眠、睡眠片段化等焦虑样睡眠改变。基底外侧杏仁核和中央杏仁核与脑内多个睡眠-觉醒调控核团存在纤维联系,是调控焦虑样行为与睡眠的关键核团。本研究总结杏仁核解剖结构、纤维联系,以及杏仁核调节焦虑样行为与睡眠障碍的作用机制与神经环路,对进一步理解睡眠与焦虑相互作用的潜在机制具有重要意义,为临床治疗焦虑症和睡眠障碍提供理论基础。

老年帕金森病患者外周血、胆红素、前列腺素E表达与疾病分级、快速眼动睡眠障碍的相关性

目的 探讨老年帕金森病(PD)患者外周血神经丝轻链蛋白(NFL)、胆红素、前列腺素E表达与疾病分级、快速眼动睡眠障碍的相关性。方法 选取2020年1月至2022年10月在商洛市中心医院神经内科诊治的106例老年PD患者为研究对象,根据是否出现快速眼动睡眠障碍分为睡眠正常组和睡眠障碍组。收集患者的临床资料,比较不同疾病分级患者外周血NFL、胆红素、前列腺素E表达的区别,使用单因素和多因素Logistic回归分析外周血NFL、胆红素、前列腺素E表达、疾病分级及其他因素对老年PD患者快速眼动睡眠障碍发生的影响并构建患者睡眠障碍发生的风险预测模型,使用受试者工作特征(ROC)曲线评价该模型的预测性能。结果 不同疾病分期患者多周血NFL、胆红素及前列腺素E比较结果显示,早期组NFL及前列腺素E2均显著低于中晚期组,总胆红素显著高于中晚期组(~均P<0.05)。其中睡眠正常组41例(38.68%),睡眠障碍组65例(61.32%),多因素分析结果显示,两组患者NFL(OR=1.340,95%CI=1.035~1.736,P=0.027)、前列腺素E2 (OR=1.141,95%CI=1.052~1.237,P=0.001)、汉密尔顿焦虑量表(HAMA)(OR=1.378,95%CI=1.084~1.752,P=0.009)、汉密尔顿抑郁量表(HAMD)(OR=1.398,95%CI=1.092-1.790,P=0.008)为老年PD患者快速眼动睡眠障碍发生的独立影响因素(~均P<0.05)。在此基础上建立风险预测模型,模型公式:Logit(P)=-34.469+0.293×NFL+0.132×前列腺素E2+0.321×HAMA+0.335×HAMD。其ROC曲线下面积为0.992,95%CI:0.981~1.000,敏感度为0.969,特异度为0.951,Youden指数为0.920。结论 老年PD患者外周血NFL及前列腺素E表达均是其快速眼动睡眠障碍发生的独立影响因素,疾病分级及总胆红素未能纳入模型,可能与其他数据的干扰有关。

Polysomnographic sleep aspects in liver cirrhosis: A case control study

AIM: To study sleep aspects and parameters in cirrhotic patients and assess the role of liver dysfunction severity in polysomnographic results. METHODS: This was a case-control study. Patients with a diagnosis of liver cirrhosis were consecutively enrolled in the study. Clinical examinations and laboratory liver tests were performed in all patients, and disease severity was assessed using the Child-Pugh score. The control group consisted of ageand gender-matched healthy volunteers. All individuals answered a questionnaire about habits, behaviors, and complaints related to sleep and were submitted to polysomnography. Sleep parameters were compared between the two groups, and separate analyses were performed among classesof Child-Pugh classification in the cirrhotic group. RESULTS: Forty-two cirrhotic patients and forty-two controls were enrolled. Compared to the control group, the cirrhotic group exhibited lower sleep efficiency (mean ± SD: 73.89% ± 14.99% vs 84.43% ± 8.55%, P < 0.01), increased latency (151.27 ± 93.24 min vs 90.62 ± 54.74 min, P < 0.01) and a lower percentage of rapid eye movement (REM) sleep (14.04% ± 5.64% vs 20.71% ± 6.77%, P < 0.05) as well as a higher frequency of periodic limb movements (10.56 ± 2.85/h vs 2.79 ± 0.61/h, P < 0.01). The comparison of sleep parameters among Child A, B and C cirrhotic patients revealed a significant reduction of REM sleep stage occurrence in individuals with severe liver disease (Child C patients) compared to Child A/B patients (polysomnography percentage of REM sleep stage of patients Child A: 16.1% ± 1.2%; Child B: 14.9% ± 1.2%; Child C: 8.6% ± 1.6%, P < 0.05). CONCLUSION: Cirrhosis was associated with shorter sleep time, reduced sleep efficiency, increased sleep latency, increased REM latency and reduced REM sleep. Additionally, disease severity influences sleep parameters.

Sleep Disturbance in Parkinson’s Disease Varies with Age of Onset and Family History

Introduction: Parkinson’s disease (PD) is a progressive neurodegenerative disease more common in those over the age of 60. PD is classically characterized by motor features, although patients may also experience non-motor symptoms. Sleep disturbances, such as rapid eye movement (REM) behavior disorder (RBD), are common in patients with PD and may precede onset of PD. Methods: Data was collected on patients with PD (358 subjects)in a movement disorders clinic at a safety net hospital. In this retrospective database analysis, the association of PD complications with age of onset was evaluated using chi-square tests and logistic regression. Results: Of the PD complications analyzed, there was a significant difference in sleep disturbances by age. Among the 358 PD patients, 120 individuals (33.5%) had information regarding the presence or absence of sleep disturbances. There was a significant difference between the early (onset < 50) and later onset (≥50) groups (p = 0.03) with the odds of having a sleep disorder for the early group 1.6 times that of the late group. Those subjects with siblings who also had PD had 2.0 times the odds of having a sleep disorder compared those without (p = 0.02). Conclusion: Non-motor symptoms such as sleep disorders are a useful predictor of early onset PD. Genetic components of PD impact both motor and non-motor aspects of the disease.

Sleep Paralysis - Cultural Significance and Its Management

Sleep paralysis (SP) is a benign,transient episode of immobility and it lasts a few seconds to a few minutes.It can occur while falling asleep or on awakening.It is a condition of unknown etiology and all the skeletal muscles are almost ‘paralyzed’.It leads to an inability to speak or move but individual remains conscious.This review summarizes the existential clinical literature on sleep paralysis most relevant to practitioners;also summarizes the many historical and artistic manifestations of SP in different cultures.It also throws light on the available Arabic literature and others as per the aim of the review.For this review,literature search using engines was carried out,and review papers and original research articles were analyzed.We start with a review which summarizes the collection of symptoms,prevalence rate,risk factors and etiological theories,characteristics and classification of the SP over the past years up to the present time,also the management in the form of psychotherapy and pharmacotherapy as well as the cultural significances in different countries.SP plays an important role in the genesis and maintenance of many supernatural beliefs such as nocturnal alien abductions,demonic and ghost attacks in individuals with intact reality testing.

基于多导睡眠监测技术的帕金森病睡眠结构特征分析

目的 采用多导睡眠监测的方法研究客观评估快动眼睡眠行为障碍(RBD)以及帕金森病(PD)患者的睡眠结构。方法 收集就诊于陕西省人民医院神经内科的RBD、PD患者及性别、年龄匹配的对照人群,收集人口学资料及病史,并进行多导睡眠监测,分析睡眠结构及应用数学方法提取脑电信号特征。结果 共纳入RBD患者28例,PD患者39例,正常对照组50例。PD组的睡眠效率、R期睡眠占比、N2期睡眠占比显著低于对照组(P<0.05),PD组的睡眠潜伏期、R期睡眠潜伏期、N1期睡眠占比显著高于对照组(P<0.05);RBD介于对照组与PD组之间,与PD组变化趋势一致,但差异无统计学意义(P>0.05)。PD组在小波包分解法(3,4)处能量值显著升高。结论 PD患者有着显著及客观存在的睡眠障碍,应用PSG进行睡眠结构分析有助于发现早期PD甚至临床前期PD。小波包分解法(3,4)处能量值升高很可能是PD的前驱生物标志物。

Increased Arousal Levels and Decreased Sleep by Brain Music in Rats

More and more studies have been reported on whether music and other types of auditory stimulation would improve the quality of sleep. Many of these studies have found significant results, but others argue that music is not significantly better than the tones or control conditions in improving sleep. For further understanding the relationship between music and sleep or music and arousal, the present study therefore examines the effects of brain music on sleep and arousal by means of biofeedback. The music is from the transformation of rapid eye movement （REM） sleep electroencephalogram （EEG） of rats using an algorithm in the Chengdu Brain Music （CBM） system. When the brain music was played back to rats, EEG data were recorded to assess the efficacy of music to induce or improve sleep, or increase arousal levels by sleep staging, etc. Our results demonstrate that exposure to the brain music increases arousal levels and decreases sleep in rats, and the underlying mechanism of decreased non-rapid eye movement （NREM） and REM sleep may be different.

伴或不伴快动眼睡眠行为障碍的帕金森病临床特点比较

目的 比较伴或不伴快动眼睡眠行为障碍的帕金森病(PD-RBD^(+);PD-RBD^(-))在临床特征上的差异。方法 收集在陕西省人民医院就诊的PD患者,通过多导睡眠监测技术(PSG)将其划分为PD-RBD^(+)组和PD-RBD^(-)组,收集人口学资料,完成临床资料收集及相关神经心理量表测评,统计两组患者病情严重程度、运动及非运动症状特点,并进行统计分析。结果 共纳入PD患者59例,其中PDRBD^(+)组25例,PD-RBD^(-)组34例。PD-RBD^(+)组比PD-RBD^(-)组男性更多,强直为主型占比多,UPDRS第Ⅲ部分分数更高,冻结和体位性低血压发生率高。结论 总体而言,PD-RBD^(+)组症状较PD-RBD^(-)组更重。