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Chomanskis Ž, Jonkus V, Danielius T, Paulauskas T, Orvydaitė M, Melaika K, Rukšėnas O, Hendrixson V, Ročka S. Hypotensive Effect of Electric Stimulation of Caudal Ventrolateral Medulla in Freely Moving Rats. MEDICINA (KAUNAS, LITHUANIA) 2023; 59:1046. [PMID: 37374250 DOI: 10.3390/medicina59061046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Revised: 05/25/2023] [Accepted: 05/26/2023] [Indexed: 06/29/2023]
Abstract
Background and Objectives: An altered sympathetic function is established in primary arterial hypertension (PAH) development. Therefore, PAH could be targeted by applying an electric current to the medulla where reflex centers for blood pressure control reside. This study aims to evaluate the electric caudal ventrolateral medulla (CVLM) stimulation effect on blood pressure and animal survivability in a freely moving rat model. Materials and Methods: A total of 20 Wistar rats aged 12-16 weeks were randomly assigned to either: the experimental group (n = 10; electrode tip implanted in CVLM region) or the control group (n = 10; tip implanted 4 mm above the CVLM in the cerebellum). After a period of recovery (4 days), an experimental phase ensued, divided into an "OFF stimulation" period (5-7 days post-surgery) and an "ON stimulation" period (8-14 days post-surgery). Results: Three animals (15%, one in the control, two in the experimental group) dropped out due to postoperative complications. Arterial pressure in the experimental group rats during the "OFF stimulation" period decreased by 8.23 mm Hg (p = 0.001) and heart rate by 26.93 beats/min (p = 0.008). Conclusions: From a physiological perspective, CVLM could be an effective deep brain stimulation (DBS) target for drug-resistant hypertension: able to influence the baroreflex arc directly, having no known direct integrative or neuroendocrine function. Targeting the baroreflex regulatory center, but not its sensory or effector parts, could lead to a more predictable effect and stability of the control system. Although targeting neural centers in the medullary region is considered dangerous and prone to complications, it could open a new vista for deep brain stimulation therapy. A possible change in electrode design would be required to apply CVLM DBS in clinical trials in the future.
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Affiliation(s)
- Žilvinas Chomanskis
- Clinic of Neurology and Neurosurgery, Faculty of Medicine, Vilnius University, LT-01513 Vilnius, Lithuania
| | - Vytautas Jonkus
- Faculty of Physics, Vilnius University, LT-01513 Vilnius, Lithuania
| | - Tadas Danielius
- Institute of Applied Mathematics, Faculty of Mathematics and Informatics, Vilnius University, LT-01513 Vilnius, Lithuania
| | - Tomas Paulauskas
- Department of Neurobiology and Biophysics, Institute of Biosciences, Life Sciences Center, Vilnius University, LT-01513 Vilnius, Lithuania
| | - Monika Orvydaitė
- Faculty of Medicine, Vilnius University, LT-01513 Vilnius, Lithuania
| | | | - Osvaldas Rukšėnas
- Department of Neurobiology and Biophysics, Institute of Biosciences, Life Sciences Center, Vilnius University, LT-01513 Vilnius, Lithuania
| | - Vaiva Hendrixson
- Department of Physiology, Biochemistry, Microbiology and Laboratory Medicine, Institute of Biomedical Sciences, Faculty of Medicine, Vilnius University, LT-01513 Vilnius, Lithuania
| | - Saulius Ročka
- Clinic of Neurology and Neurosurgery, Faculty of Medicine, Vilnius University, LT-01513 Vilnius, Lithuania
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Hamasaki T, Yamakawa T, Fujiwara K, Harashima H, Nakamura K, Ikuta Y, Yamamoto T, Hasegawa Y, Takezaki T, Mukasa A. Sympathetic hyperactivity, hypertension, and tachycardia induced by stimulation of the ponto-medullary junction in humans. Clin Neurophysiol 2021; 132:1264-1273. [PMID: 33867252 DOI: 10.1016/j.clinph.2021.03.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 02/01/2021] [Accepted: 03/06/2021] [Indexed: 10/21/2022]
Abstract
OBJECTIVE The purpose of this study is to investigate changes in autonomic activities and systemic circulation generated by surgical manipulation or electrical stimulation to the human brain stem. METHODS We constructed a system that simultaneously recorded microsurgical field videos and heart rate variability (HRV) that represent autonomic activities. In 20 brain stem surgeries recorded, HRV features and sites of surgical manipulation were analyzed in 19 hypertensive epochs, defined as the periods with transient increases in the blood pressure. We analyzed the period during electrical stimulation to the ponto-medullary junction, performed for the purpose of monitoring a cranial nerve function. RESULTS In the hypertensive epoch, HRV analysis showed that sympathetic activity predominated over the parasympathetic activity. The hypertensive epoch was more associated with surgical manipulation of the area in the caudal pons or the rostral medulla oblongata compared to controls. During the period of electrical stimulation, there were significant increases in blood pressures and heart rates, accompanied by sympathetic overdrive. CONCLUSIONS Our results provide physiological evidence that there is an important autonomic center located adjacent to the ponto-medullary junction. SIGNIFICANCE A large study would reveal a candidate target of neuromodulation for disorders with autonomic imbalances such as drug-resistant hypertension.
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Affiliation(s)
- Tadashi Hamasaki
- Department of Neurosurgery, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan.
| | - Toshitaka Yamakawa
- Priority Organization for Innovation and Excellence, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-0862, Japan
| | - Koichi Fujiwara
- Department of Material Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8601, Japan
| | - Haruki Harashima
- Priority Organization for Innovation and Excellence, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-0862, Japan
| | - Kota Nakamura
- Priority Organization for Innovation and Excellence, Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto 860-0862, Japan
| | - Yoshihiro Ikuta
- Department of Anesthesiology, Kumamoto University Hospital, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Tatsuo Yamamoto
- Department of Anesthesiology, Kumamoto University Hospital, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Yu Hasegawa
- Department of Occupational Therapy, School of Health Sciences at Fukuoka, International University of Health and Welfare, 1-7-4 Momochihama, Sawara-ku, Fukuoka 814-0001, Japan
| | - Tatsuya Takezaki
- Department of Neurosurgery, Kumamoto University Hospital, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Akitake Mukasa
- Department of Neurosurgery, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
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Garbarino S, Lanteri P, Prada V, Falkenstein M, Sannita WG. Circadian Rhythms, Sleep, and Aging. J PSYCHOPHYSIOL 2020. [DOI: 10.1027/0269-8803/a000267] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Abstract. Circadian mechanisms and the sleep-wakefulness rhythms guarantee survival, adaptation, efficient action in everyday life or in emergencies and well-being. Disordered circadian processes at central and/or cellular levels, sleep disorders, and unhealthy wakefulness/sleep rhythms can impair the physiological circadian organization and result in subjective, professional, or behavioral changes ranging from functional inadequacy to higher risks at work or on the road to medical relevance. Circadian rhythms and the sleep organization change ontogenetically; major changes result from normal aging and from the multiple diseases that are often associated. There are circular functional interactions involving sleep/sleep disorders, the autonomic and immune systems, and the functional changes in the circadian system due to aging that deserve attention but have been overlooked thus far.
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Affiliation(s)
- Sergio Garbarino
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics and Maternal/Child Sciences, University of Genova, Polyclinic Hospital San Martino IRCCS, Genova, Italy
| | - Paola Lanteri
- Department of Diagnostics and Applied Technology, Neurophysiopathology Center, Fondazione IRCCS, Istituto Neurologico C. Besta, Milano, Italy
| | - Valeria Prada
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics and Maternal/Child Sciences, University of Genova, Polyclinic Hospital San Martino IRCCS, Genova, Italy
| | | | - Walter G. Sannita
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics and Maternal/Child Sciences, University of Genova, Polyclinic Hospital San Martino IRCCS, Genova, Italy
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Liu SH, Lai CT, Chen HR, Lin WL, Yamada S, Lugtu IC, Chou YH, Yang CC, Kuo TBJ, Chen SA, Lo LW. The Impact of Estrogen Supplementation to Autonomic and Sleep Modulations in Free-Moving Spontaneously Hypertensive Rats. Int Heart J 2020; 61:128-137. [DOI: 10.1536/ihj.19-297] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Shin-Huei Liu
- Division of Cardiology, Taipei Veterans General Hospital
| | - Chun-Ting Lai
- Institute of Brain Science, National Yang-Ming University
- Sleep Research Center, National Yang-Ming University
| | | | - Wei-Lun Lin
- Division of Cardiology, Taipei Veterans General Hospital
- Institute of Clinical Medicine, and Cardiovascular Research Institute, National Yang-Ming University
| | - Shinya Yamada
- Division of Cardiology, Taipei Veterans General Hospital
| | | | - Yu-Hui Chou
- Division of Cardiology, Taipei Veterans General Hospital
| | - Cheryl C.H. Yang
- Institute of Brain Science, National Yang-Ming University
- Sleep Research Center, National Yang-Ming University
| | - Terry Bo-Jau Kuo
- Institute of Brain Science, National Yang-Ming University
- Sleep Research Center, National Yang-Ming University
- Digital Medicine Center, National Yang-Ming University
| | - Shih-Ann Chen
- Division of Cardiology, Taipei Veterans General Hospital
- Institute of Clinical Medicine, and Cardiovascular Research Institute, National Yang-Ming University
| | - Li-Wei Lo
- Division of Cardiology, Taipei Veterans General Hospital
- Institute of Clinical Medicine, and Cardiovascular Research Institute, National Yang-Ming University
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Steuer I, Guertin PA. Central pattern generators in the brainstem and spinal cord: an overview of basic principles, similarities and differences. Rev Neurosci 2019; 30:107-164. [PMID: 30543520 DOI: 10.1515/revneuro-2017-0102] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 03/30/2018] [Indexed: 12/11/2022]
Abstract
Central pattern generators (CPGs) are generally defined as networks of neurons capable of enabling the production of central commands, specifically controlling stereotyped, rhythmic motor behaviors. Several CPGs localized in brainstem and spinal cord areas have been shown to underlie the expression of complex behaviors such as deglutition, mastication, respiration, defecation, micturition, ejaculation, and locomotion. Their pivotal roles have clearly been demonstrated although their organization and cellular properties remain incompletely characterized. In recent years, insightful findings about CPGs have been made mainly because (1) several complementary animal models were developed; (2) these models enabled a wide variety of techniques to be used and, hence, a plethora of characteristics to be discovered; and (3) organizations, functions, and cell properties across all models and species studied thus far were generally found to be well-preserved phylogenetically. This article aims at providing an overview for non-experts of the most important findings made on CPGs in in vivo animal models, in vitro preparations from invertebrate and vertebrate species as well as in primates. Data about CPG functions, adaptation, organization, and cellular properties will be summarized with a special attention paid to the network for locomotion given its advanced level of characterization compared with some of the other CPGs. Similarities and differences between these networks will also be highlighted.
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Affiliation(s)
- Inge Steuer
- Neuroscience Unit, Laval University Medical Center (CHUL - CHU de Québec), 2705 Laurier Blvd, Quebec City, Quebec G1V 4G2, Canada
| | - Pierre A Guertin
- Neuroscience Unit, Laval University Medical Center (CHUL - CHU de Québec), 2705 Laurier Blvd, Quebec City, Quebec G1V 4G2, Canada
- Faculty of Medicine, Department of Psychiatry and Neurosciences, Laval University, Quebec City, Quebec G1V 0A6, Canada
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Dergacheva O, Mendelowitz D. Combined hypoxia and hypercapnia, but not hypoxia alone, suppresses neurotransmission from orexin to hypothalamic paraventricular spinally-projecting neurons in weanling rats. Brain Res 2017; 1679:33-38. [PMID: 29162453 DOI: 10.1016/j.brainres.2017.11.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 11/03/2017] [Accepted: 11/16/2017] [Indexed: 12/30/2022]
Abstract
Both orexin neurons in the lateral hypothalamus and spinally-projecting pre-sympathetic neurons (PSNs) in the paraventricular nucleus of the hypothalamus (PVN) play an important role in the regulation of cardiovascular function under normal conditions and during cardiovascular challenges such as hypoxia and/or hypercapnia. We have previously established, using selective optogenetic excitation of orexin neurons and pathways, there is a heterogeneous neurotransmission from orexin neurons to PSNs in the PVN. This study was undertaken to test whether this pathway is altered by acute exposure to hypoxia alone and/or combined hypoxia and hypercapnia (H/H). To test this hypothesis, we selectively expressed channelrhodopsin-2 (ChR2) in orexin neurons in the lateral hypothalamus and photoactivated ChR2-expressing fibers to evoke postsynaptic currents in spinally-projecting PSNs in an in vitro slice preparation in rats. In accordance with previously published data, two subpopulations of spinally-projecting PSNs were established, including those with glutamatergic or GABAergic inputs from orexin neurons. Hypoxia alone did not alter the peak amplitude of either glutamatergic or GABAergic neurotransmission, however, H/H significantly inhibited both glutamatergic and GABAergic neurotransmission from orexin neurons to SPNs. In conclusion, H/H may modulate cardiovascular function by affecting heterogeneous pathways from orexin neurons to spinally-projecting PSNs in the PVN.
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Affiliation(s)
- Olga Dergacheva
- *Department of Pharmacology and Physiology, The George Washington University, 2300 Eye Street, NW, Washington, DC 20037, USA.
| | - David Mendelowitz
- *Department of Pharmacology and Physiology, The George Washington University, 2300 Eye Street, NW, Washington, DC 20037, USA
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Kishi A, Van Dongen HPA, Natelson BH, Bender AM, Palombini LO, Bittencourt L, Tufik S, Ayappa I, Rapoport DM. Sleep continuity is positively correlated with sleep duration in laboratory nighttime sleep recordings. PLoS One 2017; 12:e0175504. [PMID: 28394943 PMCID: PMC5386280 DOI: 10.1371/journal.pone.0175504] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2016] [Accepted: 03/26/2017] [Indexed: 11/18/2022] Open
Abstract
Sleep duration varies widely across individuals and appears to be trait-like. Differences in the stability of underlying sleep processes may underlie this phenomenon. To investigate underlying mechanisms, we examined the relationship between sleep duration and sleep continuity in baseline polysomnography (PSG) recordings from three independently collected datasets: 1) 134 healthy controls (ages 37 ± 13 years) from the São Paulo Epidemiologic Sleep Study, who spent one night in a sleep laboratory, 2) 21 obstructive sleep apnea (OSA) patients who were treated with continuous positive airway pressure for at least 2 months (45 ± 12 years, respiratory disturbance index <15), who spent one night in a sleep laboratory with previous experience of multiple PSG studies, and 3) 62 healthy controls (28 ± 6 years) who, as part of larger experiments, spent 2 consecutive nights in a sleep laboratory. For each dataset, we used total sleep time (TST) to separate subjects into those with shorter sleep (S-TST) and those with longer sleep (L-TST). In all three datasets, survival curves of continuous sleep segments showed greater sleep continuity in L-TST than in S-TST. Correlation analyses with TST as a continuous variable corroborated the results; and the results also held true after controlling for age. There were no significant differences in baseline waking performance and sleepiness between S-TST and L-TST. In conclusion, in both healthy controls and treated OSA patients, sleep continuity was positively correlated with sleep duration. These findings suggest that S-TST may differ from L-TST in processes underlying sleep continuity, shedding new light on mechanisms underlying individual differences in sleep duration.
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Affiliation(s)
- Akifumi Kishi
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, New York University School of Medicine, New York, New York, United States of America
- Pain & Fatigue Study Center, Beth Israel Medical Center and Albert Einstein College of Medicine, New York, New York, United States of America
- Graduate School of Education, The University of Tokyo, Tokyo, Japan
- * E-mail:
| | - Hans P. A. Van Dongen
- Sleep and Performance Research Center, Washington State University, Spokane, Washington, United States of America
| | - Benjamin H. Natelson
- Pain & Fatigue Study Center, Beth Israel Medical Center and Albert Einstein College of Medicine, New York, New York, United States of America
| | - Amy M. Bender
- Sleep and Performance Research Center, Washington State University, Spokane, Washington, United States of America
| | - Luciana O. Palombini
- Disciplina de Medicina e Biologia do Sono, Departamento de Psicobiologia, Universidade Federal de São Paulo, São Paulo, São Paulo, Brazil
| | - Lia Bittencourt
- Disciplina de Medicina e Biologia do Sono, Departamento de Psicobiologia, Universidade Federal de São Paulo, São Paulo, São Paulo, Brazil
| | - Sergio Tufik
- Disciplina de Medicina e Biologia do Sono, Departamento de Psicobiologia, Universidade Federal de São Paulo, São Paulo, São Paulo, Brazil
| | - Indu Ayappa
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, New York University School of Medicine, New York, New York, United States of America
| | - David M. Rapoport
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, New York University School of Medicine, New York, New York, United States of America
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Lai CT, Chen CY, Kuo TBJ, Chern CM, Yang CCH. Sympathetic Hyperactivity, Sleep Fragmentation, and Wake-Related Blood Pressure Surge During Late-Light Sleep in Spontaneously Hypertensive Rats. Am J Hypertens 2016; 29:590-7. [PMID: 26350298 DOI: 10.1093/ajh/hpv154] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2015] [Accepted: 08/13/2015] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Many cardiovascular disease events occur before morning awaking and are more severe in hypertensive patients. Sleep-related cardiovascular regulation has been suggested to play an important role in the pathogenesis. In this study, we explored whether such impairments are exaggerated during late sleep (before the active phase) in spontaneously hypertensive rats (SHRs). METHODS Polysomnographic recording was performed through wireless transmission in freely moving SHRs and Wistar-Kyoto rats (WKYs) over 24 hours. The SHRs were injected with saline and an α1-adrenergic antagonist (prazosin: 5 mg/kg) on 2 separate days. Cardiovascular and autonomic functions were assessed by cardiovascular variability and spontaneous baroreflex analysis. RESULTS Compared with the early-light period (Zeitgeber time (ZT) 0-6 hours), both the WKYs and SHRs during the late-light period (ZT 6-12 hours) showed sleep fragmentation, sympathovagal imbalance, and baroreflex impairment, which were exaggerated and more advanced in the SHRs. Like the morning blood pressure (BP) surge in humans, we found that there was a wake-related blood pressure surge (WBPS) during the late-light period in both groups of rats. The WBPS was also greater and occurred earlier in the SHRs, and was accompanied by a surge in vascular sympathetic index. Under α1-adrenergic antagonism, the late-light period-related sleep fragmentation and BP surge in the SHRs were partially reversed. CONCLUSIONS Our results reveal that sleep-related sympathetic overactivity, baroreflex sensitivity impairment, WBPS, and sleep fragmentation in SHRs deteriorates during the late-light period can be partially alleviated by treatment with an α1-adrenoceptor antagonist.
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Affiliation(s)
- Chun-Ting Lai
- Sleep Research Center, National Yang-Ming University, Taipei, Taiwan; Institute of Brain Science, National Yang-Ming University, Taipei, Taiwan
| | - Chun-Yu Chen
- Sleep Research Center, National Yang-Ming University, Taipei, Taiwan; Institute of Brain Science, National Yang-Ming University, Taipei, Taiwan
| | - Terry B J Kuo
- Sleep Research Center, National Yang-Ming University, Taipei, Taiwan; Institute of Brain Science, National Yang-Ming University, Taipei, Taiwan; Brain Research Center, National Yang-Ming University, Taipei, Taiwan; Department of Education and Research, Taipei City Hospital, Taipei, Taiwan; Research Center for Adaptive Data Analysis, National Central University, Taoyuan, Taiwan; Chief of Division of Translational Medicine, Stroke & Neurovascular Center, Veterans General Hospital, Taipei, Taiwan
| | - Chang-Ming Chern
- Sleep Research Center, National Yang-Ming University, Taipei, Taiwan; Institute of Brain Science, National Yang-Ming University, Taipei, Taiwan; Chief of Division of Translational Medicine, Stroke & Neurovascular Center, Veterans General Hospital, Taipei, Taiwan
| | - Cheryl C H Yang
- Sleep Research Center, National Yang-Ming University, Taipei, Taiwan; Institute of Brain Science, National Yang-Ming University, Taipei, Taiwan; Brain Research Center, National Yang-Ming University, Taipei, Taiwan; Department of Education and Research, Taipei City Hospital, Taipei, Taiwan;
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Kuo TBJ, Li JY, Kuo HK, Chern CM, Yang CCH. Differential changes and interactions of autonomic functioning and sleep architecture before and after 50 years of age. AGE (DORDRECHT, NETHERLANDS) 2016; 38:5. [PMID: 26728397 PMCID: PMC5005895 DOI: 10.1007/s11357-015-9863-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Accepted: 12/07/2015] [Indexed: 06/05/2023]
Abstract
We hypothesize that the time when age-related changes in autonomic functioning and in sleep structure occur are different and that autonomic functioning modulates sleep architecture differently before and after 50 years of age. Sixty-eight healthy subjects (aged 20 to 79 years old, 49 of them women) were enrolled. Correlation analysis revealed that wake after sleep onset, the absolute and relative value of stage 1 (S1; S1%), and relative value of stage 2 (S2) were positively correlated with age; however, sleep efficiency, stage 3 (S3), S3%, and rapid-eye-movement latency (REML) were negatively correlated with age. Significant degenerations of sleep during normal aging were occurred after 50 years of age; however, significant declines of autonomic activity were showed before 50 years of age. Before 50 years of age, vagal function during sleep was negatively correlated with arousal index; however, after 50 years of age, it was positively correlated with S1 and S1%. In addition, sympathetic activity during wake stage was positively related to S2% only after 50 years of age. Our results imply that the age-related changes in autonomic functioning decline promptly as individuals leave the younger part of their adult life span and that age-related changes in sleep slowly develop as individuals enter the older part of their adult life span. Furthermore, while various aspects of sleep architecture are modulated by both the sympathetic and vagal nervous systems during adult life span, the sleep quality is mainly correlated with the sympathetic division after 50 years of age.
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Affiliation(s)
- T B J Kuo
- Institute of Brain Science, National Yang-Ming University, No. 155, Sec. 2, Li-Nong St., Taipei, 11221, Taiwan
- Sleep Research Center, National Yang-Ming University, No. 155, Sec. 2, Li-Nong St., Taipei, 11221, Taiwan
- Department of Education and Research, Taipei City Hospital, Taipei, Taiwan
- Division of Translational Medicine, Stroke & Neurovascular Center, Taipei Veterans General Hospital, Taipei, Taiwan
- Brain Research Center, National Yang-Ming University, Taipei, Taiwan
- Institute of Translational and Interdisciplinary Medicine, National Central University, Taoyuan, Taiwan
- Department of Neurology, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Jia-Yi Li
- Institute of Brain Science, National Yang-Ming University, No. 155, Sec. 2, Li-Nong St., Taipei, 11221, Taiwan
- Sleep Research Center, National Yang-Ming University, No. 155, Sec. 2, Li-Nong St., Taipei, 11221, Taiwan
- Department of Health and Leisure Management, Yuanpei University of Medical Technology, Hsinchu, Taiwan
| | - Hsu-Ko Kuo
- Department of Geriatrics and Gerontology and Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Chang-Ming Chern
- Institute of Brain Science, National Yang-Ming University, No. 155, Sec. 2, Li-Nong St., Taipei, 11221, Taiwan
- Sleep Research Center, National Yang-Ming University, No. 155, Sec. 2, Li-Nong St., Taipei, 11221, Taiwan
- Division of Translational Medicine, Stroke & Neurovascular Center, Taipei Veterans General Hospital, Taipei, Taiwan
- Brain Research Center, National Yang-Ming University, Taipei, Taiwan
- Department of Neurology, Taipei Veterans General Hospital, Taipei, Taiwan
| | - C C H Yang
- Institute of Brain Science, National Yang-Ming University, No. 155, Sec. 2, Li-Nong St., Taipei, 11221, Taiwan.
- Sleep Research Center, National Yang-Ming University, No. 155, Sec. 2, Li-Nong St., Taipei, 11221, Taiwan.
- Department of Education and Research, Taipei City Hospital, Taipei, Taiwan.
- Brain Research Center, National Yang-Ming University, Taipei, Taiwan.
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Kuo TBJ, Chen CY, Hsu YC, Yang CCH. EEG beta power and heart rate variability describe the association between cortical and autonomic arousals across sleep. Auton Neurosci 2015; 194:32-7. [PMID: 26681575 DOI: 10.1016/j.autneu.2015.12.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2015] [Revised: 10/17/2015] [Accepted: 12/02/2015] [Indexed: 10/22/2022]
Abstract
Cortical and autonomic arousals have been found to be closely associated. As arousal events are not evenly dispersed across sleep, we hypothesized the relationship between high frequency electroencephalogram (EEG) power and autonomic arousal indices differ between non-rapid eye movement (NREM) and rapid eye movement (REM) sleep. One night of polysomnographic recording was performed on a group of 18 subjects using a portable recorder. The EEG was collected from C3/Fz. Sleep stages and cortical arousals were visually scored. Cardiac autonomic modulation was assessed from heart rate variability, where the high frequency power (HF) indicates parasympathetic modulation, and the low frequency to high frequency power ratio (LF/HF) represents sympathetic modulation. During NREM sleep, EEG beta power was significantly correlated with LF/HF (r=0.40 ± 0.06), and the relationships were more positive than during REM sleep (LF/HF: r=0.20 ± 0.08; EOG power: r=-0.13 ± 0.05). The relationship of beta power with LF/HF was associated with the incidence of cortical arousal, particularly during NREM sleep. With respect to alpha power, it was only marginally related to HF or LF/HF. In addition, the coefficients of determination were lower for alpha power than for beta power in terms of the relationships to HF, LF/HF and EOG power. This study shows a higher relationship between cortical and autonomic activation during NREM sleep, and the association is better described by beta power. This finding suggests NREM sleep may be of greater therapeutic potential in view of reducing cardiovascular disease associated with sleep fragmentation, and beta power may provide a better index to evaluate the effect.
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Affiliation(s)
- Terry B J Kuo
- Institute of Brain Science, National Yang-Ming University, Taipei, Taiwan; Sleep Research Center, National Yang-Ming University, Taipei, Taiwan; Department of Education and Research, Taipei City Hospital, Taipei, Taiwan; Institute of Translational and Interdisciplinary Medicine, National Central University, Taoyuan, Taiwan
| | - Chun-Yu Chen
- Institute of Brain Science, National Yang-Ming University, Taipei, Taiwan; Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Ya-Chuan Hsu
- Institute of Brain Science, National Yang-Ming University, Taipei, Taiwan
| | - Cheryl C H Yang
- Institute of Brain Science, National Yang-Ming University, Taipei, Taiwan; Sleep Research Center, National Yang-Ming University, Taipei, Taiwan; Department of Education and Research, Taipei City Hospital, Taipei, Taiwan.
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11
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Bidirectional interactions between the baroreceptor reflex and arousal: an update. Sleep Med 2015; 16:210-6. [DOI: 10.1016/j.sleep.2014.10.011] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2014] [Revised: 09/15/2014] [Accepted: 10/08/2014] [Indexed: 11/23/2022]
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12
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