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Embang JEG, Tan YHV, Ng YX, Loyola GJP, Wong LW, Guo Y, Dong Y. Role of sleep and neurochemical biomarkers in synaptic plasticity related to neurological and psychiatric disorders: A scoping review. J Neurochem 2025; 169:e16270. [PMID: 39676063 DOI: 10.1111/jnc.16270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2024] [Revised: 10/23/2024] [Accepted: 10/29/2024] [Indexed: 12/17/2024]
Abstract
Sleep is vital for maintaining physical and mental well-being, impacting cognitive functions like memory and learning through neuroplasticity. Sleep disturbances prevalent in neurological and psychiatric disorders exacerbate cognitive decline, imposing societal burdens. Exploring the relationship between sleep and neuroplasticity elucidates the mechanisms influencing cognition, particularly amidst the prevalent sleep disturbances in these clinical populations. While existing reviews provide valuable insights, gaps remain in understanding the neurophysiological mechanisms underlying sleep and cognitive function. This scoping review aims to investigate the characteristic patterns of sleep parameters and neurochemical biomarkers in reflecting neuroplasticity changes related to neurological and psychiatric disorders and to explore how these markers interact and influence cognition at the molecular level. Studies involving adults and older adults were included, excluding animal models and the paediatric population. Selected studies explored the relationship between sleep parameter or neurochemical biomarker changes and cognitive impairment, reflecting underlying neuroplasticity changes. Peer-reviewed articles, clinical trials, theses, and dissertations in English were included while excluding secondary research and non-peer-reviewed sources. A three-step search strategy was executed following the updated Joanna Briggs Institute methodology for scoping reviews. Published studies were retrieved from nine databases, grey literature, expert recommendations, and hand-searching of the included studies' bibliography. A basic qualitative content synthesis of 34 studies was conducted per JBI's scoping review guidance. Slow-wave and Rapid-Eye Movement sleep, sleep spindles, sleep cycle disruption, K-Complex(KC) density, Hippocampal sEEG, BDNF, IL-6, iNOS mRNA expression, plasma serotonin, CSF Aβ-42, t-tau and p-tau proteins, and serum cortisol revealed associations with cognitive dysfunction. Examining the relationship between sleep parameters, neurochemical biomarkers, and cognitive function reveals neuronal mechanisms that guide potential therapeutic interventions and enhance quality patient care.
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Affiliation(s)
- Johann Emilio Gonzales Embang
- Alice Lee Centre for Nursing Studies, Yong Loo Lin School of Medicine, National University of Singapore, Singapore City, Singapore
- Division of Nursing, National University Hospital, Singapore City, Singapore
- National University Health System, Singapore City, Singapore
| | - Ying Hui Valerie Tan
- Alice Lee Centre for Nursing Studies, Yong Loo Lin School of Medicine, National University of Singapore, Singapore City, Singapore
- Division of Nursing, National University Hospital, Singapore City, Singapore
- National University Health System, Singapore City, Singapore
| | - Yu Xuan Ng
- National University Health System, Singapore City, Singapore
- Division of Nursing, Alexandra Hospital, Singapore City, Singapore
| | - Gerard Jude Ponce Loyola
- College of Medicine, University of the Philippines, Manila, Philippines
- Philippine General Hospital, Manila, Philippines
| | - Lik-Wei Wong
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore City, Singapore
| | - Yuqing Guo
- Sue & Bill Gross School of Nursing, University of California, Irvine, California, USA
| | - Yanhong Dong
- Alice Lee Centre for Nursing Studies, Yong Loo Lin School of Medicine, National University of Singapore, Singapore City, Singapore
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Li Z, Wang J, Tang C, Wang P, Ren P, Li S, Yi L, Liu Q, Sun L, Li K, Ding W, Bao H, Yao L, Na M, Luan G, Liang X. Coordinated NREM sleep oscillations among hippocampal subfields modulate synaptic plasticity in humans. Commun Biol 2024; 7:1236. [PMID: 39354050 PMCID: PMC11445409 DOI: 10.1038/s42003-024-06941-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Accepted: 09/23/2024] [Indexed: 10/03/2024] Open
Abstract
The integration of hippocampal oscillations during non-rapid eye movement (NREM) sleep is crucial for memory consolidation. However, how cardinal sleep oscillations bind across various subfields of the human hippocampus to promote information transfer and synaptic plasticity remains unclear. Using human intracranial recordings from 25 epilepsy patients, we find that hippocampal subfields, including DG/CA3, CA1, and SUB, all exhibit significant delta and spindle power during NREM sleep. The DG/CA3 displays strong coupling between delta and ripple oscillations with all the other hippocampal subfields. In contrast, the regions of CA1 and SUB exhibit more precise coordination, characterized by event-level triple coupling between delta, spindle, and ripple oscillations. Furthermore, we demonstrate that the synaptic plasticity within the hippocampal circuit, as indexed by delta-wave slope, is linearly modulated by spindle power. In contrast, ripples act as a binary switch that triggers a sudden increase in delta-wave slope. Overall, these results suggest that different subfields of the hippocampus regulate one another through diverse layers of sleep oscillation synchronization, collectively facilitating information processing and synaptic plasticity during NREM sleep.
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Affiliation(s)
- Zhipeng Li
- School of Life Science and Technology, HIT Faculty of Life Science and Medicine, Harbin Institute of Technology, Harbin, 150001, China
- Laboratory for Space Environment and Physical Sciences, Harbin Institute of Technology, Harbin, 150001, China
| | - Jing Wang
- Department of Neurology, SanBo Brain Hospital, Capital Medical University, Beijing, 100093, China
| | - Chongyang Tang
- Department of Neurosurgery, SanBo Brain Hospital, Capital Medical University, Beijing, 100093, China
| | - Peng Wang
- Institute of Psychology, University of Greifswald, Greifswald, Germany
| | - Peng Ren
- Institute of Science and Technology for Brain-Inspired Intelligence and Department of Neurology, Huashan Hospital, Fudan University, Shanghai, China
| | - Siyang Li
- Zhejiang Lab, Hangzhou, Zhejiang, 311100, China
| | - Liye Yi
- The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Qiuyi Liu
- School of Life Science and Technology, HIT Faculty of Life Science and Medicine, Harbin Institute of Technology, Harbin, 150001, China
- Laboratory for Space Environment and Physical Sciences, Harbin Institute of Technology, Harbin, 150001, China
| | - Lili Sun
- School of Life Science and Technology, HIT Faculty of Life Science and Medicine, Harbin Institute of Technology, Harbin, 150001, China
- Laboratory for Space Environment and Physical Sciences, Harbin Institute of Technology, Harbin, 150001, China
| | - Kaizhou Li
- School of Life Science and Technology, HIT Faculty of Life Science and Medicine, Harbin Institute of Technology, Harbin, 150001, China
- Laboratory for Space Environment and Physical Sciences, Harbin Institute of Technology, Harbin, 150001, China
| | - Wencai Ding
- Department of Neurology, The Second Affiliated Hospital of Wannan Medical College, Wuhu, China
| | - Hongbo Bao
- Department of Neurosurgery, Harbin Medical University Cancer Hospital, 150081, Harbin, China
- Department of Neurosurgery, BeijingTiantan Hospital, Capital Medical University, 100070, Beijing, China
| | - Lifen Yao
- Department of Neurology, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China
| | - Meng Na
- Department of Neurosurgery, The First Affiliated Hospital of Harbin Medical University, Harbin, 150001, China.
| | - Guoming Luan
- Department of Neurosurgery, SanBo Brain Hospital, Capital Medical University, Beijing, 100093, China.
- Center of Epilepsy, Beijing Institute for Brain Disorders, Beijing, 100093, China.
| | - Xia Liang
- School of Life Science and Technology, HIT Faculty of Life Science and Medicine, Harbin Institute of Technology, Harbin, 150001, China.
- Laboratory for Space Environment and Physical Sciences, Harbin Institute of Technology, Harbin, 150001, China.
- Frontiers Science Center for Matter Behave in Space Environment, Harbin Institute of Technology, Harbin, 150001, China.
- Research Center for Social Computing and Information Retrieval, Harbin Institute of Technology, Harbin, China.
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Gilbert ZD, Martin Del Campo-Vera R, Tang AM, Chen KH, Sebastian R, Shao A, Tabarsi E, Chung RS, Leonor A, Sundaram S, Heck C, Nune G, Liu CY, Kellis S, Lee B. Baseline hippocampal beta band power Is lower in the presence of movement uncertainty. J Neural Eng 2022; 19. [PMID: 35803209 DOI: 10.1088/1741-2552/ac7fb9] [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: 03/30/2022] [Accepted: 07/08/2022] [Indexed: 11/12/2022]
Abstract
Objective This study aimed to characterize hippocampal neural signatures of uncertainty by measuring beta band power in the period prior to movement cue. Approach Participants with epilepsy were implanted with hippocampal depth electrodes for stereo electroencephalographic (SEEG) monitoring. Hippocampal beta (13-30 Hz) power changes have been observed during motor tasks such as the direct reach (DR) and Go/No-Go (GNG) tasks. The primary difference between the tasks is the presence of uncertainty about whether movement should be executed. Previous research on cortical responses to uncertainty has found that baseline beta power changes with uncertainty. SEEG data were sampled throughout phases of the DR and GNG tasks. Beta-band power during the fixation phase was compared between the DR and GNG task using a Wilcoxon rank sum test. This unpaired test was also used to analyze response times from cue to task completion between tasks. Main Results Eight patients who performed both reaching tasks were analyzed in this study. Movement response times in the GNG task were on average 210 milliseconds slower than in the DR task. All patients exhibited a significantly increased response latency in the GNG task compared to the DR task (Wilcoxon rank-sum p-value < 0.001). Six out of eight patients demonstrated statistically significant differences in beta power in single hippocampal contacts between the fixation phases of the GNG and DR tasks. At the group level, baseline beta power was significantly lower in the GNG task than in the DR task (Wilcoxon rank-sum p-value < 0.001). Significance This novel study found that, in the presence of task uncertainty, baseline beta power in the hippocampus is lower than in its absence. This finding implicates movement uncertainty as an important factor in baseline hippocampal beta power during movement preparation.
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Affiliation(s)
- Zachary D Gilbert
- Department of Neurological Surgery, University of Southern California Keck School of Medicine, 1200 N State Street, Los Angeles, California, 90033, UNITED STATES
| | - Roberto Martin Del Campo-Vera
- Department of Neurological Surgery, University of Southern California Keck School of Medicine, 1200 N State Street, Los Angeles, California, 90033, UNITED STATES
| | - Austin M Tang
- Department of Neurological Surgery, University of Southern California Keck School of Medicine, 1200 N State Street, Los Angeles, California, 90033, UNITED STATES
| | - Kuang-Hsuan Chen
- Department of Neurological Surgery, University of Southern California Keck School of Medicine, 1200 N State Street, Los Angeles, California, 90033, UNITED STATES
| | - Rinu Sebastian
- Department of Neurological Surgery, University of Southern California Keck School of Medicine, 1200 N State Street, Los Angeles, California, 90033, UNITED STATES
| | - Arthur Shao
- Department of Neurological Surgery, University of Southern California Keck School of Medicine, 1200 N State Street, Los Angeles, California, 90033, UNITED STATES
| | - Emiliano Tabarsi
- Department of Neurological Surgery, University of Southern California Keck School of Medicine, 1200 N State Street, Los Angeles, California, 90033, UNITED STATES
| | - Ryan S Chung
- Department of Neurological Surgery, University of Southern California Keck School of Medicine, 1200 N State Street, Los Angeles, California, 90033, UNITED STATES
| | - Andrea Leonor
- Department of Neurological Surgery, University of Southern California Keck School of Medicine, 1200 N State Street, Los Angeles, California, 90033, UNITED STATES
| | - Shivani Sundaram
- Department of Neurological Surgery, University of Southern California Keck School of Medicine, 1200 N State Street, Los Angeles, California, 90033, UNITED STATES
| | - Christi Heck
- Neurorestoration Center and Department of Neurology, University of Southern California Keck School of Medicine, 2051 Marengo Street, Los Angeles, California, 90033, UNITED STATES
| | - George Nune
- Neurorestoration Center and Department of Neurology, University of Southern California Keck School of Medicine, 2051 Marengo Street, Los Angeles, California, 90033, UNITED STATES
| | - Charles Y Liu
- Neurorestoration Center and Department of Neurological Surgery and Neurology, University of Southern California Keck School of Medicine, 1200 N State Street, Los Angeles, California, 90033, UNITED STATES
| | - Spencer Kellis
- Neurorestoration Center and Department of Neurological Surgery, University of Southern California Keck School of Medicine, 1200 N State Street, Los Angeles, California, 90033, UNITED STATES
| | - Brian Lee
- Neuroresotoration Center and Department of Neurological Surgery, University of Southern California Keck School of Medicine, 1200 N State Street, Los Angeles, California, 90033, UNITED STATES
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del Campo-Vera RM, Tang AM, Gogia AS, Chen KH, Sebastian R, Gilbert ZD, Nune G, Liu CY, Kellis S, Lee B. Neuromodulation in Beta-Band Power Between Movement Execution and Inhibition in the Human Hippocampus. Neuromodulation 2022; 25:232-244. [PMID: 35125142 PMCID: PMC8727636 DOI: 10.1111/ner.13486] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 05/08/2021] [Accepted: 06/01/2021] [Indexed: 02/03/2023]
Abstract
INTRODUCTION The hippocampus is thought to be involved in movement, but its precise role in movement execution and inhibition has not been well studied. Previous work with direct neural recordings has found beta-band (13-30 Hz) modulation in both movement execution and inhibition throughout the motor system, but the role of beta-band modulation in the hippocampus during movement inhibition is not well understood. Here, we perform a Go/No-Go reaching task in ten patients with medically refractory epilepsy to study human hippocampal beta-power changes during movement. MATERIALS AND METHODS Ten epilepsy patients (5 female; ages 21-46) were implanted with intracranial depth electrodes for seizure monitoring and localization. Local field potentials were sampled at 2000 Hz during a Go/No-Go movement task. Comparison of beta-band power between Go and No-Go conditions was conducted using Wilcoxon signed-rank hypothesis testing for each patient. Sub-analyses were conducted to assess differences in the anterior vs posterior contacts, ipsilateral vs contralateral contacts, and male vs female beta-power values. RESULTS Eight out of ten patients showed significant beta-power decreases during the Go movement response (p < 0.05) compared to baseline. Eight out of ten patients also showed significant beta-power increases in the No-Go condition, occurring in the absence of movement. No significant differences were noted between ipsilateral vs contralateral contacts nor in anterior vs posterior hippocampal contacts. Female participants had a higher task success rate than males and had significantly greater beta-power increases in the No-Go condition (p < 0.001). CONCLUSION These findings indicate that increases in hippocampal beta power are associated with movement inhibition. To the best of our knowledge, this study is the first to report this phenomenon in the human hippocampus. The beta band may represent a state-change signal involved in motor processing. Future focus on the beta band in understanding human motor and impulse control will be vital.
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Affiliation(s)
- Roberto Martin del Campo-Vera
- Department of Neurological Surgery, Keck School of Medicine of USC, University of Southern California, Los Angeles, CA, United States
| | - Austin M. Tang
- Department of Neurological Surgery, Keck School of Medicine of USC, University of Southern California, Los Angeles, CA, United States
| | - Angad S. Gogia
- Department of Neurological Surgery, Keck School of Medicine of USC, University of Southern California, Los Angeles, CA, United States
| | - Kuang-Hsuan Chen
- Department of Neurological Surgery, Keck School of Medicine of USC, University of Southern California, Los Angeles, CA, United States
| | - Rinu Sebastian
- Department of Neurological Surgery, Keck School of Medicine of USC, University of Southern California, Los Angeles, CA, United States
| | - Zachary D. Gilbert
- Department of Neurological Surgery, Keck School of Medicine of USC, University of Southern California, Los Angeles, CA, United States
| | - George Nune
- Department of Neurology, Keck School of Medicine of USC, University of Southern California, Los Angeles, CA, United States,USC Neurorestoration Center, Keck School of Medicine of USC, Los Angeles, CA, United States
| | - Charles Y. Liu
- Department of Neurological Surgery, Keck School of Medicine of USC, University of Southern California, Los Angeles, CA, United States,USC Neurorestoration Center, Keck School of Medicine of USC, Los Angeles, CA, United States,Department of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, United States
| | - Spencer Kellis
- Department of Neurological Surgery, Keck School of Medicine of USC, University of Southern California, Los Angeles, CA, United States,USC Neurorestoration Center, Keck School of Medicine of USC, Los Angeles, CA, United States,Department of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, United States,Tianqiao and Chrissy Chen Brain-Machine Interface Center, Chen Institute for Neuroscience, California Institute of Technology, Pasadena, CA, United States
| | - Brian Lee
- Department of Neurological Surgery, Keck School of Medicine of USC, University of Southern California, Los Angeles, CA, United States,USC Neurorestoration Center, Keck School of Medicine of USC, Los Angeles, CA, United States,Department of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, United States
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van Schalkwijk FJ, Gruber WR, Miller LA, Trinka E, Höller Y. Investigating the Effects of Seizures on Procedural Memory Performance in Patients with Epilepsy. Brain Sci 2021; 11:brainsci11020261. [PMID: 33669626 PMCID: PMC7922212 DOI: 10.3390/brainsci11020261] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 02/08/2021] [Accepted: 02/16/2021] [Indexed: 11/16/2022] Open
Abstract
Memory complaints are frequently reported by patients with epilepsy and are associated with seizure occurrence. Yet, the direct effects of seizures on memory retention are difficult to assess given their unpredictability. Furthermore, previous investigations have predominantly assessed declarative memory. This study evaluated within-subject effects of seizure occurrence on retention and consolidation of a procedural motor sequence learning task in patients with epilepsy undergoing continuous monitoring for five consecutive days. Of the total sample of patients considered for analyses (N = 53, Mage = 32.92 ± 13.80 y, range = 18–66 y; 43% male), 15 patients experienced seizures and were used for within-patient analyses. Within-patient contrasts showed general improvements over seizure-free (day + night) and seizure-affected retention periods. Yet, exploratory within-subject contrasts for patients diagnosed with temporal lobe epilepsy (n = 10) showed that only seizure-free retention periods resulted in significant improvements, as no performance changes were observed following seizure-affected retention. These results indicate general performance improvements and offline consolidation of procedural memory during the day and night. Furthermore, these results suggest the relevance of healthy temporal lobe functioning for successful consolidation of procedural information, as well as the importance of seizure control for effective retention and consolidation of procedural memory.
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Affiliation(s)
- Frank J. van Schalkwijk
- Christian Doppler Medical Centre and Centre for Cognitive Neuroscience, Department of Neurology, Paracelsus Medical University, 5020 Salzburg, Austria; (F.J.v.S.); (E.T.)
| | - Walter R. Gruber
- Centre for Cognitive Neuroscience (CCNS), Department of Psychology, University of Salzburg, 5020 Salzburg, Austria;
| | - Laurie A. Miller
- Institute of Clinical Neurosciences, Royal Prince Alfred Hospital and Central Medical School, University of Sydney, Camperdown, Sydney, NSW 2050, Australia;
- ARC Centre of Excellence in Cognition and Its Disorders, University of Sydney, Camperdown, Sydney, NSW 2006, Australia
| | - Eugen Trinka
- Christian Doppler Medical Centre and Centre for Cognitive Neuroscience, Department of Neurology, Paracelsus Medical University, 5020 Salzburg, Austria; (F.J.v.S.); (E.T.)
| | - Yvonne Höller
- Christian Doppler Medical Centre and Centre for Cognitive Neuroscience, Department of Neurology, Paracelsus Medical University, 5020 Salzburg, Austria; (F.J.v.S.); (E.T.)
- Faculty of Psychology, University of Akureyri, 600 Akureyri, Iceland
- Correspondence: ; Tel.: +35-044-608-576
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Toscano-Hermoso MD, Arbinaga F, Fernández-Ozcorta EJ, Gómez-Salgado J, Ruiz-Frutos C. Influence of Sleeping Patterns in Health and Academic Performance Among University Students. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:E2760. [PMID: 32316249 PMCID: PMC7215924 DOI: 10.3390/ijerph17082760] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 04/12/2020] [Accepted: 04/14/2020] [Indexed: 01/20/2023]
Abstract
Sleep problems in university students are important and have implications for health, quality of life, and academic performance. Using an ex post facto design, a total sample of 855 students (55.7% women) participated in the study. Sleep assessment was conducted using the Pittsburgh Sleep Quality Index, the Nightmare Frequency Scale, the Nightmare Proneness Scale, and the Composite Morningness Scale. Women show a higher risk [OR = 2.61] of presenting poor sleep quality (> 5 points on the PSQI) compared with men (p < 0.001). Similarly, women reported a greater frequency of nightmares (p < 0.001, d = 0.60), greater propensity for nightmares (p < 0.001, d = 0.70) and a higher score on Item-5h of the PSQI regarding nightmares (p < 0.001, d = 0.59). Women, compared with men, show higher risk [OR = 2.84] for a sleep disorder related to nightmares (p = 0.012). Women need more time to reach a state of alertness after getting up (p = 0.022), and there was an interaction between sex and the alertness factor when evaluating the subjective quality of sleep (p = 0.030). Women show worse sleep quality and a higher frequency and propensity for suffering nightmares. When considering the relationship between sleep quality and academic performance, it is observed that students with poor sleep quality obtain lower academic scores (M = 7.21, SD = 0.805) than those with good sleep quality (M = 7.32, SD = 0.685), an effect that reaches significance (t = 2.116, p = 0.035). Regarding the relationship between the categorized chronotype and academic performance, students with a morning chronotype achieve better academic results (M = 7.41, SD = 0.89) than their evening counterparts (M = 7.15, SD = 0.76), although these differences have a small effect size (d = 0.31).
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Affiliation(s)
| | - Félix Arbinaga
- Faculty of Education, Psychology and Sports Science, Department of Clinical and Experimental Psychology, University of Huelva, 21007 Huelva, Spain
| | - Eduardo J. Fernández-Ozcorta
- Department of Physical Activity and Sports, Center for University Studies Cardenal Spínola CEU, University of Seville attached centre, 41930 Bormujos, Spain;
| | - Juan Gómez-Salgado
- School of Labour Sciences, Department of Sociology, Social Work and Public Health, University of Huelva, 21007 Huelva, Spain;
- Safety and Health Posgrade Program, University Espiritu Santo, 092301 Guayaquil, Ecuador
| | - Carlos Ruiz-Frutos
- School of Labour Sciences, Department of Sociology, Social Work and Public Health, University of Huelva, 21007 Huelva, Spain;
- Safety and Health Posgrade Program, University Espiritu Santo, 092301 Guayaquil, Ecuador
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Sleep modulates effective connectivity: A study using intracranial stimulation and recording. Clin Neurophysiol 2019; 131:529-541. [PMID: 31708382 DOI: 10.1016/j.clinph.2019.09.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 08/30/2019] [Accepted: 09/03/2019] [Indexed: 10/25/2022]
Abstract
OBJECTIVE Sleep is an active process with an important role in memory. Epilepsy patients often display a disturbed sleep architecture, with consequences on cognition. We aimed to investigate the effect of sleep on cortical networks' organization. METHODS We analyzed cortico-cortical evoked responses elicited by single pulse electrical stimulation (SPES) using intracranial depth electrodes in 25 patients with drug-resistant focal epilepsy explored using stereo-EEG. We applied the SPES protocol during wakefulness and NREM - N2 sleep. We analyzed 31,710 significant responses elicited by 799 stimulations covering most brain structures, epileptogenic or non-epileptogenic. We analyzed effective connectivity between structures using a graph-theory approach. RESULTS Sleep increases excitability in the brain, regardless of epileptogenicity. Local and distant connections are differently modulated by sleep, depending on the tissue epileptogenicity. In non-epileptogenic areas, frontal lobe connectivity is enhanced during sleep. There is increased connectivity between the hippocampus and temporal neocortex, while perisylvian structures are disconnected from the temporal lobe. In epileptogenic areas, we found a clear interhemispheric difference, with decreased connectivity in the right hemisphere during sleep. CONCLUSIONS Sleep modulates brain excitability and reconfigures functional brain networks, depending on tissue epileptogenicity. SIGNIFICANCE We found specific patterns of information flow during sleep in physiologic and pathologic structures, with possible implications for cognition.
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Cerasuolo M, Conte F, Cellini N, Fusco G, Giganti F, Malloggi S, Ficca G. The effect of complex cognitive training on subsequent night sleep. J Sleep Res 2019; 29:e12929. [PMID: 31651070 DOI: 10.1111/jsr.12929] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 08/03/2019] [Accepted: 09/13/2019] [Indexed: 11/30/2022]
Abstract
Using a nap design, we have recently shown that training at a complex cognitive task at bedtime improves objective sleep quality by reducing sleep fragmentation. In order to extend our findings to nighttime sleep, here we assess the impact of a multi-componential cognitive task at bedtime on the subsequent sleep episode of subjects reporting habitual bad sleep, allegedly characterized by high sleep fragmentation. In a within-subjects design, 20 subjective bad sleepers underwent polysomnographic recording in three conditions: (a) baseline sleep (BL); (b) post-training sleep (TR), preceded by a complex ecological task, i.e. a modified version of the word game Ruzzle; (c) post-active control sleep (AC), preceded by a control task. Sleep in TR was more organized (higher number of cycles and longer time spent in cycles) and showed lower microarousal frequency than in AC and BL. As for sleep continuity (total and brief awakening frequency) and other stability measures (state transition and functional uncertainty period frequency, time in functional uncertainty), both TR and AC showed significant improvements compared with BL. Arousal frequency was also reduced in TR relative to BL. Our results show a clear impact of cognitive training on subsequent night sleep, basically consisting of an increase in sleep continuity, stability and organization. In our sample of bad sleepers, these post-training changes end up representing a notable sleep improvement, also consistently reflected in subjective sleep quality perception. Therefore, ecological pre-sleep cognitive training should be further studied as an easily accessible complementary approach in standard therapies for sleep-disordered populations.
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Affiliation(s)
- Mariangela Cerasuolo
- Department of Psychology, University of Campania "L. Vanvitelli", Caserta, Italy
| | - Francesca Conte
- Department of Psychology, University of Campania "L. Vanvitelli", Caserta, Italy
| | - Nicola Cellini
- Department of General Psychology, University of Padova, Padova, Italy
| | - Giuseppina Fusco
- Department of Psychology, University of Campania "L. Vanvitelli", Caserta, Italy
| | - Fiorenza Giganti
- Department of Neuroscience, Psychology, Drug Research and Child Health, University of Firenze, Firenze, Italy
| | - Serena Malloggi
- Department of Neuroscience, Psychology, Drug Research and Child Health, University of Firenze, Firenze, Italy
| | - Gianluca Ficca
- Department of Psychology, University of Campania "L. Vanvitelli", Caserta, Italy
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Cerasuolo M, Conte F, Giganti F, Ficca G. Sleep changes following intensive cognitive activity. Sleep Med 2019; 66:148-158. [PMID: 31877506 DOI: 10.1016/j.sleep.2019.08.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 08/28/2019] [Accepted: 08/28/2019] [Indexed: 12/17/2022]
Abstract
Studies over the last 40 years have mainly investigated sleep structure changes as a result of wake duration, in the frame of the classical sleep regulation theories. However, wake intervals of the same duration can profoundly differ in their intensity, which actually reflects the degree of cognitive and physical activity. Data on how sleep can be modified by wake intensity changes (initially sparse and of little consistence) have become much more substantial, especially in the frame of the intense research debate on sleep-memory relationships. Our aim is to examine the vast repertoire of sleep modifications that depend on waking cognitive manipulations, highlighting the sleep features that appear most affected. By systematically addressing this issue, we want to set the basis for future research exploring both the specific nature of the mechanisms involved and the applicative psychosocial and clinical fall-outs, in terms of possible behavioural interventions for sleep quality improvement.
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Affiliation(s)
- Mariangela Cerasuolo
- Department of Psychology, University of Campania "L. Vanvitelli", Caserta, Italy
| | - Francesca Conte
- Department of Psychology, University of Campania "L. Vanvitelli", Caserta, Italy
| | - Fiorenza Giganti
- Department of Neuroscience, Psychology, Drug Research and Child Health, University of Florence, Florence, Italy
| | - Gianluca Ficca
- Department of Psychology, University of Campania "L. Vanvitelli", Caserta, Italy.
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Schapiro AC, Reid AG, Morgan A, Manoach DS, Verfaellie M, Stickgold R. The hippocampus is necessary for the consolidation of a task that does not require the hippocampus for initial learning. Hippocampus 2019; 29:1091-1100. [PMID: 31157946 DOI: 10.1002/hipo.23101] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 04/02/2019] [Accepted: 04/29/2019] [Indexed: 11/09/2022]
Abstract
During sleep, the hippocampus plays an active role in consolidating memories that depend on it for initial encoding. There are hints in the literature that the hippocampus may have a broader influence, contributing to the consolidation of memories that may not initially require the area. We tested this possibility by evaluating learning and consolidation of the motor sequence task (MST) in hippocampal amnesics and demographically matched control participants. While the groups showed similar initial learning, only controls exhibited evidence of overnight consolidation. These results demonstrate that the hippocampus can be required for normal consolidation of a task without being required for its acquisition, suggesting that the area plays a broader role in coordinating memory consolidation than has previously been assumed.
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Affiliation(s)
- Anna C Schapiro
- Department of Psychiatry, Beth Israel Deaconess Medical Center, Boston, Massachusetts.,Harvard Medical School, Boston, Massachusetts.,Department of Psychology, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Allison G Reid
- Memory Disorders Research Center, VA Boston Healthcare System, Boston, Massachusetts
| | - Alexandra Morgan
- Department of Psychiatry, Beth Israel Deaconess Medical Center, Boston, Massachusetts
| | - Dara S Manoach
- Harvard Medical School, Boston, Massachusetts.,Department of Psychiatry, Massachusetts General Hospital, Charlestown, Massachusetts.,Athinoula A. Martinos Center for Biomedical Imaging, Charlestown, Massachusetts
| | - Mieke Verfaellie
- Memory Disorders Research Center, VA Boston Healthcare System, Boston, Massachusetts.,Department of Psychiatry, Boston University School of Medicine, Boston, Massachusetts
| | - Robert Stickgold
- Department of Psychiatry, Beth Israel Deaconess Medical Center, Boston, Massachusetts.,Harvard Medical School, Boston, Massachusetts
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11
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Proserpio P, Arnaldi D, Nobili F, Nobili L. Integrating Sleep and Alzheimer’s Disease Pathophysiology: Hints for Sleep Disorders Management. J Alzheimers Dis 2018; 63:871-886. [DOI: 10.3233/jad-180041] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Paola Proserpio
- Centre of Sleep Medicine, Department of Neuroscience, Niguarda Hospital, Milan, Italy
| | - Dario Arnaldi
- Department of Neuroscience (DINOGMI), University of Genoa, Italy
- Clinical of Neurology, Polyclinic San Martino Hospital, Genoa, Italy
| | - Flavio Nobili
- Department of Neuroscience (DINOGMI), University of Genoa, Italy
- Clinical of Neurology, Polyclinic San Martino Hospital, Genoa, Italy
| | - Lino Nobili
- Centre of Sleep Medicine, Department of Neuroscience, Niguarda Hospital, Milan, Italy
- Department of Neuroscience (DINOGMI), University of Genoa, Italy
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12
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King BR, Hoedlmoser K, Hirschauer F, Dolfen N, Albouy G. Sleeping on the motor engram: The multifaceted nature of sleep-related motor memory consolidation. Neurosci Biobehav Rev 2017; 80:1-22. [DOI: 10.1016/j.neubiorev.2017.04.026] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Revised: 04/19/2017] [Accepted: 04/24/2017] [Indexed: 12/16/2022]
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13
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Weyde KV, Krog NH, Oftedal B, Evandt J, Magnus P, Øverland S, Clark C, Stansfeld S, Aasvang GM. Nocturnal Road Traffic Noise Exposure and Children's Sleep Duration and Sleep Problems. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2017; 14:ijerph14050491. [PMID: 28481249 PMCID: PMC5451942 DOI: 10.3390/ijerph14050491] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Revised: 04/28/2017] [Accepted: 05/04/2017] [Indexed: 01/13/2023]
Abstract
Almost half of the European Union (EU)’s population is exposed to road traffic noise above levels that constitute a health risk. Associations between road traffic noise and impaired sleep in adults have consistently been reported. Less is known about effects of noise on children’s sleep. The aim of this study was to examine the association between nocturnal road traffic noise exposure and children’s parental-reported sleep duration and sleep problems. The present cross-sectional study used data from The Norwegian Mother and Child Cohort Study. Parental report of children’s sleep duration and sleep problems at age 7 was linked to modelled levels of residential night-time road traffic noise. The study population included 2665 children from Oslo, Norway. No association was found between road traffic noise and sleep duration in the total study population (odds ratio (OR): 1.05, 95% confidence interval (CI): [0.94, 1.17]), but a statistically significant association was observed in girls (OR: 1.21, 95% CI: [1.04, 1.41]). For sleep problems, the associations were similar (OR: 1.36, 95% CI: [0.85, 2.16]) in girls. The ORs are presented for an increase of 10 dB. The findings suggest there is an association between road traffic noise and sleep for girls, underlining the importance of protecting children against excessive noise levels.
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Affiliation(s)
- Kjell Vegard Weyde
- Department of Air Pollution and Noise, Norwegian Institute of Public Health, Pb 4404 Nydalen, 0403 Oslo, Norway.
| | - Norun Hjertager Krog
- Department of Air Pollution and Noise, Norwegian Institute of Public Health, Pb 4404 Nydalen, 0403 Oslo, Norway.
| | - Bente Oftedal
- Department of Air Pollution and Noise, Norwegian Institute of Public Health, Pb 4404 Nydalen, 0403 Oslo, Norway.
| | - Jorunn Evandt
- Department of Air Pollution and Noise, Norwegian Institute of Public Health, Pb 4404 Nydalen, 0403 Oslo, Norway.
| | - Per Magnus
- Domain of Health Data and Digitalization, Norwegian Institute of Public Health, Pb 4404 Nydalen, 0403 Oslo, Norway.
- Institute of Health and Society, Faculty of Medicine, University of Oslo, Pb 1130 Blindern, 0318 Oslo, Norway.
| | - Simon Øverland
- Division of Mental Health, Norwegian Institute of Public Health, Zander Kaaes gate 7, 5015 Bergen, Norway.
- Faculty of Psychology, University of Bergen, Pb 7807, 5020 Bergen, Norway.
| | - Charlotte Clark
- Centre for Psychiatry, Wolfson Institute of Preventive Medicine, Barts and the London School of Medicine, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, UK.
| | - Stephen Stansfeld
- Centre for Psychiatry, Wolfson Institute of Preventive Medicine, Barts and the London School of Medicine, Queen Mary University of London, Charterhouse Square, London EC1M 6BQ, UK.
| | - Gunn Marit Aasvang
- Department of Air Pollution and Noise, Norwegian Institute of Public Health, Pb 4404 Nydalen, 0403 Oslo, Norway.
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14
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Genzel L, Bäurle A, Potyka A, Wehrle R, Adamczyk M, Friess E, Steiger A, Dresler M. Diminished nap effects on memory consolidation are seen under oral contraceptive use. Neuropsychobiology 2016; 70:253-261. [PMID: 25720656 DOI: 10.1159/000369022] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2013] [Accepted: 10/10/2014] [Indexed: 11/19/2022]
Abstract
Many young females take exogenous hormones as oral contraceptive (OC), a condition rarely controlled for in studies on sleep and memory consolidation even though sex hormones influence consolidation. This study investigated the effects of OCs on sleep-related consolidation of a motor and declarative task, utilizing a daytime nap protocol. Fifteen healthy, young females taking OCs came to the sleep lab for three different conditions: nap with previous learning, wake with previous learning and nap without learning. They underwent each condition twice, once during the "pill-active" weeks and once during the "pill-free" week, resulting in 6 visits. In all conditions, participants showed a significant off-line consolidation effect, independent of pill week or nap/wake condition. There were no significant differences in sleep stage duration, spindle activity or spectral EEG frequency bands between naps with or without the learning condition. The present data showed a significant off-line enhancement in memory irrespective of potential beneficial effects of a nap. In comparison to previous studies, this may suggest that the use of OCs may enhance off-line memory consolidation in motor and verbal tasks per se. These results stress the importance to control for the use of OCs in studies focusing on memory performance.
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15
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Seidner G, Robinson JE, Wu M, Worden K, Masek P, Roberts SW, Keene AC, Joiner WJ. Identification of Neurons with a Privileged Role in Sleep Homeostasis in Drosophila melanogaster. Curr Biol 2015; 25:2928-38. [PMID: 26526372 DOI: 10.1016/j.cub.2015.10.006] [Citation(s) in RCA: 94] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Revised: 09/25/2015] [Accepted: 10/02/2015] [Indexed: 12/17/2022]
Abstract
Sleep is thought to be controlled by two main processes: a circadian clock that primarily regulates sleep timing and a homeostatic mechanism that detects and responds to sleep need. Whereas abundant experimental evidence suggests that sleep need increases with time spent awake, the contributions of different brain arousal systems have not been assessed independently of each other to determine whether certain neural circuits, rather than waking per se, selectively contribute to sleep homeostasis. Using the fruit fly, Drosophila melanogaster, we found that sustained thermogenetic activation of three independent neurotransmitter systems promoted nighttime wakefulness. However, only sleep deprivation resulting from activation of cholinergic neurons was sufficient to elicit subsequent homeostatic recovery sleep, as assessed by multiple behavioral criteria. In contrast, sleep deprivation resulting from activation of octopaminergic neurons suppressed homeostatic recovery sleep, indicating that wakefulness can be dissociated from accrual of sleep need. Neurons that promote sleep homeostasis were found to innervate the central brain and motor control regions of the thoracic ganglion. Blocking activity of these neurons suppressed recovery sleep but did not alter baseline sleep, further differentiating between neural control of sleep homeostasis and daily fluctuations in the sleep/wake cycle. Importantly, selective activation of wake-promoting neurons without engaging the sleep homeostat impaired subsequent short-term memory, thus providing evidence that neural circuits that regulate sleep homeostasis are important for behavioral plasticity. Together, our data suggest a neural circuit model involving distinct populations of wake-promoting neurons, some of which are involved in homeostatic control of sleep and cognition.
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Affiliation(s)
- Glen Seidner
- Department of Pharmacology, University of California San Diego, La Jolla, CA 92093, USA
| | - James E Robinson
- Department of Pharmacology, University of California San Diego, La Jolla, CA 92093, USA; Biomedical Sciences Graduate Program, University of California San Diego, La Jolla, CA 92093, USA
| | - Meilin Wu
- Department of Pharmacology, University of California San Diego, La Jolla, CA 92093, USA
| | - Kurtresha Worden
- Department of Molecular and Cell Biology, University of California Berkeley, Berkeley, CA 94720, USA
| | - Pavel Masek
- Department of Biological Sciences, Binghamton University, Binghamton, NY 13902, USA
| | - Stephen W Roberts
- Department of Mechanical and Aerospace Engineering, University of California San Diego, La Jolla, CA 92093, USA
| | - Alex C Keene
- Department of Biological Sciences, Florida Atlantic University, Jupiter, FL 33458, USA
| | - William J Joiner
- Department of Pharmacology, University of California San Diego, La Jolla, CA 92093, USA; Biomedical Sciences Graduate Program, University of California San Diego, La Jolla, CA 92093, USA; Neurosciences Graduate Program, University of California San Diego, La Jolla, CA 92093, USA; Center for Circadian Biology, University of California San Diego, La Jolla, CA 92093, USA.
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16
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Reactivation of emergent task-related ensembles during slow-wave sleep after neuroprosthetic learning. Nat Neurosci 2014; 17:1107-13. [PMID: 24997761 DOI: 10.1038/nn.3759] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Accepted: 06/12/2014] [Indexed: 12/11/2022]
Abstract
Brain-machine interfaces can allow neural control over assistive devices. They also provide an important platform for studying neural plasticity. Recent studies have suggested that optimal engagement of learning is essential for robust neuroprosthetic control. However, little is known about the neural processes that may consolidate a neuroprosthetic skill. On the basis of the growing body of evidence linking slow-wave activity (SWA) during sleep to consolidation, we examined whether there is 'offline' processing after neuroprosthetic learning. Using a rodent model, we found that, after successful learning, task-related units specifically experienced increased locking and coherency to SWA during sleep. Moreover, spike-spike coherence among these units was substantially enhanced. These changes were not present with poor skill acquisition or after control awake periods, demonstrating the specificity of our observations to learning. Notably, the time spent in SWA predicted the performance gains. Thus, SWA appears to be involved in offline processing after neuroprosthetic learning.
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17
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Moroni F, Nobili L, Iaria G, Sartori I, Marzano C, Tempesta D, Proserpio P, Lo Russo G, Gozzo F, Cipolli C, De Gennaro L, Ferrara M. Hippocampal slow EEG frequencies during NREM sleep are involved in spatial memory consolidation in humans. Hippocampus 2014; 24:1157-68. [PMID: 24796545 DOI: 10.1002/hipo.22299] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/23/2014] [Indexed: 02/05/2023]
Affiliation(s)
- Fabio Moroni
- Department of Psychology; “Sapienza” University of Rome; Roma Italy
- Laboratory of Psychology; Department of Specialized; Diagnostics and Experimental Medicine, University of Bologna; Bologna Italy
| | - Lino Nobili
- Centre of Epilepsy Surgery “C. Munari”, Center of Sleep Medicine, Niguarda Hospital; Milan Italy
- Institute of Bioimaging and Molecular Physiology, Section of Genoa, National Research Council; Genova Italy
| | - Giuseppe Iaria
- Department of Psychology and Clinical Neurosciences; and Hotchkiss Brain Institute; University of Calgary; Calgary Alberta Canada
| | - Ivana Sartori
- Centre of Epilepsy Surgery “C. Munari”, Center of Sleep Medicine, Niguarda Hospital; Milan Italy
| | - Cristina Marzano
- Department of Psychology; “Sapienza” University of Rome; Roma Italy
| | - Daniela Tempesta
- Department of Life; Health and Environmental Sciences; University of L'Aquila; L'Aquila Italy
| | - Paola Proserpio
- Centre of Epilepsy Surgery “C. Munari”, Center of Sleep Medicine, Niguarda Hospital; Milan Italy
| | - Giorgio Lo Russo
- Centre of Epilepsy Surgery “C. Munari”, Center of Sleep Medicine, Niguarda Hospital; Milan Italy
| | - Francesca Gozzo
- Centre of Epilepsy Surgery “C. Munari”, Center of Sleep Medicine, Niguarda Hospital; Milan Italy
| | - Carlo Cipolli
- Laboratory of Psychology; Department of Specialized; Diagnostics and Experimental Medicine, University of Bologna; Bologna Italy
| | - Luigi De Gennaro
- Department of Psychology; “Sapienza” University of Rome; Roma Italy
| | - Michele Ferrara
- Department of Life; Health and Environmental Sciences; University of L'Aquila; L'Aquila Italy
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18
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Kinreich S, Podlipsky I, Jamshy S, Intrator N, Hendler T. Neural dynamics necessary and sufficient for transition into pre-sleep induced by EEG neurofeedback. Neuroimage 2014; 97:19-28. [PMID: 24768931 DOI: 10.1016/j.neuroimage.2014.04.044] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2013] [Revised: 03/31/2014] [Accepted: 04/12/2014] [Indexed: 11/16/2022] Open
Abstract
The transition from being fully awake to pre-sleep occurs daily just before falling asleep; thus its disturbance might be detrimental. Yet, the neuronal correlates of the transition remain unclear, mainly due to the difficulty in capturing its inherent dynamics. We used an EEG theta/alpha neurofeedback to rapidly induce the transition into pre-sleep and simultaneous fMRI to reveal state-dependent neural activity. The relaxed mental state was verified by the corresponding enhancement in the parasympathetic response. Neurofeedback sessions were categorized as successful or unsuccessful, based on the known EEG signature of theta power increases over alpha, temporally marked as a distinct "crossover" point. The fMRI activation was considered before and after this point. During successful transition into pre-sleep the period before the crossover was signified by alpha modulation that corresponded to decreased fMRI activity mainly in sensory gating related regions (e.g. medial thalamus). In parallel, although not sufficient for the transition, theta modulation corresponded with increased activity in limbic and autonomic control regions (e.g. hippocampus, cerebellum vermis, respectively). The post-crossover period was designated by alpha modulation further corresponding to reduced fMRI activity within the anterior salience network (e.g. anterior cingulate cortex, anterior insula), and in contrast theta modulation corresponded to the increased variance in the posterior salience network (e.g. posterior insula, posterior cingulate cortex). Our findings portray multi-level neural dynamics underlying the mental transition from awake to pre-sleep. To initiate the transition, decreased activity was required in external monitoring regions, and to sustain the transition, opposition between the anterior and posterior parts of the salience network was needed, reflecting shifting from extra- to intrapersonal based processing, respectively.
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Affiliation(s)
- Sivan Kinreich
- Department of Psychology, Tel Aviv University, Tel Aviv 6997801, Israel; Functional Brain Center, Wohl Institute for Advanced Imaging, Tel-Aviv Sourasky Medical Center, Tel Aviv 6423906, Israel
| | - Ilana Podlipsky
- Functional Brain Center, Wohl Institute for Advanced Imaging, Tel-Aviv Sourasky Medical Center, Tel Aviv 6423906, Israel
| | - Shahar Jamshy
- School of Computer Science, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Nathan Intrator
- School of Computer Science, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Talma Hendler
- Department of Psychology, Tel Aviv University, Tel Aviv 6997801, Israel; Department of Physiology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel; Functional Brain Center, Wohl Institute for Advanced Imaging, Tel-Aviv Sourasky Medical Center, Tel Aviv 6423906, Israel.
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Albouy G, King BR, Maquet P, Doyon J. Hippocampus and striatum: Dynamics and interaction during acquisition and sleep-related motor sequence memory consolidation. Hippocampus 2013; 23:985-1004. [DOI: 10.1002/hipo.22183] [Citation(s) in RCA: 171] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/29/2013] [Indexed: 02/05/2023]
Affiliation(s)
- Geneviève Albouy
- Functional Neuroimaging Unit, C.R.I.U.G.M.; Montreal Quebec Canada
- Department of Psychology; University of Montreal; Montreal Quebec Canada
| | - Bradley R. King
- Functional Neuroimaging Unit, C.R.I.U.G.M.; Montreal Quebec Canada
- Department of Psychology; University of Montreal; Montreal Quebec Canada
| | - Pierre Maquet
- Cyclotron Research Centre, University of Liège; Liège Belgium
| | - Julien Doyon
- Functional Neuroimaging Unit, C.R.I.U.G.M.; Montreal Quebec Canada
- Department of Psychology; University of Montreal; Montreal Quebec Canada
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20
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Caveats on psychological models of sleep and memory: A compass in an overgrown scenario. Sleep Med Rev 2013; 17:105-21. [DOI: 10.1016/j.smrv.2012.04.001] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2011] [Revised: 04/02/2012] [Accepted: 04/02/2012] [Indexed: 12/20/2022]
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21
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Sleep improves memory: the effect of sleep on long term memory in early adolescence. PLoS One 2012; 7:e42191. [PMID: 22879917 PMCID: PMC3413705 DOI: 10.1371/journal.pone.0042191] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2012] [Accepted: 07/04/2012] [Indexed: 12/02/2022] Open
Abstract
Sleep plays an important role in the consolidation of memory. This has been most clearly shown in adults for procedural memory (i.e. skills and procedures) and declarative memory (e.g. recall of facts). The effects of sleep and memory are relatively unstudied in adolescents. Declarative memory is important in school performance and consequent social functioning in adolescents. This is the first study to specifically examine the effects of normal sleep on auditory declarative memory in an early adolescent sample. Given that the majority of adolescents do not obtain the recommended amount of sleep, it is critical to study the cognitive effects of normal sleep. Forty male and female normal, healthy adolescents between the ages of ten and fourteen years old were randomly assigned to sleep and no sleep conditions. Subjects were trained on a paired-associate declarative memory task and a control working memory task at 9am, and tested at night (12 hours later) without sleep. The same number of subjects was trained at 9pm and tested 9am following sleep. An increase of 20.6% in declarative memory, as measured by the number correct in a paired-associate test, following sleep was observed compared to the group which was tested at the same time interval without sleep (p<0.03). The performance on the control working memory task that involved encoding and memoranda manipulation was not affected by time of day or relationship to sleep. Declarative memory is significantly improved by sleep in a sample of normal adolescents.
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Abstract
In most animals, sleep is considered a global brain and behavioral state. However, recent intracortical recordings have shown that aspects of non-rapid eye movement (NREM) sleep and wakefulness can occur simultaneously in different parts of the cortex in mammals, including humans. Paradoxically, however, NREM sleep still manifests as a global behavioral shutdown. In this review, the authors examine this paradox from an evolutionary perspective. On the basis of strategic modeling, they suggest that in animals with brains composed of heavily interconnected and functionally interdependent units, a global regulator of sleep maintains the behavioral shutdown that defines sleep and thereby ensures that local use-dependent functions are performed in a safe and efficient manner. This novel perspective has implications for understanding deficits in human cognitive performance resulting from sleep deprivation, sleep disorders such as sleepwalking, changes in consciousness that occur during sleep, and the function of sleep itself.
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Ferrara M, Moroni F, De Gennaro L, Nobili L. Hippocampal sleep features: relations to human memory function. Front Neurol 2012; 3:57. [PMID: 22529835 PMCID: PMC3327976 DOI: 10.3389/fneur.2012.00057] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2011] [Accepted: 03/28/2012] [Indexed: 02/05/2023] Open
Abstract
The recent spread of intracranial electroencephalographic (EEG) recording techniques for presurgical evaluation of drug-resistant epileptic patients is providing new information on the activity of different brain structures during both wakefulness and sleep. The interest has been mainly focused on the medial temporal lobe, and in particular the hippocampal formation, whose peculiar local sleep features have been recently described, providing support to the idea that sleep is not a spatially global phenomenon. The study of the hippocampal sleep electrophysiology is particularly interesting because of its central role in the declarative memory formation. Recent data indicate that sleep contributes to memory formation. Therefore, it is relevant to understand whether specific patterns of activity taking place during sleep are related to memory consolidation processes. Fascinating similarities between different states of consciousness (wakefulness, REM sleep, non-REM sleep) in some electrophysiological mechanisms underlying cognitive processes have been reported. For instance, large-scale synchrony in gamma activity is important for waking memory and perception processes, and its changes during sleep may be the neurophysiological substrate of sleep-related deficits of declarative memory. Hippocampal activity seems to specifically support memory consolidation during sleep, through specific coordinated neurophysiological events (slow waves, spindles, ripples) that would facilitate the integration of new information into the pre-existing cortical networks. A few studies indeed provided direct evidence that rhinal ripples as well as slow hippocampal oscillations are correlated with memory consolidation in humans. More detailed electrophysiological investigations assessing the specific relations between different types of memory consolidation and hippocampal EEG features are in order. These studies will add an important piece of knowledge to the elucidation of the ultimate sleep function.
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Affiliation(s)
- Michele Ferrara
- Department of Health Sciences, University of L'Aquila L'Aquila, Italy
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24
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Slow EEG rhythms and inter-hemispheric synchronization across sleep and wakefulness in the human hippocampus. Neuroimage 2012; 60:497-504. [PMID: 22178807 DOI: 10.1016/j.neuroimage.2011.11.093] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2011] [Revised: 11/29/2011] [Accepted: 11/30/2011] [Indexed: 02/08/2023] Open
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25
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Nobili L, De Gennaro L, Proserpio P, Moroni F, Sarasso S, Pigorini A, De Carli F, Ferrara M. Local aspects of sleep. PROGRESS IN BRAIN RESEARCH 2012; 199:219-232. [DOI: 10.1016/b978-0-444-59427-3.00013-7] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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26
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De Gennaro L, Marzano C, Cipolli C, Ferrara M. How we remember the stuff that dreams are made of: Neurobiological approaches to the brain mechanisms of dream recall. Behav Brain Res 2012; 226:592-6. [PMID: 22024432 DOI: 10.1016/j.bbr.2011.10.017] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2011] [Accepted: 10/11/2011] [Indexed: 02/05/2023]
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27
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Prehn-Kristensen A, Molzow I, Munz M, Wilhelm I, Müller K, Freytag D, Wiesner CD, Baving L. Sleep restores daytime deficits in procedural memory in children with attention-deficit/hyperactivity disorder. RESEARCH IN DEVELOPMENTAL DISABILITIES 2011; 32:2480-2488. [PMID: 21820271 DOI: 10.1016/j.ridd.2011.06.021] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2011] [Accepted: 06/24/2011] [Indexed: 05/31/2023]
Abstract
Sleep supports the consolidation of declarative and procedural memory. While prefrontal cortex (PFC) activity supports the consolidation of declarative memory during sleep, opposite effects of PFC activity are reported with respect to the consolidation of procedural memory during sleep. Patients with attention-deficit/hyperactivity disorder (ADHD) are characterised by a prefrontal hypoactivity. Therefore, we hypothesised that children with ADHD benefit from sleep with respect to procedural memory more than healthy children. Sixteen children with ADHD and 16 healthy controls (aged 9-12) participated in this study. A modification of the serial-reaction-time task was conducted. In the sleep condition, learning took place in the evening and retrieval after a night of sleep, whereas in the wake condition learning took place in the morning and retrieval in the evening without sleep. Children with ADHD showed an improvement in motor skills after sleep compared to the wake condition. Sleep-associated gain in reaction times was positively correlated with the amount of sleep stage 4 and REM-density in ADHD. As expected, sleep did not benefit motor performance in the group of healthy children. These data suggest that sleep in ADHD normalizes deficits in procedural memory observed during daytime. It is discussed whether in patients with ADHD attenuated prefrontal control enables sleep-dependent gains in motor skills by reducing the competitive interference between explicit and implicit components within a motor task.
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Affiliation(s)
- Alexander Prehn-Kristensen
- Center for Integrative Psychiatry, Department of Child and Adolescent Psychiatry and Psychotherapy, Christian-Albrechts-University School of Medicine, 24105 Kiel, Germany.
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Spoormaker VI, Czisch M, Maquet P, Jäncke L. Large-scale functional brain networks in human non-rapid eye movement sleep: insights from combined electroencephalographic/functional magnetic resonance imaging studies. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2011; 369:3708-3729. [PMID: 21893524 DOI: 10.1098/rsta.2011.0078] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This paper reviews the existing body of knowledge on the neural correlates of spontaneous oscillations, functional connectivity and brain plasticity in human non-rapid eye movement (NREM) sleep. The first section reviews the evidence that specific sleep events as slow waves and spindles are associated with transient increases in regional brain activity. The second section describes the changes in functional connectivity during NREM sleep, with a particular focus on changes within a low-frequency, large-scale functional brain network. The third section will discuss the possibility that spontaneous oscillations and differential functional connectivity are related to brain plasticity and systems consolidation, with a particular focus on motor skill acquisition. Implications for the mode of information processing per sleep stage and future experimental studies are discussed.
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Affiliation(s)
- Victor I Spoormaker
- RG Neuroimaging, Max Planck Institute of Psychiatry, Kraepelinstrasse 2-10, 80804 Munich, Germany.
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Bruni O, Ferri R, Novelli L, Finotti E, Terribili M, Troianiello M, Valente D, Sabatello U, Curatolo P. Slow EEG amplitude oscillations during NREM sleep and reading disabilities in children with dyslexia. Dev Neuropsychol 2010; 34:539-51. [PMID: 20183717 DOI: 10.1080/87565640903133418] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
STUDY OBJECTIVES To analyze non-rapid eye movement (NREM) sleep microstructure of children with dyslexia, by means of cyclic alternating pattern (CAP) analysis and to correlate CAP parameters with neuropsychological measures. DESIGN Cross-sectional study using polysomnographic recordings and neuropsychological assessments. SETTING Sleep laboratory in academic center. PARTICIPANTS Sixteen subjects with developmental dyslexia (mean age 10.8 years) and 11 normally reading children (mean age 10.1 years) underwent overnight polysomnographic recording. INTERVENTION N/A. MEASUREMENTS AND RESULTS Sleep architecture parameters only showed some statistically significant differences: number of sleep stage shifts per hour of sleep, percentage of N3, and number of R periods were significantly lower in dyslexic children versus controls. CAP analysis revealed a higher total CAP rate and A1 index in stage N3. A2% and A2 index in stage N2 and N3 were lower in dyslexic children while no differences were found for A3 CAP subtypes. The correlation analysis between CAP parameters and cognitive-behavioral measures showed a significant positive correlation between A1 index in N3 with Verbal IQ, full-scale IQ, and Memory and Learning Transfer reading test; while CAP rate in N3 was positively correlated with verbal IQ. CONCLUSIONS To overcome reading difficulties, dyslexic subjects overactivate thalamocortical and hippocampal circuitry to transfer information between cortical posterior and anterior areas. The overactivation of the ancillary frontal areas could account for the CAP rate modifications and mainly for the increase of CAP rate and of A1 index in N3 that seem to be correlated with IQ and reading abilities.
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Affiliation(s)
- Oliviero Bruni
- Department of Developmental Neurology and Psychiatry, Sapienza University, Rome, Italy
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Määttä S, Landsness E, Sarasso S, Ferrarelli F, Ferreri F, Ghilardi MF, Tononi G. The effects of morning training on night sleep: a behavioral and EEG study. Brain Res Bull 2010; 82:118-23. [PMID: 20105456 DOI: 10.1016/j.brainresbull.2010.01.006] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2009] [Accepted: 01/12/2010] [Indexed: 11/19/2022]
Abstract
The consolidation of memories in a variety of learning processes benefits from post-training sleep, and recent work has suggested a role for sleep slow wave activity (SWA). Previous studies using a visuomotor learning task showed a local increase in sleep SWA in right parietal cortex, which was correlated with post-sleep performance enhancement. In these as in most similar studies, learning took place in the evening, shortly before sleep. Thus, it is currently unknown whether learning a task in the morning, followed by the usual daily activities, would also result in a local increase in sleep SWA during the night, and in a correlated enhancement in performance the next day. To answer this question, a group of subjects performed a visuomotor learning task in the morning and was retested the following morning. Whole night sleep was recorded with high-density EEG. We found an increase of SWA over the right posterior parietal areas that was most evident during the second sleep cycle. Performance improved significantly the following morning, and the improvement was positively correlated with the SWA increase in the second sleep cycle. These results suggest that training-induced changes in sleep SWA and post-sleep improvements do not depend upon the time interval between original training and sleep.
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Affiliation(s)
- Sara Määttä
- Department of Psychiatry, University of Wisconsin, Madison, WI 53719, USA
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31
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Nishida M, Sood S, Asano E. In-vivo animation of midazolam-induced electrocorticographic changes in humans. J Neurol Sci 2009; 287:151-8. [PMID: 19733366 DOI: 10.1016/j.jns.2009.08.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2009] [Revised: 08/04/2009] [Accepted: 08/06/2009] [Indexed: 11/24/2022]
Abstract
Previous human studies have demonstrated that midazolam-induced signal changes on scalp EEG recording include widespread augmentation of sigma-oscillations and that the amplitude of such oscillations is correlated to the severity of midazolam-induced amnesia. Still unanswered questions include whether midazolam-induced sigma-augmentation also involves the medial temporal region, which plays a role in memory encoding. Taking advantage of rare and unique opportunities to monitor neuronal activities using intracranial electrocorticography (ECoG) recording, we determined how intravenous administration of midazolam elicited spectral frequency changes in the human cerebral cortex, including the medial temporal region. We studied three children with focal epilepsy who underwent subdural electrode placement and extraoperative ECoG recording for subsequent resection of the seizure focus; an intravenous bolus of midazolam was given to abort an ongoing simple partial seizure or to provide sedation prior to induction of general anesthesia. 'Midazolam-induced ECoG frequency alteration' in sites distant from the seizure focus was sequentially animated on their individual three-dimensional MR images. The common ECoG changes induced by midazolam included gradual augmentation of sigma-oscillations (12-16 Hz) in the widespread non-epileptic regions, including the medial temporal region. The spatial and temporal alteration of ECoG spectral frequency pattern can be appreciated via animation movies. Midazolam-induced sigma-augmentation was observed in the medial temporal region in our relatively small cohort of human subjects. In-vivo animation of ECoG spectral measures provided a unique situation to study the effect of midazolam on neuronal processing in the deep brain regions.
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Affiliation(s)
- Masaaki Nishida
- Dept of Pediatrics, Children's Hospital of Michigan, Wayne State University, Detroit, Michigan 48201, USA
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Affiliation(s)
- Manuel Schabus
- Department of Physiological Psychology, Institute of Psychology, University of Salzburg, Salzburg, Austria.
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