Improvement In Sleep Disturbance Research Articles

Effects of Symptom Severity and Symptom Interference on Sleep Disturbance in Cancer Patients

Purpose: The purpose of this study was conducted to identify the impact of Symptom Severity and Symptom Interference on Sleep Disturbance among cancer patients. Methods: This study was conducted from October 8th to October 25th, 2012. One hundred eight cancer patients were recruited from S city in Korea. The instruments used in this study were the Symptom Severity, Symptom Interference and the Sleep Disturbance scales for patients with cancer. Data were analyzed using descriptive statistics, t-test, ANOVA, Pearson correlation coefficients and multiple regression with the SPSS/WIN 20.0 program. Results: The Sleep Disturbance for cancer patients showed a significant relationship with Symptom Interference and cancer stage. The significant factors influencing Sleep Disturbance were Symptom Severity and Symptom Interference. They explained 40.5% of the variance in stage IV. Conclusion: Patients with cancer experienced Symptom Severity and Symptom Interference which led to a negative effect on Sleep Disturbance. The results suggest that intervention programs to reduce Symptom Severity, Symptom Interference could improve Sleep Disturbance for cancer patients.

P01-184 - Comparative effects of pregabalin on anxiety and sleep disturbance: Results of a path analysis

IntroductionSleep disturbance is one of the key DSM-IV criteria for generalized anxiety disorder (GAD), and represents the chief complaint in approximately one-third of patients presenting in the primary care setting.Objectives/aimsTo evaluate the extent to which improvement in anxiety is a direct effect of treatment with pregabalin, or is an indirect effect mediated by improvement in sleep disturbance, and vice-versa.MethodsData were pooled from 4 double-blind, placebo-controlled (n = 406) short-term trials of pregabalin (all doses combined; n = 853) in the treatment of generalized anxiety disorder (GAD). The effect of treatment on anxiety was measured using the Hamilton Anxiety Rating Scale (HAM-A), effect of treatment on sleep disturbance was measured using the 3-item Hamilton Depression Rating Scale (HAM-D) sleep factor. Path analyses, using a set of multivariate regression models, were used to evaluate the reciprocal effects of pregabalin on improvement in anxiety in the presence of improvement in sleep disturbance, and vice-versa.ResultsSleep disturbance was common in this GAD sample, with 51.2% (placebo) and 52.2% (pregabalin) of patients, respectively, reporting moderate-to-severe insomnia (HAM-D sleep factor score ≥3). The results of the path analysis indicated that 91.7% (P < 0.0001) of improvement in anxiety was a direct effect of treatment with pregabalin, while 8.3% of improvement in anxiety was an indirect effect, mediated by improvement in sleep disturbance.ConclusionsIn this pooled 4-study data set, the anxiolytic efficacy of pregabalin appears to be primarily a direct effect, with only a small (8.3%) indirect effect, mediated by improvement in sleep disturbance.

The Value of a Mandibular Repositioning Appliance for the Treatment of Nonapneic Snoring

In this evidence-based case report, the authors addressed the following clinical question: What is the effect of a mandibular repositioning appliance (MRA) in patients with nonapneic snoring on the snoring loudness, partners' sleep disturbance, and quality of life? The authors retrieved relevant publications from Embase, PubMed, Cinahl, CENTRAL, and Web of Science. They used title and abstract field searches with relevant synonyms for the domain, patients with nonapneic snoring, and for the determinant, MRA. The search yielded 499 records. After selection based on relevance and validity, 2 articles remained for answering the authors' clinical question. The authors pooled the data for the level of snoring. MRA as compared to placebo resulted in a reduction of snoring loudness in 38% of patients with nonapneic snoring and in an improvement of sleep disturbance in 54% of the partners. No effect on quality of life and daytime sleepiness of partners was found. Furthermore, evidence for sustained long-term effects and complete recovery is lacking.

Endogenous Opiates in the Nucleus Tractus Solitarius Mediate Electroacupuncture‐Induced Sleep Activities in Rats

Electroacupuncture (EA) possesses various therapeutic effects, including alleviation of pain, reduction of inflammation and improvement of sleep disturbance. The mechanisms of EA on sleep improvement, however, remain to be determined. It has been stated in ancient Chinese literature that the Anmian (EX17) acupoint is one of the trigger points that alleviates insomnia. We previously demonstrated that EA stimulation of Anmian acupoints in rats during the dark period enhances non-rapid eye movement (NREM) sleep, which involves the induction of cholinergic activity in the nucleus tractus solitarius (NTS). In addition to cholinergic activation of the NTS, activation of the endogenous opioidergic system may also be a mechanism by which acupuncture affects sleep. Therefore, this study was designed to investigate the involvement of the NTS opioidergic system in EA-induced alterations in sleep. Our present results indicate that EA of Anmian acupoints increased NREM sleep, but not rapid eye movement sleep, during the dark period in rats. This enhancement in NREM sleep was dose-dependently blocked by microinjection of opioid receptor antagonist, naloxone, and the μ-opioid receptor antagonist, naloxonazine, into the NTS; administrations of δ-receptor antagonist, natrindole, and the κ-receptor antagonist, nor-binaltrophimine, however, did not affect EA-induced alterations in sleep. Furthermore, β-endorphin was significantly increased in both the brainstem and hippocampus after the EA stimuli, an effect blocked by administration of the muscarinic antagonist scopolamine into the NTS. Our findings suggest that mechanisms of EA-induced NREM sleep enhancement may be mediated, in part, by cholinergic activation, stimulation of the opiodergic neurons to increase the concentrations of β-endorphin and the involvement of the μ-opioid receptors.

Efficacy and safety of pregabalin for treating neuropathic pain associated with diabetic peripheral neuropathy: a 14 week, randomized, double‐blind, placebo‐controlled trial

To evaluate the efficacy, safety and pharmacokinetics of pregabalin in treating neuropathic pain associated with diabetic peripheral neuropathy in Japanese patients. A randomized, double-blind, placebo-controlled, multicentre 14 week clinical trial was conducted. Japanese patients with diabetic peripheral neuropathy (n = 317) were randomized to receive placebo or pregabalin at 300 or 600 mg/day. The primary efficacy measure was a change of mean pain score from baseline to end-point from patients' daily pain diaries. Significant reductions in pain were observed in patients treated with pregabalin at 300 and 600 mg/day vs. placebo (P < 0.05). Improvements in weekly pain scores were observed as early as week 1 and were sustained throughout the study period (300 and 600 mg/day difference from placebo at study end-point, -0.63 and -0.74, respectively). Pregabalin produced significant improvements in weekly sleep interference scores, the short-form McGill Pain Questionnaire, the Medical Outcomes Study-Sleep Scale, the 36-item Short-Form Health Survey scale, and the Patient and Clinical Global Impression of Change. Patient impressions of numbness, pain and paraesthesia were also significantly improved. Regarding treatment responders, 29.1 and 35.6% of patients treated with 300 and 600 mg/day, respectively, reported ≥ 50% improvement in mean pain scores (vs. 21.5% for placebo). Pregabalin was well tolerated; somnolence (26%), dizziness (24%), peripheral oedema (13%) and weight gain (11%) were the most common adverse events and generally were reported as mild to moderate. Pregabalin was effective in reducing pain and improving sleep disturbances due to pain, and was well tolerated in Japanese patients with painful DPN.

Open-Label Study on the Long-Term Efficacy, Safety, and Impact on Quality of Life of OROS Hydromorphone ER in Patients with Chronic Low Back Pain

To investigate the efficacy, safety, and impact on quality of life of long-term administration of OROS hydromorphone ER (8-128mg) in patients with chronic low back pain. A total of 113 adults with chronic low back pain who completed a 6-week open-label study were enrolled in this 6-month extension study. The primary end point was the daily pain relief rating obtained during monthly study visits. Secondary end points included Investigator and Patient Global Evaluations, Brief Pain Inventory scores obtained at monthly study visits, and quality-of-life measures (Medical Outcomes Study Questionnaire and 36-Item Short-Form Health Survey score) obtained at monthly intervals. Mean±SD change from baseline in pain relief with OROS hydromorphone ER for the Month 6 visit was 0.9±2.55 (P=0.0007) and for the last assessment of the extension study was 0.9±2.53 (P=0.0002). At the Month 6 visit, 81.3% of investigators and 71.0% of patients rated their satisfaction of pain relief with OROS hydromorphone ER treatment as good, very good, or excellent. Changes on the 36-item Short Form Health Survey, a quality-of-life measure, were statistically significant for the physical composite scores for all extension phase time points, including Month 6 (2.1±5.34; P<0.0001) and the last assessment (2.4±5.56; P<0.0001) and mental composite scores for all extension phase time points, including Month 6 (3.3±9.52; P=0.0006) and the last assessment (3.1±9.5; P=0.0008). Treatment with OROS hydromorphone ER also resulted in significant improvement in sleep disturbances. Adverse events included gastrointestinal and central nervous system symptoms. The results support the long-term use of OROS hydromorphone ER in managing chronic moderate to severe low back pain.

Investigation into the impact of abatacept on sleep quality in patients with rheumatoid arthritis, and the validity of the MOS-Sleep questionnaire Sleep Disturbance Scale

ObjectivesTo assess the impact of abatacept on sleep quality in patients with rheumatoid arthritis (RA), and the validity of the sleep disturbance scale of the Medical Outcomes Study Sleep Questionnaire...

Can Improving Sleep Influence Sleep-Disordered Breathing?

Sleep-disordered breathing (SDB) encompasses a group of disorders that include obstructive sleep apnoea (OSA), central sleep apnoea (CSA) and nocturnal hypoventilation. SDB commonly coexists with sleep disorders such as insomnia and restless legs syndrome, and sleep deprivation has been shown to play a role in the pathogenesis of SDB. Participants of a workshop, held at the 6th annual meeting of The International Sleep Disorders Forum: The Art of Good Sleep in 2008, evaluated whether the effective management of sleep disorders could result in a reduction in SDB. Following the workshop, a critical review of the literature in the field of sleep and SDB was conducted in order to assess the impact of improving sleep on SDB, and to determine whether measures taken to improve sleep result in a subsequent improvement in SDB. Results showed that studies evaluating the influence of improved sleep on respiratory abnormalities in patients with SDB are lacking. Studies in patients with OSA, with or without obesity-hypoventilation syndrome, show that therapy with continuous positive airways pressure and non-invasive ventilation improves sleep parameters with beneficial effects on SDB. Studies involving small numbers of patients have shown that the antidepressants fluoxetine and mirtazapine produce improvements in sleep parameters and the apnoea-hypopnoea index, and that acetazolamide may improve CSA. The benzodiazepines flurazepam, temazepam and nitrazepam, the hypnotic zolpidem, the melatonin receptor agonist ramelteon and gamma-hydroxybutyrate have all been shown to improve sleep, but are not associated with reductions or worsening in SDB. It is clear that there is a distinct knowledge gap with regard to the benefit of improving sleep disturbances for subsequent improvements in SDB. Randomized controlled clinical trials investigating the effect of pharmacological and non-pharmacological improvement of sleep disorders focusing on whether there is improvement in coexisting OSA/SDB are clearly needed. Furthermore, well-designed clinical trials investigating the role of hypnotic agents in improving SDB in certain phenotypes will enable the development of treatment recommendations for primary care physicians managing these patients in routine clinical practice.

Agomelatine: The evidence for its place in the treatment of depression.

Depressive disorders are among the main causes of disability due to disease. In spite of recent progress in the pharmacotherapy of depression, there is still a high nonresponse rate of approximately 30% to the first antidepressant treatment. Furthermore, the latency of several weeks until sufficient clinical improvement and the risk of side effects remain unresolved problems. Therefore, there is still further need for the development of new antidepressants. In the last years a variety of melatonin receptor agonists have been synthesized and evaluated for the treatment of sleep disorders. Animal studies suggested that agomelatine (S-20098), a synthetic melatonergic MT(1) and MT(2) receptor agonist with serotonin receptor antagonistic properties, may have additional activating properties and may represent a new approach in the treatment of depression. Clinical trials that have demonstrated efficacy and safety of agomelatine for the treatment of depression are reviewed. In clinical trials, including phase III studies, superior efficacy compared to placebo and good efficacy compared to standard antidepressants was shown for agomelatine for the acute treatment of major depression. In all studies published so far agomelatine was safe and the overall tolerability profile was superior to selective serotonin reuptake inhibitors or selective serotonin and norepinephrine reuptake inhibitors. Agomelatine may represent a novel perspective in the treatment of acute depression. The improvement of sleep disturbances, the tolerability in terms of sexual side effects, and the lack of withdrawal symptoms after abrupt discontinuation of treatment may represent important clinical benefits compared to established antidepressants.

M1890 Improvement in Sleep Disturbance in Patients with Persistent GERD Symptoms After a Change in Therapy: EncomPASS - a Cluster-Randomized Study in Primary Care

M1890 Improvement in Sleep Disturbance in Patients with Persistent GERD Symptoms After a Change in Therapy: EncomPASS - a Cluster-Randomized Study in Primary Care

Effects of cranial electrical stimulation on sleep disturbances, depressive symptoms, and caregiving appraisal in spousal caregivers of persons with Alzheimer's disease

Purpose The purpose of this work was to investigate the effects of cranial electrical stimulation (CES) on sleep disturbances, depressive symptoms, and caregiving appraisal. Methods Thirty-eight participants were randomly assigned to receive active CES or sham CES for 4 weeks. Results Both intervention groups demonstrated improvement in study measures from baseline scores. A trend toward statistically significant differences in daily sleep disturbances was found between the groups. No differences in depressive symptoms and caregiving appraisal were found between the groups. Conclusions These findings did not fully support the efficacy of the short-term use of active CES versus sham CES to improve sleep disturbances, depressive symptoms, or caregiving appraisal.

Exploratory Polysomnographic Evaluation of Pregabalin on Sleep Disturbance in Patients with Epilepsy

To evaluate the effects of adjunctive pregabalin 300 mg/day versus placebo on polysomnographic (PSG) variables in patients with well controlled partial seizures and subjectively reported sleep disturbance. An exploratory, 4-week, double-blind, randomized study in patients with well controlled partial seizures on AED monotherapy and subjective sleep disturbance over the previous 6 months. Mean changes from baseline to endpoint in PSG and subjective sleep variables (MOS Sleep Scale, Groningen Sleep Questionnaire) in patients on adjunctive pregabalin 300 mg/day (n=8) were compared with patients on placebo (n=7). Baseline PSGs showed sleep fragmentation. Mean sleep efficiency improved significantly in both treatment groups in the mean baseline to endpoint change; there was no significant between-group difference. Pregabalin treatment was associated with a significant reduction in number of awakenings (p = 0.02), and improvement in wake time after sleep onset approached significance (p = 0.055), suggesting improvement in sleep continuity that was not observed in the placebo group. Pregabalin was also associated with significant improvements in the MOS sleep disturbance and sleep quantity subscales compared with placebo (p < or =0.03). There were no changes in self-reported seizure control. This exploratory pilot study suggests that pregabalin may improve sleep continuity in patients with clinically relevant sleep disturbance. The effect on disturbed sleep appears independent of seizure control. The effects of pregabalin on disturbed sleep and seizures and their interrelationships warrant further study.

Sleep Disturbance in Adults With Posttraumatic Stress Disorder

To present a critical review of the literature and research on sleep difficulties in adults with posttraumatic stress disorder (PTSD), more specifically the existing treatment options, and to formulate recommendations regarding future treatment approaches and research related to sleep and PTSD. The following databases were consulted: PsycInfo (1872-2006) and MEDLINE (1966-2006). The search was conducted using the following key terms: PTSD and sleep, PTSD and nightmares, PTSD and dreams, PTSD and insomnia, PTSD and periodic limb movement disorder, and PTSD and sleep disordered breathing. Only studies examining sleep disturbance among adults with PTSD were included, and only articles written in English were consulted. Studies and reviews related to the prevalence, causes, and treatments of sleep disturbance among adults with PTSD, as well as those examining the relationship between sleep and PTSD, were selected. Promising treatment options are available for treating sleep difficulties among adults with PTSD. In particular, cognitive-behavioral therapy including a component for nightmares (imagery rehearsal therapy) and insomnia has been found to significantly improve sleep disturbance among these individuals. It is proposed that with the inclusion of other components, such as a screening for other sleep disorders, relaxation exercises, positive self-talk, imagery rehearsal related to recurring images before bed, and a daytime nap, sleep-related symptoms may improve to a greater degree, which may then lead to a significant decrease in other PTSD symptoms and overall PTSD severity. The inclusion of sleep medicine specialists should also be considered for sleep medicine treatment of individuals with PTSD. Collaboration between mental health professionals and sleep medicine specialists is therefore recommended for treatment of sleep-related difficulties among individuals with PTSD.

Improvement of Sleep Disturbance and Neurocognitive Function after Parathyroidectomy in Patients with Primary Hyperparathyroidism

To investigate the frequency of the nontraditional symptoms of sleep disturbance and impaired cognitive functioning in patients with primary hyper-parathyroidism (PHPT) and to assess changes in such patients after parathyroidectomy. In this study, we used formal neurocognitive assessment of patients undergoing parathyroidectomy for PHPT. The Brief Sleep Disturbance Inventory assessed sleep disturbance, and Stroop tests evaluated for cognitive impairment. Study patients underwent preoperative and postoperative neurocognitive testing. Fifty-five patients underwent neurocognitive evaluation; the 43 women and 12 men had a mean age of 63 years. Sleep disturbance was assessed in all 55 patients, whereas evaluation for cognitive impairment was performed in 47. Sleep disturbance was identified preoperatively in 24 (44%) of the 55 patients. This disorder affected 17 (31%) of 55 patients postoperatively (P<0.01). Impaired executive functioning was found at baseline in 6 (13%) of 47 patients and decreased to 1 (2%) of 47 post-operatively (P<0.01), whereas impaired cognitive processing speed was detected in 12 (26%) of 47 patients at baseline and decreased to 3 (6%) of 47 after parathyroidectomy (P<0.01). Eight patients did not meet the National Institutes of Health consensus statement criteria for parathyroidectomy; 4 of these patients had preoperative impairment of sleep or cognitive functioning, 3 of whom showed improvement postoperatively. Sleep disturbance and neurocognitive impairment occur in patients with PHPT, and these disorders improve after parathyroidectomy. Further objective evaluation of nontraditional symptoms in patients diagnosed as having PHPT is warranted.

Speed of Improvement in Sleep Disturbance and Anxiety Compared With Core Mood Symptoms During Acute Treatment of Depression in Old Age

The objective of this study was to examine the relative speed of improvement in sleep disturbance and anxiety symptoms compared with core mood symptoms in acute treatment of late-life major depression. The authors conducted secondary analysis of acute treatment data in 470 older patients treated in three federally funded studies. The authors compared rates of improvement in three Hamilton Rating Scale for Depression symptom clusters after stratification by study. Anxiety symptoms improved more slowly with antidepressant monotherapy and with combined pharmacotherapy/psychotherapy, whereas sleep symptoms improved at a similar rate as core mood symptoms. Anxiety symptoms tend to persist in patients with late-life depression.

SPA therapy in fibromyalgia: a randomised controlled clinic study

The aim of the present study is to evaluate the effectiveness of spa therapy in the management of fibromyalgia. Thirty women with fibromyalgia were randomly assigned to either a spa therapy group or a control group. The spa therapy group (n = 16) had spa treatment for 2 weeks in addition to their medical treatment. The control group (n = 14) continued to have their medical treatment and/or daily exercises. An investigator who was blinded for the intervention assessed all the patients for 9 months. Improvements in Fibromyalgia Impact Questionnaire (FIQ), pain and number of tender points were primary outcomes. Secondary outcome measures were improvement in sleep disturbance, fatigue, gastrointestinal symptoms, anxiety, Beck Depression Inventory and patient's global evaluation. the spa group was found to be superior to the control group at the end of intervention in terms of FIQ, pain, tender point count, fatigue and patients' global assessment. This superiority remained for 6 months in FIQ, 1 month in pain and tender point count. It was concluded that the addition of spa therapy to medical therapy has both short- and long-term beneficial effects in female patients with fibromyalgia.

Acute Intravenous Administration of Morphine Perturbs Sleep Architecture in Healthy Pain-Free Young Adults: a Preliminary Study

Pain is a leading cause of sleep disturbances in medical illness. Providing effective analgesia is considered an important intervention to reduce these sleep disturbances. Opioids remain the treatment of choice to relieve postoperative pain in hospitalized patients. However, their effects on sleep in pain patients or normal subjects remain unclear, as previous studies have been conducted mainly with former opioid addicts. The purpose of this investigation was to evaluate and describe the effects of acute clinical doses of morphine on sleep in healthy pain-free subjects. Subjects were randomly assigned to untreated (baseline), morphine (intravenous injections of 0.1 [DOSAGE ERROR CORRECTED] mg/kg), and placebo (intravenous injections of 0.9% NaCI) conditions. Sleep laboratory. Seven healthy pain-free, nonaddicts (5 women, 2 men; mean age = 25 +/- 1.6 years). Standard polysomnographic sleep and respiratory variables were measured during 3 experimental conditions. The treatment effect was analyzed with a Latin square cross-over design followed, when appropriate, by Tukey contrasts. Morphine altered sleep architecture by reducing slow-wave sleep (non-rapid eye movement stages 3-4) and rapid eye movement sleep, and by increasing non-rapid eye movement stage 2 sleep. Results did not reveal any statistical differences for other sleep and respiratory variables. Similar to earlier findings in animals, nondependent opiate addicts, and postoperative patients, morphine was found to reduce duration of slow-wave sleep. Unlike previous reports, however, its acute administration produced a moderate reduction in rapid eye movement sleep and did not increase correlates of arousal (ie, awakenings, electroencephalogram arousals, wake after sleep onset). Future studies should correlate these findings in patients with pain and evaluate whether optimal pain relief with opioid therapy can improve sleep disturbances in pain patients.

Sleep disturbances before and after parathyroidectomy for secondary hyperparathyroidism

The prevalence of insomnia in patients with symptomatic secondary hyperparathyroidism and the improvements of sleep disturbances after parathyroidectomy have not been previously reported. Thirty-one patients who had undergone successful total parathyroidectomy and autotransplantation for symptomatic secondary hyperparathyroidism were enrolled in the study. The symptoms of skin itching, bone pain, and general weakness were recorded. Preoperatively, serum levels of calcium, phosphorus, alkaline phosphatase (Alk-ptase), intact parathyroid hormone (iPTH), am melatonin (noon), and pm melatonin (midnight) were measured in association with a simple yes/no questionnaire of 5 items about sleep disturbances as described previously. The severity of insomnia was the sum of positive items of sleeping disturbances. The sleep hours per night and the habit of taking sleeping pills were also recorded. One week after surgery, serum levels of calcium, phosphorus, Alk-ptase, iPTH, am melatonin, and pm melatonin were measured again. Three months after surgery, symptoms of skin itching, bone pain, and general weakness were recorded, and serum levels of calcium, phosphorus, Alk-ptase and iPTH were measured in association with a yes/no questionnaire of sleep disturbances. The severity of insomnia, sleep hours per night, and the habit of taking sleeping pills were recorded again. One week after parathyroidectomy, serum levels of calcium, phosphorus, and iPTH decreased significantly; serum levels of Alk-ptase and am melatonin increased significantly; serum levels of pm melatonin did not change significantly. Three months after parathyroidectomy, symptoms of skin itching, bone pain, and general weakness decreased significantly; serum levels of calcium, phosphorus, Alk-ptase, and iPTH decreased significantly; sleeping disturbances and severity of insomnia improved significantly in association with longer sleep hours per night. A significant reduction of the habit of taking sleeping pills was also noted. Preoperatively, the severity of insomnia was correlated with skin itching, general weakness, and levels of iPTH. Postoperatively, the severity of insomnia was correlated with skin itching, general weakness, and bone pain. Preoperatively, a high prevalence of sleep disturbances (97%) was found in patients with symptomatic secondary hyperparathyroidism. We conclude that nocturnal melatonin levels do not change after parathyroidectomy; the improvements in sleep disturbance and the decreases in severity of insomnia are found 3 months after surgery in association with longer sleep hours per night. Decreases of symptoms such as skin itching, bone pain, and general weakness may be the reasons for the improvement in sleep and the decrease in insomnia.

Effects of electroacupuncture at 'Anmian (Extra)' acupoints on sleep activities in rats: the implication of the caud al nucleus tractus solitarius.

Electroacupuncture (EAc) possesses a broad therapeutic effect, including improvement of sleep disturbances. The mechanism of sleep improvement with EAc, however, is still unclear. The present study investigated the effects of EAc stimulation of 'Anmian (extra)' acupoints on sleep organization and the implication of an active structure, the caudal nucleus tractus solitarius (NTS). Rats were implanted with electroencephalogram (EEG) recording electrodes, and 32-gauge acupuncture needles were bilaterally inserted into 'Anmian (extra)' acupoints in the rats, followed by electrical stimulation for 20 min. Twenty-three-hour continuous EEGs were then recorded. Results showed that rapid eye movement sleep (REMS) was enhanced during the dark period when a single EAc stimulation was given 25 min prior to the onset of the dark period. REMS and slow-wave sleep (SWS) increased during the dark period after administration of EAc stimuli on 2 consecutive days. Electrical stimulation of non-acupoints produced no change in the sleep pattern. Pharmacological blockade of muscarinic cholinergic receptors by systemic administration of scopolamine dose-dependently attenuated EAc-induced changes in REMS and SWS. Furthermore, electrical lesions in the bilateral caudal NTS produced significant blockade of EAc-induced sleep enhancement. However, in rats without EAc, scopolamine increased SWS during the dark period, but caudal NTS lesions did not alter sleep. In addition, neither EAc nor scopolamine with EAc manipulation produced any change in the slow-wave activity (SWA) during SWS; however, the SWA during SWS was significantly reduced after caudal NTS lesion with EAc. These results suggest that the caudal NTS may be involved in the regulation of EAc-induced sleep alterations.

Effect of long-term melatonin administration on school-phobic children and adolescents with sleep disturbances

Melatonin is effective in treating sleep disturbances, which are closely related to school phobia. However, side effects of melatonin in long-term administration have not been examined fully. In the present study melatonin was administered to 30 patients with school phobia (18 females, 12 males; mean age, 14.8 years) who had no physical, psychiatric, or social problems, but had sleep disturbances. Patients were compared with 27 healthy, age-matched controls. No changes in serum 5-S-cysteinyldopa levels, human skin pigmentation, or the state of puberty were observed in either group. Melatonin appeared to lead to improvements in sleep disturbances.