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McKinnon AC, Hickie IB, Scott J, Duffy SL, Norrie L, Terpening Z, Grunstein RR, Lagopoulos J, Batchelor J, Lewis SJG, Shine JM, Naismith SL. Current sleep disturbance in older people with a lifetime history of depression is associated with increased connectivity in the Default Mode Network. J Affect Disord 2018; 229:85-94. [PMID: 29306697 DOI: 10.1016/j.jad.2017.12.052] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 09/13/2017] [Accepted: 12/27/2017] [Indexed: 01/05/2023]
Abstract
BACKGROUND The present study investigated Default Mode Network (DMN) functional connectivity in subjects with a lifetime history of major depression, comparing those with and without current sleep disturbance. Controls were included to assess DMN abnormalities specific to depression. METHODS A total of 93 adults aged 50 years and over were recruited from the Healthy Brain Ageing Clinic at the Brain and Mind Centre, Sydney, Australia. The sample comprised two groups, including 22 controls and 71 participants with a lifetime history of DSM-IV major depression (with depressive episode current or remitted). 52 of those with a lifetime history of depression also met criteria for Mild Cognitive Impairment (MCI). Participants underwent resting-state fMRI along with comprehensive psychiatric, neuropsychological, and medical assessment. Subjective sleep quality was assessed via the Pittsburgh Sleep Quality Index (PSQI). Sleep disturbance was defined as a PSQI score > 5. A total of 68% (n = 48) of cases with a lifetime history of depression met criteria for sleep-disturbance. DMN functional connectivity was assessed via ROI-to-ROI analyses. RESULTS Relative to controls, those with lifetime major depression demonstrated significantly increased functional connectivity between the ventromedial prefrontal cortex and the temporal pole. Within the depression group (n = 48), those with current sleep disturbance had significantly increased connectivity between the anterior medial prefrontal cortex and both the parahippocampal cortex and the hippocampal formation, relative to those without sleep disturbance (n = 23). These results were present after controlling for MCI diagnosis. CONCLUSIONS Current sleep disturbance together with depression is associated with distinct abnormalities in DMN functioning incorporating regions responsible for self-reflection and declarative memory processes. Impaired sleep is associated with increased connectivity between these regions. Future studies may augment these findings with complementary imaging techniques including cortical thickness and diffusion tensor imaging, as well as high density electroencephalogram recording.
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Affiliation(s)
- Andrew C McKinnon
- Healthy Brain Ageing Program, Australia; Department of Psychology, Macquarie University, Australia
| | | | - Jan Scott
- Healthy Brain Ageing Program, Australia
| | - Shantel L Duffy
- Healthy Brain Ageing Program, Australia; Central Clinical School, Faculty of Medicine, The University of Sydney, Australia
| | | | | | | | - Jim Lagopoulos
- Healthy Brain Ageing Program, Australia; Sunshine Coast Mind and Neuroscience - Thompson Institute, University of The Sunshine Coast, QLD, Australia
| | | | | | | | - Sharon L Naismith
- Healthy Brain Ageing Program, Australia; School of Psychology, Australia; Charles Perkins Centre and Brain and Mind Centre, The University of Sydney, Australia.
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Gamma-hydroxybutyrate increases brain resting-state functional connectivity of the salience network and dorsal nexus in humans. Neuroimage 2018. [PMID: 29524621 DOI: 10.1016/j.neuroimage.2018.03.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
According to the triple network hypothesis the brain is equipped with three core neurocognitive networks: the default mode (DMN), the salience (SN), and the central executive (CEN) network. Moreover, the so called dorsal nexus, has met growing interest as it is a hub region connecting these three networks. Assessment of resting-state functional connectivity (rsFC) of these networks enables the elucidation of drug-induced brain alterations. Gamma-hydroxybutyrate (GHB) is a GHB/GABA-B receptor agonist that induces a paradoxical state of mixed stimulation and sedation at moderate doses, which makes it a valuable tool to investigate neural signatures of subjective drug effects. Employing a placebo-controlled, double-blind, randomized, cross-over design, we assessed the effects of GHB (35 mg/kg p. o.) in 19 healthy male subjects on DMN-, SN-, CEN-, and dorsal nexus-rsFC measured by functional magnet resonance imaging and applying independent component as well as seed-based analyses, while subjective drug effects were investigated using visual analog scales (VAS). Subjectively, GHB increased VAS ratings of a general drug effect, stimulation, and sedation. Intrinsic DMN-, and CEN-rsFC remained largely unchanged under GHB, but the drug increased SN-DMN-rsFC and SN-dorsal nexus-rsFC, while dorsal nexus-rsFC was reciprocally increased to both the SN (right anterior insula) and to the CEN (right middle frontal gyrus). Increased sedation significantly predicted the observed SN-dorsal nexus-rsFC. In conclusion, GHB generates a unique stimulant/sedative subjective state that is paralleled by a complex pattern of increased functional connectivity encompassing all three core neurocognitive networks of the brain, while increased SN-dorsal nexus-rsFC was demonstrated to be a potential signature of the sedative component of the drug effect.
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53
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Zhang J, Lau EYY, Hsiao JH. Sleep deprivation compromises resting‐state emotional regulatory processes: AnEEGstudy. J Sleep Res 2018; 28:e12671. [DOI: 10.1111/jsr.12671] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 12/22/2017] [Accepted: 01/08/2018] [Indexed: 11/27/2022]
Affiliation(s)
- Jinxiao Zhang
- Department of Psychology The University of Hong Kong Hong Kong
| | - Esther Yuet Ying Lau
- Department of Psychology The Education University of Hong Kong Hong Kong
- Centre for Psychosocial Health The Education University of Hong Kong Hong Kong
| | - Janet H. Hsiao
- Department of Psychology The University of Hong Kong Hong Kong
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54
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Chung SJ, Choi YH, Kwon H, Park YH, Yun HJ, Yoo HS, Moon SH, Ye BS, Sohn YH, Lee JM, Lee PH. Sleep Disturbance May Alter White Matter and Resting State Functional Connectivities in Parkinson's Disease. Sleep 2017; 40:2962411. [PMID: 28364425 DOI: 10.1093/sleep/zsx009] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Study Objectives To clarify whether sleep disturbance would alter the patterns of structural and functional networks underlying cognitive dysfunction in patients with Parkinson's disease (PD). Methods Among the 180 patients with nondemented PD in our cohort, 45 patients were classified as the group with sleep disturbance according to the 5-item scales for outcomes in Parkinson's disease nighttime scale. Based on propensity scores, another 45 PD patients without sleep disturbance were matched to this group. We performed a comparative analysis of cortical thickness, diffusion tensor imaging-based white matter integrity, resting-state functional connectivity, and cognitive performance between PD patients with and without sleep disturbance. Results PD patients with sleep disturbance showed poorer performance in attention and working memory and a tendency toward a lower score in frontal executive function relative to those without sleep disturbance. The PD with sleep disturbance group exhibited widespread white matter disintegration compared to the PD without sleep disturbance group, although there were no significant differences in cortical thickness between the PD subgroups. On functional network analysis, PD patients with sleep disturbance exhibited less severely decreased cortical functional connectivity within the default mode network, central executive network, and dorsal attention network when compared to those without sleep disturbance. Conclusions The present study suggests that sleep disturbance in PD patients could be associated with white matter and functional network alterations in conjunction with cognitive impairment.
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Affiliation(s)
- Seok Jong Chung
- Department of Neurology, Yonsei University College of Medicine, Seoul, South Korea.,Jangseong Public Health Center, Jangseong, South Korea
| | - Yong-Ho Choi
- Department of Biomedical Engineering, Hanyang University, Seoul, South Korea
| | - Hunki Kwon
- Department of Biomedical Engineering, Hanyang University, Seoul, South Korea
| | - Yeong-Hun Park
- Department of Biomedical Engineering, Hanyang University, Seoul, South Korea
| | - Hyuk Jin Yun
- Department of Biomedical Engineering, Hanyang University, Seoul, South Korea
| | - Han Soo Yoo
- Department of Neurology, Yonsei University College of Medicine, Seoul, South Korea
| | | | - Byoung Seok Ye
- Department of Neurology, Yonsei University College of Medicine, Seoul, South Korea
| | - Young H Sohn
- Department of Neurology, Yonsei University College of Medicine, Seoul, South Korea
| | - Jong-Min Lee
- Department of Biomedical Engineering, Hanyang University, Seoul, South Korea
| | - Phil Hyu Lee
- Department of Neurology, Yonsei University College of Medicine, Seoul, South Korea.,Severance Biomedical Science Institute, Yonsei University College of Medicine, Seoul, South Korea
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55
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The large-scale functional connectivity correlates of consciousness and arousal during the healthy and pathological human sleep cycle. Neuroimage 2017; 160:55-72. [DOI: 10.1016/j.neuroimage.2017.06.026] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 06/08/2017] [Accepted: 06/11/2017] [Indexed: 01/10/2023] Open
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56
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Nilsonne G, Tamm S, Schwarz J, Almeida R, Fischer H, Kecklund G, Lekander M, Fransson P, Åkerstedt T. Intrinsic brain connectivity after partial sleep deprivation in young and older adults: results from the Stockholm Sleepy Brain study. Sci Rep 2017; 7:9422. [PMID: 28842597 PMCID: PMC5573389 DOI: 10.1038/s41598-017-09744-7] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 07/31/2017] [Indexed: 12/13/2022] Open
Abstract
Sleep deprivation has been reported to affect intrinsic brain connectivity, notably reducing connectivity in the default mode network. Studies to date have however shown inconsistent effects, in many cases lacked monitoring of wakefulness, and largely included young participants. We investigated effects of sleep deprivation on intrinsic brain connectivity in young and older participants. Participants aged 20–30 (final n = 30) and 65–75 (final n = 23) years underwent partial sleep deprivation (3 h sleep) in a cross-over design, with two 8-minutes eyes-open resting state functional magnetic resonance imaging (fMRI) runs in each session, monitored by eye-tracking. We assessed intrinsic brain connectivity using independent components analysis (ICA) as well as seed-region analyses of functional connectivity, and also analysed global signal variability, regional homogeneity, and the amplitude of low-frequency fluctuations. Sleep deprivation caused increased global signal variability. Changes in investigated resting state networks and in regional homogeneity were not statistically significant. Younger participants had higher connectivity in most examined networks, as well as higher regional homogeneity in areas including anterior and posterior cingulate cortex. In conclusion, we found that sleep deprivation caused increased global signal variability, and we speculate that this may be caused by wake-state instability.
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Affiliation(s)
- Gustav Nilsonne
- Stockholm University, Stress Research Institute, Stockholm, Sweden. .,Karolinska Institutet, Department of Clinical Neuroscience, Stockholm, Sweden.
| | - Sandra Tamm
- Stockholm University, Stress Research Institute, Stockholm, Sweden.,Karolinska Institutet, Department of Clinical Neuroscience, Stockholm, Sweden
| | - Johanna Schwarz
- Stockholm University, Stress Research Institute, Stockholm, Sweden.,Karolinska Institutet, Department of Clinical Neuroscience, Stockholm, Sweden
| | - Rita Almeida
- Karolinska Institutet, Department of Neuroscience, Stockholm, Sweden
| | - Håkan Fischer
- Stockholm University, Department of Psychology, Stockholm, Sweden
| | - Göran Kecklund
- Stockholm University, Stress Research Institute, Stockholm, Sweden
| | - Mats Lekander
- Stockholm University, Stress Research Institute, Stockholm, Sweden.,Karolinska Institutet, Department of Clinical Neuroscience, Stockholm, Sweden
| | - Peter Fransson
- Karolinska Institutet, Department of Clinical Neuroscience, Stockholm, Sweden
| | - Torbjörn Åkerstedt
- Stockholm University, Stress Research Institute, Stockholm, Sweden.,Karolinska Institutet, Department of Clinical Neuroscience, Stockholm, Sweden
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57
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Tüshaus L, Balsters JH, Schläpfer A, Brandeis D, O’Gorman Tuura R, Achermann P. Resisting Sleep Pressure: Impact on Resting State Functional Network Connectivity. Brain Topogr 2017; 30:757-773. [DOI: 10.1007/s10548-017-0575-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Accepted: 07/06/2017] [Indexed: 12/26/2022]
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58
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Abstract
Sleep habits developed in adolescence shape long-term trajectories of psychological, educational, and physiological well-being. Adolescents’ sleep behaviors are shaped by their parents’ sleep at both the behavioral and biological levels. In the current study, we sought to examine how neural concordance in resting-state functional connectivity between parent-child dyads is associated with dyadic concordance in sleep duration and adolescents’ sleep quality. To this end, we scanned both parents and their child (N = 28 parent-child dyads; parent Mage = 42.8 years; adolescent Mage = 14.9 years; 14.3% father; 46.4% female adolescent) as they each underwent a resting-state scan. Using daily diaries, we also assessed dyadic concordance in sleep duration across two weeks. Our results show that greater daily concordance in sleep behavior is associated with greater neural concordance in default-mode network connectivity between parents and children. Moreover, greater neural and behavioral concordances in sleep is associated with more optimal sleep quality in adolescents. The current findings expand our understanding of dyadic concordance by providing a neurobiological mechanism by which parents and children share daily sleep behaviors.
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Affiliation(s)
- Tae-Ho Lee
- Department of Psychology and Neuroscience, The University of North Carolina at Chapel Hill (UNC), NC 27599, USA
| | - Michelle E Miernicki
- Department of Psychology, The University of Illinois at Urbana-Champaign (UIUC), IL 61801, USA; Human Resources and Industrial Relations, UIUC, IL 61801, USA
| | - Eva H Telzer
- Department of Psychology and Neuroscience, The University of North Carolina at Chapel Hill (UNC), NC 27599, USA; Department of Psychology, The University of Illinois at Urbana-Champaign (UIUC), IL 61801, USA.
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59
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Abstract
How does a lack of sleep affect our brains? In contrast to the benefits of sleep, frameworks exploring the impact of sleep loss are relatively lacking. Importantly, the effects of sleep deprivation (SD) do not simply reflect the absence of sleep and the benefits attributed to it; rather, they reflect the consequences of several additional factors, including extended wakefulness. With a focus on neuroimaging studies, we review the consequences of SD on attention and working memory, positive and negative emotion, and hippocampal learning. We explore how this evidence informs our mechanistic understanding of the known changes in cognition and emotion associated with SD, and the insights it provides regarding clinical conditions associated with sleep disruption.
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60
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Fang Z, Rao H. Imaging homeostatic sleep pressure and circadian rhythm in the human brain. J Thorac Dis 2017; 9:E495-E498. [PMID: 28616320 PMCID: PMC5465131 DOI: 10.21037/jtd.2017.03.168] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2017] [Accepted: 03/17/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Zhuo Fang
- Laboratory of Applied Brain and Cognitive Sciences, Shanghai International Studies University, Shanghai 200000, China
- Center for Functional Neuroimaging, Department of Neurology, University of Pennsylvania, Philadelphia, PA, USA
| | - Hengyi Rao
- Laboratory of Applied Brain and Cognitive Sciences, Shanghai International Studies University, Shanghai 200000, China
- Center for Functional Neuroimaging, Department of Neurology, University of Pennsylvania, Philadelphia, PA, USA
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61
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Ben Simon E, Maron-Katz A, Lahav N, Shamir R, Hendler T. Tired and misconnected: A breakdown of brain modularity following sleep deprivation. Hum Brain Mapp 2017; 38:3300-3314. [PMID: 28370703 DOI: 10.1002/hbm.23596] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 02/10/2017] [Accepted: 03/20/2017] [Indexed: 12/18/2022] Open
Abstract
Sleep deprivation (SD) critically affects a range of cognitive and affective functions, typically assessed during task performance. Whether such impairments stem from changes to the brain's intrinsic functional connectivity remain largely unknown. To examine this hypothesis, we applied graph theoretical analysis on resting-state fMRI data derived from 18 healthy participants, acquired during both sleep-rested and sleep-deprived states. We hypothesized that parameters indicative of graph connectivity, such as modularity, will be impaired by sleep deprivation and that these changes will correlate with behavioral outcomes elicited by sleep loss. As expected, our findings point to a profound reduction in network modularity without sleep, evident in the limbic, default-mode, salience and executive modules. These changes were further associated with behavioral impairments elicited by SD: a decrease in salience module density was associated with worse task performance, an increase in limbic module density was predictive of stronger amygdala activation in a subsequent emotional-distraction task and a shift in frontal hub lateralization (from left to right) was associated with increased negative mood. Altogether, these results portray a loss of functional segregation within the brain and a shift towards a more random-like network without sleep, already detected in the spontaneous activity of the sleep-deprived brain. Hum Brain Mapp 38:3300-3314, 2017. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Eti Ben Simon
- Functional Brain Center, Wohl Institute for Advanced Imaging Tel-Aviv Sourasky Medical Center, Tel Aviv, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Adi Maron-Katz
- Functional Brain Center, Wohl Institute for Advanced Imaging Tel-Aviv Sourasky Medical Center, Tel Aviv, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Nir Lahav
- Department of Physics, Bar-Ilan University, Ramat Gan, Israel
| | - Ron Shamir
- Blavatnik School of Computer Science, Tel-Aviv University, Tel-Aviv, Israel
| | - Talma Hendler
- Functional Brain Center, Wohl Institute for Advanced Imaging Tel-Aviv Sourasky Medical Center, Tel Aviv, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,School of Psychological Sciences, Tel Aviv University, Tel-Aviv, Israel.,Sagol school of Neuroscience, Tel Aviv University, Tel Aviv, Israel
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62
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McKinnon AC, Duffy SL, Cross NE, Terpening Z, Grunstein RR, Lagopoulos J, Batchelor J, Hickie IB, Lewis SJ, Shine JM, Naismith SL. Functional Connectivity in the Default Mode Network is Reduced in Association with Nocturnal Awakening in Mild Cognitive Impairment. J Alzheimers Dis 2017; 56:1373-1384. [DOI: 10.3233/jad-160922] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Andrew C. McKinnon
- Healthy Brain Ageing Program, The University of Sydney, Camperdown NSW, Australia
- Department of Psychology, Macquarie University, Sydney NSW, Australia
| | - Shantel L. Duffy
- Healthy Brain Ageing Program, The University of Sydney, Camperdown NSW, Australia
- Charles Perkins Centre and Brain and Mind Centre, The University of Sydney, Camperdown NSW, Australia
| | - Nathan E. Cross
- Healthy Brain Ageing Program, The University of Sydney, Camperdown NSW, Australia
- Woolcock Institute of Medical Research, Glebe NSW, Australia
| | - Zoe Terpening
- Healthy Brain Ageing Program, The University of Sydney, Camperdown NSW, Australia
| | | | - Jim Lagopoulos
- Healthy Brain Ageing Program, The University of Sydney, Camperdown NSW, Australia
| | | | - Ian B. Hickie
- Healthy Brain Ageing Program, The University of Sydney, Camperdown NSW, Australia
| | - Simon J.G. Lewis
- Healthy Brain Ageing Program, The University of Sydney, Camperdown NSW, Australia
| | - James M. Shine
- Healthy Brain Ageing Program, The University of Sydney, Camperdown NSW, Australia
| | - Sharon L. Naismith
- Healthy Brain Ageing Program, The University of Sydney, Camperdown NSW, Australia
- School of Psychology, The University of Sydney, Camperdown NSW, Australia
- Charles Perkins Centre and Brain and Mind Centre, The University of Sydney, Camperdown NSW, Australia
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63
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Bu L, Zhang M, Li J, Li F, Liu H, Li Z. Effects of Sleep Deprivation on Phase Synchronization as Assessed by Wavelet Phase Coherence Analysis of Prefrontal Tissue Oxyhemoglobin Signals. PLoS One 2017; 12:e0169279. [PMID: 28046043 PMCID: PMC5207699 DOI: 10.1371/journal.pone.0169279] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Accepted: 12/14/2016] [Indexed: 11/21/2022] Open
Abstract
Purpose To reveal the physiological mechanism of the decline in cognitive function after sleep deprivation, a within-subject study was performed to assess sleep deprivation effects on phase synchronization, as revealed by wavelet phase coherence (WPCO) analysis of prefrontal tissue oxyhemoglobin signals. Materials and Methods Twenty subjects (10 male and 10 female, 25.5 ± 3.5 years old) were recruited to participate in two tests: one without sleep deprivation (group A) and the other with 24 h of sleep deprivation (group B). Before the test, each subject underwent a subjective evaluation using visual analog scales. A cognitive task was performed by judging three random numbers. Continuous recordings of the near-infrared spectroscopy (NIRS) signals were obtained from both the left and right prefrontal lobes during rest, task, and post-task periods. The WPCO of cerebral Delta [HbO2] signals were analyzed for these three periods for both groups A and B. Results Six frequency intervals were defined: I: 0.6–2 Hz (cardiac activity), II: 0.145–0.6 Hz (respiratory activity), III: 0.052–0.145 Hz (myogenic activity), IV: 0.021–0.052 Hz (neurogenic activity), V: 0.0095–0.021 Hz (nitric oxide related endothelial activity) and VI: 0.005–0.0095 Hz (non-nitric oxide related endothelial activity). WPCO in intervals III (F = 5.955, p = 0.02) and V (F = 4.7, p = 0.037) was significantly lower in group B than in group A at rest. During the task period, WPCO in intervals III (F = 5.175, p = 0.029) and IV (F = 4.585, p = 0.039) was significantly lower in group B compared with group A. In the post-task recovery period, the WPCO in interval III (F = 6.125, p = 0.02) was significantly lower in group B compared with group A. Reaction time was significantly prolonged, and the accuracy rate and F1 score both declined after sleep deprivation. Conclusions The decline in WPCO after sleep deprivation indicates reduced phase synchronization between left and right prefrontal oxyhemoglobin oscillations, which may contribute to the diminished cognitive function.
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Affiliation(s)
- Lingguo Bu
- Key Laboratory of High Efficiency and Clean Mechanical Manufacture, School of Mechanical Engineering, Shandong University, Jinan, P.R. China
| | - Ming Zhang
- Interdisciplinary Division of Biomedical Engineering, Faculty of Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong, SAR P.R. China
| | - Jianfeng Li
- Key Laboratory of High Efficiency and Clean Mechanical Manufacture, School of Mechanical Engineering, Shandong University, Jinan, P.R. China
| | - Fangyi Li
- Key Laboratory of High Efficiency and Clean Mechanical Manufacture, School of Mechanical Engineering, Shandong University, Jinan, P.R. China
| | - Heshan Liu
- Key Laboratory of High Efficiency and Clean Mechanical Manufacture, School of Mechanical Engineering, Shandong University, Jinan, P.R. China
| | - Zengyong Li
- Key Laboratory of Rehabilitation Aids Technology and System of the Ministry of Civil Affairs, National Research Center for Rehabilitation Technical Aids, Beijing, P.R. China
- * E-mail:
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64
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Schneider M, Hathway P, Leuchs L, Sämann PG, Czisch M, Spoormaker VI. Spontaneous pupil dilations during the resting state are associated with activation of the salience network. Neuroimage 2016; 139:189-201. [DOI: 10.1016/j.neuroimage.2016.06.011] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 05/19/2016] [Accepted: 06/08/2016] [Indexed: 12/25/2022] Open
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65
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Spontaneous eyelid closures link vigilance fluctuation with fMRI dynamic connectivity states. Proc Natl Acad Sci U S A 2016; 113:9653-8. [PMID: 27512040 DOI: 10.1073/pnas.1523980113] [Citation(s) in RCA: 140] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Fluctuations in resting-state functional connectivity occur but their behavioral significance remains unclear, largely because correlating behavioral state with dynamic functional connectivity states (DCS) engages probes that disrupt the very behavioral state we seek to observe. Observing spontaneous eyelid closures following sleep deprivation permits nonintrusive arousal monitoring. During periods of low arousal dominated by eyelid closures, sliding-window correlation analysis uncovered a DCS associated with reduced within-network functional connectivity of default mode and dorsal/ventral attention networks, as well as reduced anticorrelation between these networks. Conversely, during periods when participants' eyelids were wide open, a second DCS was associated with less decoupling between the visual network and higher-order cognitive networks that included dorsal/ventral attention and default mode networks. In subcortical structures, eyelid closures were associated with increased connectivity between the striatum and thalamus with the ventral attention network, and greater anticorrelation with the dorsal attention network. When applied to task-based fMRI data, these two DCS predicted interindividual differences in frequency of behavioral lapsing and intraindividual temporal fluctuations in response speed. These findings with participants who underwent a night of total sleep deprivation were replicated in an independent dataset involving partially sleep-deprived participants. Fluctuations in functional connectivity thus appear to be clearly associated with changes in arousal.
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66
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Tamaki M, Bang JW, Watanabe T, Sasaki Y. Night Watch in One Brain Hemisphere during Sleep Associated with the First-Night Effect in Humans. Curr Biol 2016; 26:1190-4. [PMID: 27112296 PMCID: PMC4864126 DOI: 10.1016/j.cub.2016.02.063] [Citation(s) in RCA: 125] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2015] [Revised: 01/21/2016] [Accepted: 02/24/2016] [Indexed: 01/23/2023]
Abstract
We often experience troubled sleep in a novel environment [1]. This is called the first-night effect (FNE) in human sleep research and has been regarded as a typical sleep disturbance [2-4]. Here, we show that the FNE is a manifestation of one hemisphere being more vigilant than the other as a night watch to monitor unfamiliar surroundings during sleep [5, 6]. Using advanced neuroimaging techniques [7, 8] as well as polysomnography, we found that the temporary sleep disturbance in the first sleep experimental session involves regional interhemispheric asymmetry of sleep depth [9]. The interhemispheric asymmetry of sleep depth associated with the FNE was found in the default-mode network (DMN) involved with spontaneous internal thoughts during wakeful rest [10, 11]. The degree of asymmetry was significantly correlated with the sleep-onset latency, which reflects the degree of difficulty of falling asleep and is a critical measure for the FNE. Furthermore, the hemisphere with reduced sleep depth showed enhanced evoked brain response to deviant external stimuli. Deviant external stimuli detected by the less-sleeping hemisphere caused more arousals and faster behavioral responses than those detected by the other hemisphere. None of these asymmetries were evident during subsequent sleep sessions. These lines of evidence are in accord with the hypothesis that troubled sleep in an unfamiliar environment is an act for survival over an unfamiliar and potentially dangerous environment by keeping one hemisphere partially more vigilant than the other hemisphere as a night watch, which wakes the sleeper up when unfamiliar external signals are detected.
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Affiliation(s)
- Masako Tamaki
- Department of Cognitive, Linguistic, and Psychological Sciences, Brown University, Box 1821, 190 Thayer Street, Providence, RI 02912, USA. TEL: 401-863-2727
| | - Ji Won Bang
- Department of Cognitive, Linguistic, and Psychological Sciences, Brown University, Box 1821, 190 Thayer Street, Providence, RI 02912, USA. TEL: 401-863-2727
| | - Takeo Watanabe
- Department of Cognitive, Linguistic, and Psychological Sciences, Brown University, Box 1821, 190 Thayer Street, Providence, RI 02912, USA. TEL: 401-863-2727
| | - Yuka Sasaki
- Department of Cognitive, Linguistic, and Psychological Sciences, Brown University, Box 1821, 190 Thayer Street, Providence, RI 02912, USA. TEL: 401-863-2727
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67
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Abstract
Thalamocortical connectivity is believed to underlie basic alertness, motor, sensory information processing, and attention processes. This connectivity appears to be disrupted by total sleep deprivation, but it is not known whether it is affected by normal variations in general daytime sleepiness in nonsleep deprived persons. Healthy adult participants completed the Epworth Sleepiness Scale and underwent resting-state functional MRI. Functional connectivity between the thalamus and other regions of the cortex was examined and correlated with Epworth Sleepiness Scale scores. Greater sleepiness was associated with inverse (i.e. lower or more negative) connectivity between the bilateral thalamus and cortical regions involved in somatosensory and motor functions, potentially reflecting the disengagement of sensory and motor processing from the stream of consciousness.
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Alonso JF, Romero S, Mañanas MA, Alcalá M, Antonijoan RM, Giménez S. Acute Sleep Deprivation Induces a Local Brain Transfer Information Increase in the Frontal Cortex in a Widespread Decrease Context. SENSORS (BASEL, SWITZERLAND) 2016; 16:E540. [PMID: 27089346 PMCID: PMC4851054 DOI: 10.3390/s16040540] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Revised: 04/05/2016] [Accepted: 04/12/2016] [Indexed: 01/24/2023]
Abstract
Sleep deprivation (SD) has adverse effects on mental and physical health, affecting the cognitive abilities and emotional states. Specifically, cognitive functions and alertness are known to decrease after SD. The aim of this work was to identify the directional information transfer after SD on scalp EEG signals using transfer entropy (TE). Using a robust methodology based on EEG recordings of 18 volunteers deprived from sleep for 36 h, TE and spectral analysis were performed to characterize EEG data acquired every 2 h. Correlation between connectivity measures and subjective somnolence was assessed. In general, TE showed medium- and long-range significant decreases originated at the occipital areas and directed towards different regions, which could be interpreted as the transfer of predictive information from parieto-occipital activity to the rest of the head. Simultaneously, short-range increases were obtained for the frontal areas, following a consistent and robust time course with significant maps after 20 h of sleep deprivation. Changes during sleep deprivation in brain network were measured effectively by TE, which showed increased local connectivity and diminished global integration. TE is an objective measure that could be used as a potential measure of sleep pressure and somnolence with the additional property of directed relationships.
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Affiliation(s)
- Joan F Alonso
- Biomedical Engineering Research Centre, Department of Automatic Control, Universitat Politècnica de Catalunya, Barcelona 08028, Spain.
- Barcelona College of Industrial Engineering, Universitat Politècnica de Catalunya, Barcelona 08037, Spain.
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Zaragoza 50018, Spain.
| | - Sergio Romero
- Biomedical Engineering Research Centre, Department of Automatic Control, Universitat Politècnica de Catalunya, Barcelona 08028, Spain.
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Zaragoza 50018, Spain.
| | - Miguel A Mañanas
- Biomedical Engineering Research Centre, Department of Automatic Control, Universitat Politècnica de Catalunya, Barcelona 08028, Spain.
- Barcelona College of Industrial Engineering, Universitat Politècnica de Catalunya, Barcelona 08037, Spain.
- CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Zaragoza 50018, Spain.
| | - Marta Alcalá
- Biomedical Engineering Research Centre, Department of Automatic Control, Universitat Politècnica de Catalunya, Barcelona 08028, Spain.
- Barcelona College of Industrial Engineering, Universitat Politècnica de Catalunya, Barcelona 08037, Spain.
| | - Rosa M Antonijoan
- Drug Research Centre, Hospital de la Santa Creu i Sant Pau, Barcelona 08026, Spain.
- Department of Pharmacology and Therapeutics, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain.
- CIBER de Salud Mental (CIBERSAM), Madrid 28029, Spain.
| | - Sandra Giménez
- Drug Research Centre, Hospital de la Santa Creu i Sant Pau, Barcelona 08026, Spain.
- Department of Pharmacology and Therapeutics, Universitat Autònoma de Barcelona, Bellaterra 08193, Spain.
- CIBER de Salud Mental (CIBERSAM), Madrid 28029, Spain.
- Sleep Unit, Respiratory Department, Hospital de la Santa Creu i Sant Pau, Barcelona 08028, Spain.
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69
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Abstract
Changes in brain activity accompanying shifts in vigilance and arousal can interfere with the study of other intrinsic and task-evoked characteristics of brain function. However, the difficulty of tracking and modeling the arousal state during functional MRI (fMRI) typically precludes the assessment of arousal-dependent influences on fMRI signals. Here we combine fMRI, electrophysiology, and the monitoring of eyelid behavior to demonstrate an approach for tracking continuous variations in arousal level from fMRI data. We first characterize the spatial distribution of fMRI signal fluctuations that track a measure of behavioral arousal; taking this pattern as a template, and using the local field potential as a simultaneous and independent measure of cortical activity, we observe that the time-varying expression level of this template in fMRI data provides a close approximation of electrophysiological arousal. We discuss the potential benefit of these findings for increasing the sensitivity of fMRI as a cognitive and clinical biomarker.
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70
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Leuthardt EC, Allen M, Kamran M, Hawasli AH, Snyder AZ, Hacker CD, Mitchell TJ, Shimony JS. Resting-State Blood Oxygen Level-Dependent Functional MRI: A Paradigm Shift in Preoperative Brain Mapping. Stereotact Funct Neurosurg 2016; 93:427-39. [PMID: 26784290 DOI: 10.1159/000442424] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Accepted: 11/12/2015] [Indexed: 11/19/2022]
Abstract
Currently, functional magnetic resonance imaging (fMRI) facilitates a preoperative awareness of an association of an eloquent region with a tumor. This information gives the neurosurgeon helpful information that can aid in creating a surgical strategy. Typically, task-based fMRI has been employed to preoperatively localize speech and motor function. Task-based fMRI depends on the patient's ability to comply with the task paradigm, which often is impaired in the setting of a brain tumor. This problem is overcome by using resting-state fMRI (rs-fMRI) to localize function. rs-fMRI measures spontaneous fluctuations in the blood oxygen level-dependent (BOLD) signal, representing the brain's functional organization. In a neurosurgical context, it allows noninvasive simultaneous assessment of multiple large-scale distributed networks. Compared with task-related fMRI, rs-fMRI provides more comprehensive information on the functional architecture of the brain and is applicable in settings where task-related fMRI may provide inadequate information or could not be performed. Taken together, rs-fMRI substantially expands the preoperative mapping capability in efficiency, effectiveness, and scope. In this article, a brief introduction into rs-fMRI processing methods is followed by a detailed discussion on the role rs-fMRI plays in presurgical planning.
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71
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Abstract
UNLABELLED Although the functions of sleep remain to be fully elucidated, it is clear that there are far-reaching effects of its disruption, whether by curtailment for a single night, by a few hours each night over a long period, or by disruption in sleep continuity. Epidemiological and experimental studies of these different forms of sleep disruption show deranged physiology from subcellular levels to complex affective behavior. In keeping with the multifaceted influence of sleep on health and well-being, we illustrate how the duration of sleep, its timing, and continuity can affect cellular ultrastructure, gene expression, metabolic and hormone regulation, mood, and vigilance. Recent brain imaging studies provide some clues on mechanisms underlying the most common cause of disrupted sleep (insomnia). These insights should ultimately result in adequate interventions to prevent and treat sleep disruption because of their high relevance to our most prevalent health problems. SIGNIFICANCE STATEMENT Disruption of the duration, timing, and continuity of sleep affects cellular ultrastructure, gene expression, appetite regulation, hormone production, vigilance, and reward functions.
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72
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Khalsa S, Mayhew SD, Przezdzik I, Wilson R, Hale J, Goldstone A, Bagary M, Bagshaw AP. Variability in Cumulative Habitual Sleep Duration Predicts Waking Functional Connectivity. Sleep 2016; 39:87-95. [PMID: 26414900 PMCID: PMC4678343 DOI: 10.5665/sleep.5324] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Accepted: 08/06/2015] [Indexed: 01/03/2023] Open
Abstract
STUDY OBJECTIVES We examined whether interindividual differences in habitual sleep patterns, quantified as the cumulative habitual total sleep time (cTST) over a 2-w period, were reflected in waking measurements of intranetwork and internetwork functional connectivity (FC) between major nodes of three intrinsically connected networks (ICNs): default mode network (DMN), salience network (SN), and central executive network (CEN). METHODS Resting state functional magnetic resonance imaging (fMRI) study using seed-based FC analysis combined with 14-d wrist actigraphy, sleep diaries, and subjective questionnaires (N = 33 healthy adults, mean age 34.3, standard deviation ± 11.6 y). Data were statistically analyzed using multiple linear regression. Fourteen consecutive days of wrist actigraphy in participant's home environment and fMRI scanning on day 14 at the Birmingham University Imaging Centre. Seed-based FC analysis on ICNs from resting-state fMRI data and multiple linear regression analysis performed for each ICN seed and target. cTST was used to predict FC (controlling for age). RESULTS cTST was specific predictor of intranetwork FC when the mesial prefrontal cortex (MPFC) region of the DMN was used as a seed for FC, with a positive correlation between FC and cTST observed. No significant relationship between FC and cTST was seen for any pair of nodes not including the MPFC. Internetwork FC between the DMN (MPFC) and SN (right anterior insula) was also predicted by cTST, with a negative correlation observed between FC and cTST. CONCLUSIONS This study improves understanding of the relationship between intranetwork and internetwork functional connectivity of intrinsically connected networks (ICNs) in relation to habitual sleep quality and duration. The cumulative amount of sleep that participants achieved over a 14-d period was significantly predictive of intranetwork and inter-network functional connectivity of ICNs, an observation that may underlie the link between sleep status and cognitive performance.
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Affiliation(s)
- Sakh Khalsa
- Birmingham University Imaging Centre (BUIC), School of Psychology, University of Birmingham, Birmingham, UK
- Department of Neuropsychiatry, The Barberry National Centre for Mental Health, Birmingham, UK
| | - Stephen D. Mayhew
- Birmingham University Imaging Centre (BUIC), School of Psychology, University of Birmingham, Birmingham, UK
| | - Izabela Przezdzik
- Birmingham University Imaging Centre (BUIC), School of Psychology, University of Birmingham, Birmingham, UK
| | - Rebecca Wilson
- Birmingham University Imaging Centre (BUIC), School of Psychology, University of Birmingham, Birmingham, UK
| | - Joanne Hale
- Birmingham University Imaging Centre (BUIC), School of Psychology, University of Birmingham, Birmingham, UK
| | - Aimee Goldstone
- Birmingham University Imaging Centre (BUIC), School of Psychology, University of Birmingham, Birmingham, UK
| | - Manny Bagary
- Department of Neuropsychiatry, The Barberry National Centre for Mental Health, Birmingham, UK
| | - Andrew P. Bagshaw
- Birmingham University Imaging Centre (BUIC), School of Psychology, University of Birmingham, Birmingham, UK
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73
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Wang L, Chen Y, Yao Y, Pan Y, Sun Y. Sleep deprivation disturbed regional brain activity in healthy subjects: evidence from a functional magnetic resonance-imaging study. Neuropsychiatr Dis Treat 2016; 12:801-7. [PMID: 27110113 PMCID: PMC4835129 DOI: 10.2147/ndt.s99644] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
OBJECTIVE The aim of this study was to use amplitude of low-frequency fluctuation (ALFF) to explore regional brain activities in healthy subjects after sleep deprivation (SD). MATERIALS AND METHODS A total of 16 healthy subjects (eight females, eight males) underwent the session twice: once was after normal sleep (NS), and the other was after SD. ALFF was used to assess local brain features. The mean ALFF-signal values of the different brain areas were evaluated to investigate relationships with clinical features and were analyzed with a receiver-operating characteristic curve. RESULTS Compared with NS subjects, SD subjects showed a lower response-accuracy rate, longer response time, and higher lapse rate. Compared with NS subjects, SD subjects showed higher ALFF area in the right cuneus and lower ALFF area in the right lentiform nucleus, right claustrum, left dorsolateral prefrontal cortex, and left inferior parietal cortex. ALFF differences in regional brain areas showed high sensitivity and specificity. In the SD group, mean ALFF of the right claustrum showed a significant positive correlation with accuracy rate (r=0.687, P=0.013) and a negative correlation with lapse rate (r=-0.706, P=0.01). Mean ALFF of the dorsolateral prefrontal cortex showed a significant positive correlation with response time (r=0.675, P=0.016). CONCLUSION SD disturbed the regional brain activity of the default-mode network, its anticorrelated "task-positive" network, and the advanced cognitive function brain areas.
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Affiliation(s)
- Li Wang
- Department of Neurology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, People's Republic of China
| | - Yin Chen
- Department of Neurology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, People's Republic of China
| | - Ying Yao
- Department of Neurology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, People's Republic of China
| | - Yu Pan
- Department of Neurology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, People's Republic of China
| | - Yi Sun
- Department of Neurology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, People's Republic of China
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74
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Suh S, Kim H, Dang-Vu TT, Joo E, Shin C. Cortical Thinning and Altered Cortico-Cortical Structural Covariance of the Default Mode Network in Patients with Persistent Insomnia Symptoms. Sleep 2016; 39:161-71. [PMID: 26414892 DOI: 10.5665/sleep.5340] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Accepted: 07/18/2015] [Indexed: 01/11/2023] Open
Abstract
STUDY OBJECTIVES Recent studies have suggested that structural abnormalities in insomnia may be linked with alterations in the default-mode network (DMN). This study compared cortical thickness and structural connectivity linked to the DMN in patients with persistent insomnia (PI) and good sleepers (GS). METHODS The current study used a clinical subsample from the longitudinal community-based Korean Genome and Epidemiology Study (KoGES). Cortical thickness and structural connectivity linked to the DMN in patients with persistent insomnia symptoms (PIS; n = 57) were compared to good sleepers (GS; n = 40). All participants underwent MRI acquisition. Based on literature review, we selected cortical regions corresponding to the DMN. A seed-based structural covariance analysis measured cortical thickness correlation between each seed region of the DMN and other cortical areas. Association of cortical thickness and covariance with sleep quality and neuropsychological assessments were further assessed. RESULTS Compared to GS, cortical thinning was found in PIS in the anterior cingulate cortex, precentral cortex, and lateral prefrontal cortex. Decreased structural connectivity between anterior and posterior regions of the DMN was observed in the PIS group. Decreased structural covariance within the DMN was associated with higher PSQI scores. Cortical thinning in the lateral frontal lobe was related to poor performance in executive function in PIS. CONCLUSION Disrupted structural covariance network in PIS might reflect malfunctioning of antero-posterior disconnection of the DMN during the wake to sleep transition that is commonly found during normal sleep. The observed structural network alteration may further implicate commonly observed sustained sleep difficulties and cognitive impairment in insomnia.
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Affiliation(s)
- Sooyeon Suh
- Sungshin Women's University, Department of Psychology, Seoul, Korea.,Stanford University, Department of Psychiatry, Palo Alto, CA
| | - Hosung Kim
- University of California San Francisco, Department of Radiology and Biomedical Imaging, San Francisco, CA
| | - Thien Thanh Dang-Vu
- Center for Studies in Behavioral Neurobiology, PERFORM Center & Department of Exercise Science, Concordia University, Montreal, Canada.,Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal & Department of Neurosciences, University of Montreal, Montreal, Canada
| | - Eunyeon Joo
- Samsung Medical Center, Department of Neurology, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Chol Shin
- Korea University Ansan Hospital, Institute of Human Genomic Study, Seoul, Korea.,Korea University Ansan Hospital, Department of Internal Medicine, Seoul, Korea
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75
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Altmann A, Schröter MS, Spoormaker VI, Kiem SA, Jordan D, Ilg R, Bullmore ET, Greicius MD, Czisch M, Sämann PG. Validation of non-REM sleep stage decoding from resting state fMRI using linear support vector machines. Neuroimage 2015; 125:544-555. [PMID: 26596551 DOI: 10.1016/j.neuroimage.2015.09.072] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Revised: 08/27/2015] [Accepted: 09/28/2015] [Indexed: 12/17/2022] Open
Abstract
A growing body of literature suggests that changes in consciousness are reflected in specific connectivity patterns of the brain as obtained from resting state fMRI (rs-fMRI). As simultaneous electroencephalography (EEG) is often unavailable, decoding of potentially confounding sleep patterns from rs-fMRI itself might be useful and improve data interpretation. Linear support vector machine classifiers were trained on combined rs-fMRI/EEG recordings from 25 subjects to separate wakefulness (S0) from non-rapid eye movement (NREM) sleep stages 1 (S1), 2 (S2), slow wave sleep (SW) and all three sleep stages combined (SX). Classifier performance was quantified by a leave-one-subject-out cross-validation (LOSO-CV) and on an independent validation dataset comprising 19 subjects. Results demonstrated excellent performance with areas under the receiver operating characteristics curve (AUCs) close to 1.0 for the discrimination of sleep from wakefulness (S0|SX), S0|S1, S0|S2 and S0|SW, and good to excellent performance for the classification between sleep stages (S1|S2:~0.9; S1|SW:~1.0; S2|SW:~0.8). Application windows of fMRI data from about 70 s were found as minimum to provide reliable classifications. Discrimination patterns pointed to subcortical-cortical connectivity and within-occipital lobe reorganization of connectivity as strongest carriers of discriminative information. In conclusion, we report that functional connectivity analysis allows valid classification of NREM sleep stages.
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Affiliation(s)
- A Altmann
- Max Planck Institute of Psychiatry, Department of Translational Research in Psychiatry, Neuroimaging, Munich, Germany; Stanford Center for Memory Disorders, Department of Neurology and Neurological Sciences, Stanford University, Stanford, CA, USA.
| | - M S Schröter
- Max Planck Institute of Psychiatry, Department of Translational Research in Psychiatry, Neuroimaging, Munich, Germany; Behavioural and Clinical Neuroscience Institute, Department of Psychiatry, University of Cambridge, Cambridge, United Kingdom
| | - V I Spoormaker
- Max Planck Institute of Psychiatry, Department of Translational Research in Psychiatry, Neuroimaging, Munich, Germany
| | - S A Kiem
- Max Planck Institute of Psychiatry, Department of Translational Research in Psychiatry, Neuroimaging, Munich, Germany
| | - D Jordan
- Department of Anesthesiology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - R Ilg
- Department of Neurology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany; Asklepios Stadtklinik, Bad Tölz, Germany
| | - E T Bullmore
- Behavioural and Clinical Neuroscience Institute, Department of Psychiatry, University of Cambridge, Cambridge, United Kingdom
| | - M D Greicius
- Stanford Center for Memory Disorders, Department of Neurology and Neurological Sciences, Stanford University, Stanford, CA, USA
| | - M Czisch
- Max Planck Institute of Psychiatry, Department of Translational Research in Psychiatry, Neuroimaging, Munich, Germany
| | - P G Sämann
- Max Planck Institute of Psychiatry, Department of Translational Research in Psychiatry, Neuroimaging, Munich, Germany
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76
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Hale JR, White TP, Mayhew SD, Wilson RS, Rollings DT, Khalsa S, Arvanitis TN, Bagshaw AP. Altered thalamocortical and intra-thalamic functional connectivity during light sleep compared with wake. Neuroimage 2015; 125:657-667. [PMID: 26499809 DOI: 10.1016/j.neuroimage.2015.10.041] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Revised: 09/16/2015] [Accepted: 10/16/2015] [Indexed: 01/14/2023] Open
Abstract
The transition from wakefulness into sleep is accompanied by modified activity in the brain's thalamocortical network. Sleep-related decreases in thalamocortical functional connectivity (FC) have previously been reported, but the extent to which these changes differ between thalamocortical pathways, and patterns of intra-thalamic FC during sleep remain untested. To non-invasively investigate thalamocortical and intra-thalamic FC as a function of sleep stage we recorded simultaneous EEG-fMRI data in 13 healthy participants during their descent into light sleep. Visual scoring of EEG data permitted sleep staging. We derived a functional thalamic parcellation during wakefulness by computing seed-based FC, measured between thalamic voxels and a set of pre-defined cortical regions. Sleep differentially affected FC between these distinct thalamic subdivisions and their associated cortical projections, with significant increases in FC during sleep restricted to sensorimotor connections. In contrast, intra-thalamic FC, both within and between functional thalamic subdivisions, showed significant increases with advancement into sleep. This work demonstrates the complexity and state-specific nature of functional thalamic relationships--both with the cortex and internally--over the sleep/wake cycle, and further highlights the importance of a thalamocortical focus in the study of sleep mechanisms.
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Affiliation(s)
- Joanne R Hale
- School of Psychology, University of Birmingham, Birmingham, UK.
| | - Thomas P White
- School of Psychology, University of Birmingham, Birmingham, UK
| | | | | | - David T Rollings
- School of Psychology, University of Birmingham, Birmingham, UK; Department of Neurophysiology, Queen Elizabeth Hospital, Birmingham, UK
| | - Sakhvinder Khalsa
- School of Psychology, University of Birmingham, Birmingham, UK; Department of Neuropsychiatry, The Barberry National Centre for Mental Health, Birmingham, UK
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77
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Lei Y, Shao Y, Wang L, Ye E, Jin X, Zou F, Zhai T, Li W, Yang Z. Altered superficial amygdala-cortical functional link in resting state after 36 hours of total sleep deprivation. J Neurosci Res 2015; 93:1795-803. [DOI: 10.1002/jnr.23601] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2014] [Revised: 04/08/2015] [Accepted: 04/23/2015] [Indexed: 12/30/2022]
Affiliation(s)
- Yu Lei
- Cognitive and Mental Health Research Center; Beijing Institute of Basic Medical Sciences; Beijing People's Republic of China
| | - Yongcong Shao
- Cognitive and Mental Health Research Center; Beijing Institute of Basic Medical Sciences; Beijing People's Republic of China
| | - Lubin Wang
- Cognitive and Mental Health Research Center; Beijing Institute of Basic Medical Sciences; Beijing People's Republic of China
| | - Enmao Ye
- Cognitive and Mental Health Research Center; Beijing Institute of Basic Medical Sciences; Beijing People's Republic of China
| | - Xiao Jin
- Cognitive and Mental Health Research Center; Beijing Institute of Basic Medical Sciences; Beijing People's Republic of China
| | - Feng Zou
- Cognitive and Mental Health Research Center; Beijing Institute of Basic Medical Sciences; Beijing People's Republic of China
| | - Tianye Zhai
- Cognitive and Mental Health Research Center; Beijing Institute of Basic Medical Sciences; Beijing People's Republic of China
| | - Wuju Li
- Beijing Institute of Basic Medical Sciences; Beijing People's Republic of China
| | - Zheng Yang
- Cognitive and Mental Health Research Center; Beijing Institute of Basic Medical Sciences; Beijing People's Republic of China
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78
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Zhang Q, Qin W, He X, Li Q, Chen B, Zhang Y, Yu C. Functional disconnection of the right anterior insula in obstructive sleep apnea. Sleep Med 2015; 16:1062-70. [DOI: 10.1016/j.sleep.2015.04.018] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Revised: 03/06/2015] [Accepted: 04/10/2015] [Indexed: 11/16/2022]
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79
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Ong JL, Kong D, Chia TT, Tandi J, Thomas Yeo B, Chee MW. Co-activated yet disconnected—Neural correlates of eye closures when trying to stay awake. Neuroimage 2015; 118:553-62. [DOI: 10.1016/j.neuroimage.2015.03.085] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Revised: 03/24/2015] [Accepted: 03/24/2015] [Indexed: 12/25/2022] Open
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80
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Lei Y, Shao Y, Wang L, Zhai T, Zou F, Ye E, Jin X, Li W, Qi J, Yang Z. Large-Scale Brain Network Coupling Predicts Total Sleep Deprivation Effects on Cognitive Capacity. PLoS One 2015. [PMID: 26218521 PMCID: PMC4517902 DOI: 10.1371/journal.pone.0133959] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Interactions between large-scale brain networks have received most attention in the study of cognitive dysfunction of human brain. In this paper, we aimed to test the hypothesis that the coupling strength of large-scale brain networks will reflect the pressure for sleep and will predict cognitive performance, referred to as sleep pressure index (SPI). Fourteen healthy subjects underwent this within-subject functional magnetic resonance imaging (fMRI) study during rested wakefulness (RW) and after 36 h of total sleep deprivation (TSD). Self-reported scores of sleepiness were higher for TSD than for RW. A subsequent working memory (WM) task showed that WM performance was lower after 36 h of TSD. Moreover, SPI was developed based on the coupling strength of salience network (SN) and default mode network (DMN). Significant increase of SPI was observed after 36 h of TSD, suggesting stronger pressure for sleep. In addition, SPI was significantly correlated with both the visual analogue scale score of sleepiness and the WM performance. These results showed that alterations in SN-DMN coupling might be critical in cognitive alterations that underlie the lapse after TSD. Further studies may validate the SPI as a potential clinical biomarker to assess the impact of sleep deprivation.
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Affiliation(s)
- Yu Lei
- Beijing Institute of Basic Medical Sciences, Beijing, PR China
- Cognitive and Mental Health Research Center, Beijing, PR China
| | - Yongcong Shao
- Beijing Institute of Basic Medical Sciences, Beijing, PR China
- Cognitive and Mental Health Research Center, Beijing, PR China
| | - Lubin Wang
- Beijing Institute of Basic Medical Sciences, Beijing, PR China
- Cognitive and Mental Health Research Center, Beijing, PR China
| | - Tianye Zhai
- Beijing Institute of Basic Medical Sciences, Beijing, PR China
- Cognitive and Mental Health Research Center, Beijing, PR China
| | - Feng Zou
- Beijing Institute of Basic Medical Sciences, Beijing, PR China
- Cognitive and Mental Health Research Center, Beijing, PR China
| | - Enmao Ye
- Beijing Institute of Basic Medical Sciences, Beijing, PR China
- Cognitive and Mental Health Research Center, Beijing, PR China
| | - Xiao Jin
- Beijing Institute of Basic Medical Sciences, Beijing, PR China
- Cognitive and Mental Health Research Center, Beijing, PR China
| | - Wuju Li
- Beijing Institute of Basic Medical Sciences, Beijing, PR China
- * E-mail: (WL); (JQ); (ZY)
| | - Jianlin Qi
- Department of Clinical Psychology, Air-Force General Hospital, Beijing, PR China
- * E-mail: (WL); (JQ); (ZY)
| | - Zheng Yang
- Beijing Institute of Basic Medical Sciences, Beijing, PR China
- Cognitive and Mental Health Research Center, Beijing, PR China
- * E-mail: (WL); (JQ); (ZY)
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81
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Elvemo NA, Landrø NI, Borchgrevink PC, Håberg AK. A particular effect of sleep, but not pain or depression, on the blood-oxygen-level dependent response during working memory tasks in patients with chronic pain. J Pain Res 2015; 8:335-46. [PMID: 26185465 PMCID: PMC4500611 DOI: 10.2147/jpr.s83486] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background Patients with chronic pain (CP) are often reported to have deficits in working memory. Pain impairs working memory, but so do depression and sleep problems, which are also common in CP. Depression has been linked to changes in brain activity in CP during working memory tasks, but the effect of sleep problems on working memory performance and brain activity remains to be investigated. Methods Fifteen CP patients and 17 age-, sex-, and education-matched controls underwent blood-oxygen-level dependent (BOLD) functional magnetic resonance imaging at 3T while performing block design 0-back, 2-back, and paced visual serial addition test paradigms. Subjects also reported their level of pain (Brief Pain Inventory), depression (Beck Depression Inventory II), and sleep problems (Pittsburgh Sleep Quality Index) and were tested outside the scanner with neuropsychological tests of working memory. Results The CP group reported significantly higher levels of pain, depression, and sleep problems. No significant performance difference was found on the neuropsychological tests in or outside the scanner between the two groups. There were no correlations between level of pain, depression, and sleep problems or between these and the neuropsychological test scores. CP patients exhibited significantly less brain activation and deactivation than controls in parietal and frontal lobes, which are the brain areas that normally show activation and deactivation during working memory tasks. Sleep problems independently and significantly modulated the BOLD response to the complex working memory tasks and were associated with decreased brain activation in task-positive regions and decreased deactivation in the default mode network in the CP group compared to the control group. The pain and depression scores covaried with working memory activation. Discussion Sleep problems in CP patients had a significant impact on the BOLD response during working memory tasks, independent of pain level and depression, even when performance was shown not to be significantly affected.
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Affiliation(s)
- Nicolas A Elvemo
- Department of Neuroscience, Medical Faculty, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
| | - Nils I Landrø
- Clinical Neuroscience Research Group, Department of Psychology, University of Oslo, Oslo, Norway ; Department of Circulation and Medical Imaging, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
| | - Petter C Borchgrevink
- Department of Circulation and Medical Imaging, Norwegian University of Science and Technology (NTNU), Trondheim, Norway ; National Norwegian Advisory Unit for Complex Disorders, St Olav University Hospital, Trondheim, Norway
| | - Asta K Håberg
- Department of Neuroscience, Medical Faculty, Norwegian University of Science and Technology (NTNU), Trondheim, Norway ; Department of Medical Imaging, St Olav University Hospital, Trondheim, Norway
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Elvsåshagen T, Norbom LB, Pedersen PØ, Quraishi SH, Bjørnerud A, Malt UF, Groote IR, Westlye LT. Widespread changes in white matter microstructure after a day of waking and sleep deprivation. PLoS One 2015; 10:e0127351. [PMID: 26020651 PMCID: PMC4447359 DOI: 10.1371/journal.pone.0127351] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2014] [Accepted: 04/14/2015] [Indexed: 12/12/2022] Open
Abstract
Background Elucidating the neurobiological effects of sleep and waking remains an important goal of the neurosciences. Recently, animal studies indicated that sleep is important for cell membrane and myelin maintenance in the brain and that these structures are particularly susceptible to insufficient sleep. Here, we tested the hypothesis that a day of waking and sleep deprivation would be associated with changes in diffusion tensor imaging (DTI) indices of white matter microstructure sensitive to axonal membrane and myelin alterations. Methods Twenty-one healthy adult males underwent DTI in the morning [7:30AM; time point (TP)1], after 14 hours of waking (TP2), and then after another 9 hours of waking (TP3). Whole brain voxel-wise analysis was performed with tract based spatial statistics. Results A day of waking was associated with widespread increases in white matter fractional anisotropy, which were mainly driven by radial diffusivity reductions, and sleep deprivation was associated with widespread fractional anisotropy decreases, which were mainly explained by reductions in axial diffusivity. In addition, larger decreases in axial diffusivity after sleep deprivation were associated with greater sleepiness. All DTI changes remained significant after adjusting for hydration measures. Conclusions This is the first DTI study of sleep deprivation in humans. Although previous studies have observed localized changes in DTI indices of cerebral microstructure over the course of a few hours, further studies are needed to confirm widespread DTI changes within hours of waking and to clarify whether such changes in white matter microstructure serve as neurobiological substrates of sleepiness.
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Affiliation(s)
- Torbjørn Elvsåshagen
- Department of Psychosomatic Medicine, Institution of Oslo University Hospital, Oslo, Norway
- Department of Neurology, Institution of Oslo University Hospital, Oslo, Norway
- Norwegian Centre for Mental Disorders Research (NORMENT)/KG Jebsen Centre for Psychosis Research, Institution of Oslo University Hospital, Oslo, Norway
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway
- * E-mail:
| | - Linn B. Norbom
- Department of Psychology, University of Oslo, Oslo, Norway
| | - Per Ø. Pedersen
- Department of Psychosomatic Medicine, Institution of Oslo University Hospital, Oslo, Norway
| | - Sophia H. Quraishi
- Barnard College, Columbia University, New York, NY, United States of America
| | - Atle Bjørnerud
- The Intervention Centre, Institution of Oslo University Hospital, Oslo, Norway
- Department of Physics (AB), University of Oslo, Oslo, Norway
| | - Ulrik F. Malt
- Department of Psychosomatic Medicine, Institution of Oslo University Hospital, Oslo, Norway
- Department of Research and Education, Institution of Oslo University Hospital, Oslo, Norway
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Inge R. Groote
- The Intervention Centre, Institution of Oslo University Hospital, Oslo, Norway
- Department of Psychology, University of Oslo, Oslo, Norway
| | - Lars T. Westlye
- Norwegian Centre for Mental Disorders Research (NORMENT)/KG Jebsen Centre for Psychosis Research, Institution of Oslo University Hospital, Oslo, Norway
- Department of Psychology, University of Oslo, Oslo, Norway
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83
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Yeo BT, Tandi J, Chee MW. Functional connectivity during rested wakefulness predicts vulnerability to sleep deprivation. Neuroimage 2015; 111:147-58. [DOI: 10.1016/j.neuroimage.2015.02.018] [Citation(s) in RCA: 145] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Revised: 02/07/2015] [Accepted: 02/09/2015] [Indexed: 12/20/2022] Open
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84
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Gao L, Bai L, Zhang Y, Dai XJ, Netra R, Min Y, Zhou F, Niu C, Dun W, Gong H, Zhang M. Frequency-dependent changes of local resting oscillations in sleep-deprived brain. PLoS One 2015; 10:e0120323. [PMID: 25798918 PMCID: PMC4370559 DOI: 10.1371/journal.pone.0120323] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Accepted: 02/05/2015] [Indexed: 11/18/2022] Open
Abstract
Sleep deprivation (SD) adversely affects brain function and is accompanied by frequency dependent changes in EEG. Recent studies have suggested that BOLD fluctuations pertain to a spatiotemporal organization with different frequencies. The present study aimed to investigate the frequency-dependent SD-related brain oscillatory activity by using the amplitude of low-frequency fluctuation (ALFF) analysis. The ALFF changes were measured across different frequencies (Slow-4: 0.027–0.073 Hz; Slow-5: 0.01–0.027 Hz; and Typical band: 0.01–0.08 Hz) in 24 h SD as compared to rested wakeful during resting-state fMRI. Sixteen volunteers underwent two fMRI sessions, once during rested wakefulness and once after 24 h of SD. SD showed prominently decreased ALFF in the right inferior parietal lobule (IPL), bilateral orbitofrontal cortex (OFC) and dorsolateral prefrontal cortex (DLPFC), while increased ALFF in the visual cortex, left sensorimotor cortex and fusiform gyrus. Across the Slow-4 and Slow-5, results differed significantly in the OFC, DLPFC, thalamus and caudate in comparison to typical frequency band; and Slow-4 showed greater differences. In addition, negative correlations of behavior performance and ALFF patterns were found mainly in the right IPL across the typical frequency band. These observations provided novel insights about the physiological responses of SD, identified how it disturbs the brain rhythms, and linked SD with frequency-dependent alterations in amplitude patterns.
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Affiliation(s)
- Lei Gao
- Department of Medical Imaging, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
- Department of Radiology, the First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, China
| | - Lijun Bai
- The Key Laboratory of Biomedical Information Engineering, Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi’an Jiaotong University, Xi’an, China
| | - Yuchen Zhang
- Zonglian Experimental Class, Xi’an Jiaotong University, Xi’an, China
| | - Xi-jian Dai
- Department of Radiology, the First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, China
| | - Rana Netra
- Department of Medical Imaging, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Youjiang Min
- Acupuncture & Rehabilitation Department, Affiliated Hospital of Jiangxi University of Traditional Chinese Medicine, Nanchang, Jiangxi Province, China
| | - Fuqing Zhou
- Department of Radiology, the First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, China
| | - Chen Niu
- Department of Medical Imaging, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Wanghuan Dun
- Department of Medical Imaging, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Honghan Gong
- Department of Radiology, the First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, China
- * E-mail: (MZ); (HG)
| | - Ming Zhang
- Department of Medical Imaging, the First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
- * E-mail: (MZ); (HG)
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Wilson RS, Mayhew SD, Rollings DT, Goldstone A, Przezdzik I, Arvanitis TN, Bagshaw AP. Influence of epoch length on measurement of dynamic functional connectivity in wakefulness and behavioural validation in sleep. Neuroimage 2015; 112:169-179. [PMID: 25765256 DOI: 10.1016/j.neuroimage.2015.02.061] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2015] [Accepted: 02/28/2015] [Indexed: 12/20/2022] Open
Abstract
Conventional functional connectivity (FC) analysis of fMRI data derives a single measurement from the entire scan, generally several minutes in duration, which neglects the brain's dynamic behaviour and potentially loses important temporal information. Short-interval dynamic FC is an attractive proposition if methodological issues can be resolved and the approach validated. This was addressed in two ways; firstly we assessed FC of the posterior cingulate cortex (PCC) node of the default mode network (DMN) using differing temporal intervals (8s to 5min) in the waking-resting state. We found that 30-second intervals and longer produce spatially similar correlation topography compared to 15-minute static FC measurements, while providing increased temporal information about changes in FC that were consistent across interval lengths. Secondly, we used NREM sleep as a behavioural validation for the use of 30-second temporal intervals due to the known fMRI FC changes with sleep stage that have been observed in previous studies using intervals of several minutes. We found significant decreases in DMN FC with sleep depth which were most pronounced during stage N2 and N3. Additionally, both the proportion of time with strong PCC-DMN connectivity and the variability in dynamic FC decreased with sleep. We therefore show that dynamic FC with epochs as short as tens of seconds is a viable method for characterising intrinsic brain activity.
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Affiliation(s)
- Rebecca S Wilson
- Birmingham University Imaging Centre School of Psychology, University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom
| | - Stephen D Mayhew
- Birmingham University Imaging Centre School of Psychology, University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom
| | - David T Rollings
- Birmingham University Imaging Centre School of Psychology, University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom; Department of Neurophysiology, Queen Elizabeth Hospital, Birmingham, B15 2TH, United Kingdom
| | - Aimee Goldstone
- Birmingham University Imaging Centre School of Psychology, University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom
| | - Izabela Przezdzik
- Birmingham University Imaging Centre School of Psychology, University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom
| | - Theodoros N Arvanitis
- Warwick Manufacturing Group, University of Warwick, Coventry, CV4 7AL, United Kingdom
| | - Andrew P Bagshaw
- Birmingham University Imaging Centre School of Psychology, University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom.
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Nie X, Shao Y, Liu SY, Li HJ, Wan AL, Nie S, Peng DC, Dai XJ. Functional connectivity of paired default mode network subregions in primary insomnia. Neuropsychiatr Dis Treat 2015; 11:3085-93. [PMID: 26719693 PMCID: PMC4689284 DOI: 10.2147/ndt.s95224] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
OBJECTIVE The aim of this study is to explore the resting-state functional connectivity (FC) differences between the paired default mode network (DMN) subregions in patients with primary insomnia (PIs). METHODS Forty-two PIs and forty-two age- and sex-matched good sleepers (GSs) were recruited. All subjects underwent the resting-state functional magnetic resonance imaging scans. The seed-based region-to-region FC method was used to evaluate the abnormal connectivity within the DMN subregions between the PIs and the GSs. Pearson correlation analysis was used to investigate the relationships between the abnormal FC strength within the paired DMN subregions and the clinical features in PIs. RESULTS Compared with the GSs, the PIs showed higher Pittsburgh Sleep Quality Index score, Hamilton Anxiety Rating Scale score, Hamilton Depression Rating Scale score, Self-Rating Depression Scale score, Self Rating Anxiety Scale score, Self-Rating Scale of Sleep score, and Profile of Mood States score (P<0.001). Compared with the GSs, the PIs showed significant decreased region-to-region FC between the medial prefrontal cortex and the right medial temporal lobe (t=-2.275, P=0.026), and between the left medial temporal lobe and the left inferior parietal cortices (t=-3.32, P=0.001). The abnormal FC strengths between the DMN subregions did not correlate with the clinical features. CONCLUSION PIs showed disrupted FC within the DMN subregions.
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Affiliation(s)
- Xiao Nie
- Department of Radiology, The First Affiliated Hospital of Nanchang University, Nangchang, Jiangxi, People's Republic of China
| | - Yi Shao
- Department of Ophthalmology,The First Affiliated Hospital of Nanchang University, Nangchang, Jiangxi, People's Republic of China
| | - Si-Yu Liu
- Medical College of Nanchang University, Nangchang, Jiangxi, People's Republic of China
| | - Hai-Jun Li
- Department of Radiology, The First Affiliated Hospital of Nanchang University, Nangchang, Jiangxi, People's Republic of China
| | - Ai-Lan Wan
- Department of Psychosomatic Medicine, The First Affiliated Hospital of Nanchang University, Nangchang, Jiangxi, People's Republic of China
| | - Si Nie
- Department of Radiology, The First Affiliated Hospital of Nanchang University, Nangchang, Jiangxi, People's Republic of China
| | - De-Chang Peng
- Department of Radiology, The First Affiliated Hospital of Nanchang University, Nangchang, Jiangxi, People's Republic of China
| | - Xi-Jian Dai
- Department of Radiology, The First Affiliated Hospital of Nanchang University, Nangchang, Jiangxi, People's Republic of China ; Brain Cognition and Brain Disease Institute, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, People's Republic of China
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87
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Default-mode network activity and its role in comprehension and management of psychophysiological insomnia: A new perspective. NEW IDEAS IN PSYCHOLOGY 2015. [DOI: 10.1016/j.newideapsych.2014.08.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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88
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Dai XJ, Liu CL, Zhou RL, Gong HH, Wu B, Gao L, Wang YXJ. Long-term total sleep deprivation decreases the default spontaneous activity and connectivity pattern in healthy male subjects: a resting-state fMRI study. Neuropsychiatr Dis Treat 2015; 11:761-72. [PMID: 25834451 PMCID: PMC4372006 DOI: 10.2147/ndt.s78335] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
OBJECTIVE The aim of this study is to use resting-state functional connectivity (rsFC) and amplitude of low-frequency fluctuation (ALFF) methods to explore intrinsic default-mode network (DMN) impairment after sleep deprivation (SD) and its relationships with clinical features. METHODS Twelve healthy male subjects underwent resting-state functional magnetic resonance imaging twice: once following rested wakefulness (RW) and the other following 72 hours of total SD. Before the scans, all subjects underwent the attention network test (ANT). The independent component analysis (ICA), rsFC, and ALFF methods were used to examine intrinsic DMN impairment. Receiver operating characteristic (ROC) curve was used to distinguish SD status from RW status. RESULTS Compared with RW subjects, SD subjects showed a lower accuracy rate (RW =96.83%, SD =77.67%; P<0.001), a slower reaction time (RW =695.92 ms; SD =799.18 ms; P=0.003), a higher lapse rate (RW =0.69%, SD =19.29%; P<0.001), and a higher intraindividual coefficient of variability in reaction time (RW =0.26, SD =0.33; P=0.021). The ICA method showed that, compared with RW subjects, SD subjects had decreased rsFC in the right inferior parietal lobule (IPL, BA40) and in the left precuneus (PrC)/posterior cingulate cortex (PCC) (BA30, 31). The two different areas were selected as regions of interest (ROIs) for future rsFC analysis. Compared with the same in RW subjects, in SD subjects, the right IPL showed decreased rsFC with the left PrC (BA7) and increased rsFC with the left fusiform gyrus (BA37) and the left cluster of middle temporal gyrus and inferior temporal gyrus (BA37). However, the left PrC/PCC did not show any connectivity differences. Compared with RW subjects, SD subjects showed lower ALFF area in the left IPL (BA39, 40). The left IPL, as an ROI, showed decreased rsFC with the right cluster of IPL and superior temporal gyrus (BA39, 40). ROC curve analysis showed that the area under the curve (AUC) value of the left IPL was 0.75, with a cutoff point of 0.834 (mean ALFF signal value). Further diagnostic analysis exhibited that the AUC alone discriminated SD status from RW status, with 75% sensitivity and 91.7% specificity. CONCLUSION Long-term SD disturbed the spontaneous activity and connectivity pattern of DMN.
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Affiliation(s)
- Xi-Jian Dai
- Department of Radiology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, People's Republic of China ; Department of Imaging and Interventional Radiology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, People's Republic of China
| | - Chun-Lei Liu
- Beijing Key Lab of Applied Experimental Psychology, School of Psychology, and National Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing, People's Republic of China ; School of Education, Qufu Normal University, Qufu, Shandong, People's Republic of China
| | - Ren-Lai Zhou
- Beijing Key Lab of Applied Experimental Psychology, School of Psychology, and National Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing, People's Republic of China
| | - Hong-Han Gong
- Department of Radiology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, People's Republic of China
| | - Bin Wu
- National Key Laboratory of Human Factors Engineering, China Astronaut Research and Training Center, Beijing, People's Republic of China
| | - Lei Gao
- Department of Radiology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, People's Republic of China
| | - Yi-Xiang J Wang
- Department of Imaging and Interventional Radiology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR, People's Republic of China
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Shao Y, Lei Y, Wang L, Zhai T, Jin X, Ni W, Yang Y, Tan S, Wen B, Ye E, Yang Z. Altered resting-state amygdala functional connectivity after 36 hours of total sleep deprivation. PLoS One 2014; 9:e112222. [PMID: 25372882 PMCID: PMC4221616 DOI: 10.1371/journal.pone.0112222] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Accepted: 10/10/2014] [Indexed: 11/18/2022] Open
Abstract
Objectives Recent neuroimaging studies have identified a potentially critical role of the amygdala in disrupted emotion neurocircuitry in individuals after total sleep deprivation (TSD). However, connectivity between the amygdala and cerebral cortex due to TSD remains to be elucidated. In this study, we used resting-state functional MRI (fMRI) to investigate the functional connectivity changes of the basolateral amygdala (BLA) and centromedial amygdala (CMA) in the brain after 36 h of TSD. Materials and Methods Fourteen healthy adult men aged 25.9±2.3 years (range, 18–28 years) were enrolled in a within-subject crossover study. Using the BLA and CMA as separate seed regions, we examined resting-state functional connectivity with fMRI during rested wakefulness (RW) and after 36 h of TSD. Results TSD resulted in a significant decrease in the functional connectivity between the BLA and several executive control regions (left dorsolateral prefrontal cortex [DLPFC], right dorsal anterior cingulate cortex [ACC], right inferior frontal gyrus [IFG]). Increased functional connectivity was found between the BLA and areas including the left posterior cingulate cortex/precuneus (PCC/PrCu) and right parahippocampal gyrus. With regard to CMA, increased functional connectivity was observed with the rostral anterior cingulate cortex (rACC) and right precentral gyrus. Conclusion These findings demonstrate that disturbance in amygdala related circuits may contribute to TSD psychophysiology and suggest that functional connectivity studies of the amygdala during the resting state may be used to discern aberrant patterns of coupling within these circuits after TSD.
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Affiliation(s)
- Yongcong Shao
- Beijing Institute of Basic Medical Sciences, Beijing, PR China
- Cognitive and Mental Health Research Center, Beijing, PR China
| | - Yu Lei
- Beijing Institute of Basic Medical Sciences, Beijing, PR China
- Cognitive and Mental Health Research Center, Beijing, PR China
| | - Lubin Wang
- Beijing Institute of Basic Medical Sciences, Beijing, PR China
- Cognitive and Mental Health Research Center, Beijing, PR China
| | - Tianye Zhai
- Beijing Institute of Basic Medical Sciences, Beijing, PR China
- Cognitive and Mental Health Research Center, Beijing, PR China
| | - Xiao Jin
- Beijing Institute of Basic Medical Sciences, Beijing, PR China
- Cognitive and Mental Health Research Center, Beijing, PR China
| | - Wei Ni
- Beijing Institute of Basic Medical Sciences, Beijing, PR China
- Cognitive and Mental Health Research Center, Beijing, PR China
| | - Yue Yang
- Beijing Institute of Basic Medical Sciences, Beijing, PR China
- Cognitive and Mental Health Research Center, Beijing, PR China
| | - Shuwen Tan
- Beijing Institute of Basic Medical Sciences, Beijing, PR China
- Cognitive and Mental Health Research Center, Beijing, PR China
| | - Bo Wen
- Beijing Institute of Basic Medical Sciences, Beijing, PR China
| | - Enmao Ye
- Beijing Institute of Basic Medical Sciences, Beijing, PR China
- Cognitive and Mental Health Research Center, Beijing, PR China
- * E-mail: (EY); (ZY)
| | - Zheng Yang
- Beijing Institute of Basic Medical Sciences, Beijing, PR China
- Cognitive and Mental Health Research Center, Beijing, PR China
- * E-mail: (EY); (ZY)
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90
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What Is Lost During Dreamless Sleep: The Relationship Between Neural Connectivity Patterns and Consciousness. JOURNAL OF EUROPEAN PSYCHOLOGY STUDENTS 2014. [DOI: 10.5334/jeps.cj] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Resting-state blood oxygen level-dependent functional magnetic resonance imaging for presurgical planning. Neuroimaging Clin N Am 2014; 24:655-69. [PMID: 25441506 DOI: 10.1016/j.nic.2014.07.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Resting-state functional MR imaging (rsfMR imaging) measures spontaneous fluctuations in the blood oxygen level-dependent (BOLD) signal and can be used to elucidate the brain's functional organization. It is used to simultaneously assess multiple distributed resting-state networks. Unlike task-based functional MR imaging, rsfMR imaging does not require task performance. This article presents a brief introduction of rsfMR imaging processing methods followed by a detailed discussion on the use of rsfMR imaging in presurgical planning. Example cases are provided to highlight the strengths and limitations of the technique.
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Verweij IM, Romeijn N, Smit DJ, Piantoni G, Van Someren EJ, van der Werf YD. Sleep deprivation leads to a loss of functional connectivity in frontal brain regions. BMC Neurosci 2014; 15:88. [PMID: 25038817 PMCID: PMC4108786 DOI: 10.1186/1471-2202-15-88] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Accepted: 07/09/2014] [Indexed: 11/10/2022] Open
Abstract
Background The restorative effect of sleep on waking brain activity remains poorly understood. Previous studies have compared overall neural network characteristics after normal sleep and sleep deprivation. To study whether sleep and sleep deprivation might differentially affect subsequent connectivity characteristics in different brain regions, we performed a within-subject study of resting state brain activity using the graph theory framework adapted for the individual electrode level. In balanced order, we obtained high-density resting state electroencephalography (EEG) in 8 healthy participants, during a day following normal sleep and during a day following total sleep deprivation. We computed topographical maps of graph theoretical parameters describing local clustering and path length characteristics from functional connectivity matrices, based on synchronization likelihood, in five different frequency bands. A non-parametric permutation analysis with cluster correction for multiple comparisons was applied to assess significance of topographical changes in clustering coefficient and path length. Results Significant changes in graph theoretical parameters were only found on the scalp overlying the prefrontal cortex, where the clustering coefficient (local integration) decreased in the alpha frequency band and the path length (global integration) increased in the theta frequency band. These changes occurred regardless, and independent of, changes in power due to the sleep deprivation procedure. Conclusions The findings indicate that sleep deprivation most strongly affects the functional connectivity of prefrontal cortical areas. The findings extend those of previous studies, which showed sleep deprivation to predominantly affect functions mediated by the prefrontal cortex, such as working memory. Together, these findings suggest that the restorative effect of sleep is especially relevant for the maintenance of functional connectivity of prefrontal brain regions.
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Affiliation(s)
| | | | | | | | | | - Ysbrand D van der Werf
- Netherlands Institute for Neuroscience, an Institute of the Royal Netherlands Academy of Arts and Sciences, Meibergdreef 47, 1105 BA Amsterdam, the Netherlands.
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Chua ECP, Yeo SC, Lee ITG, Tan LC, Lau P, Cai S, Zhang X, Puvanendran K, Gooley JJ. Sustained attention performance during sleep deprivation associates with instability in behavior and physiologic measures at baseline. Sleep 2014; 37:27-39. [PMID: 24470693 PMCID: PMC3902867 DOI: 10.5665/sleep.3302] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
STUDY OBJECTIVES To identify baseline behavioral and physiologic markers that associate with individual differences in sustained attention during sleep deprivation. DESIGN In a retrospective study, ocular, electrocardiogram, and electroencephalogram (EEG) measures were compared in subjects who were characterized as resilient (n = 15) or vulnerable (n = 15) to the effects of total sleep deprivation on sustained attention. SETTING Chronobiology and Sleep Laboratory, Duke-NUS Graduate Medical School Singapore. PARTICIPANTS Healthy volunteers aged 22-32 years from the general population. INTERVENTIONS Subjects were kept awake for at least 26 hours under constant environmental conditions. Every 2 hours, sustained attention was assessed using a 10-minute psychomotor vigilance task (PVT). MEASUREMENTS AND RESULTS During baseline sleep and recovery sleep, EEG slow wave activity was similar in resilient versus vulnerable subjects, suggesting that individual differences in vulnerability to sleep loss were not related to differences in homeostatic sleep regulation. Rather, irrespective of time elapsed since wake, subjects who were vulnerable to sleep deprivation exhibited slower and more variable PVT response times, lower and more variable heart rate, and higher and more variable EEG spectral power in the theta frequency band (6.0-7.5 Hz). CONCLUSIONS Performance decrements in sustained attention during sleep deprivation associate with instability in behavioral and physiologic measures at baseline. Small individual differences in sustained attention that are present at baseline are amplified during prolonged wakefulness, thus contributing to large between-subjects differences in performance and sleepiness.
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Affiliation(s)
- Eric Chern-Pin Chua
- Program in Neuroscience and Behavioral Disorders, Duke-NUS Graduate Medical School Singapore, Singapore
| | | | - Ivan Tian-Guang Lee
- Program in Neuroscience and Behavioral Disorders, Duke-NUS Graduate Medical School Singapore, Singapore
| | - Luuan-Chin Tan
- Program in Neuroscience and Behavioral Disorders, Duke-NUS Graduate Medical School Singapore, Singapore
| | - Pauline Lau
- Program in Neuroscience and Behavioral Disorders, Duke-NUS Graduate Medical School Singapore, Singapore
| | - Shiwei Cai
- Program in Neuroscience and Behavioral Disorders, Duke-NUS Graduate Medical School Singapore, Singapore
- Department of Physiology, National University of Singapore, Singapore
| | - Xiaodong Zhang
- Program in Neuroscience and Behavioral Disorders, Duke-NUS Graduate Medical School Singapore, Singapore
- Department of Physiology, National University of Singapore, Singapore
- Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, NC
| | | | - Joshua J. Gooley
- Program in Neuroscience and Behavioral Disorders, Duke-NUS Graduate Medical School Singapore, Singapore
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Khalsa S, Mayhew SD, Chechlacz M, Bagary M, Bagshaw AP. The structural and functional connectivity of the posterior cingulate cortex: comparison between deterministic and probabilistic tractography for the investigation of structure-function relationships. Neuroimage 2013; 102 Pt 1:118-27. [PMID: 24365673 DOI: 10.1016/j.neuroimage.2013.12.022] [Citation(s) in RCA: 133] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Revised: 10/23/2013] [Accepted: 12/11/2013] [Indexed: 11/19/2022] Open
Abstract
The default mode network (DMN) is one of the most studied resting-state networks, and is thought to be involved in the maintenance of consciousness within the alert human brain. Although many studies have examined the functional connectivity (FC) of the DMN, few have investigated its underlying structural connectivity (SC), or the relationship between the two. We investigated this question in fifteen healthy subjects, concentrating on connections to the precuneus/posterior cingulate cortex (PCC), commonly considered as the central node of the DMN. We used group independent component analysis (GICA) and seed-based correlation analysis of fMRI data to quantify FC, and streamline and probabilistic tractography to identify structural tracts from diffusion tensor imaging (DTI) data. We first assessed the presence of structural connections between the DMN regions identified with GICA. Of the 15 subjects, when using the probabilistic approach 15 (15) demonstrated connections between the PCC and mesial prefrontal cortex (mPFC), 11 (15) showed connections from the PCC to the right inferior parietal cortex (rIPC) and 8 (15) to the left IPC. Next, we assessed the strength of FC (magnitude of temporal correlation) and SC (mean fractional anisotropy of reconstructed tracts (streamline), number of super-threshold voxels within the mask region (probabilistic)). The lIPC had significantly reduced FC to the PCC compared to the mPFC and rIPC. No difference in SC strength between connections was found using the streamline approach. For the probabilistic approach, mPFC had significantly lower SC than both IPCs. The two measures of SC strength were significantly correlated, but not for all paired connections. Finally, we observed a significant correlation between SC and FC for both tractography approaches when data were pooled across PCC-lIPL, PCC-rIPL and PCC-mPFC connections, and for some individual paired connections. Our results suggest that the streamline approach is advantageous for characterising the connectivity of long white matter tracts (PCC-mPFC), whilst the probabilistic approach was more reliable at identifying PCC-IPC connections. The direct comparison of FC and SC indicated that pairs of nodes with stronger structural connections also had stronger functional connectivity, and that this was maintained with both tractography approaches. Whilst the definition of SC strength remains controversial, our results could be considered to provide some degree of validation for the measures of SC strength that we have used. Direct comparisons of SC and FC are necessary in order to understand the structural basis of functional connectivity, and to characterise and quantify the changes in the brain's functional architecture that occur as a result of normal physiology or pathology.
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Affiliation(s)
- Sakh Khalsa
- School of Psychology, University of Birmingham, Birmingham, UK; Birmingham University Imaging Centre (BUIC), University of Birmingham, Birmingham, UK; Department of Neuropsychiatry, The Barberry Centre for Mental Health, Birmingham, UK
| | - Stephen D Mayhew
- School of Psychology, University of Birmingham, Birmingham, UK; Birmingham University Imaging Centre (BUIC), University of Birmingham, Birmingham, UK
| | | | - Manny Bagary
- Department of Neuropsychiatry, The Barberry Centre for Mental Health, Birmingham, UK
| | - Andrew P Bagshaw
- School of Psychology, University of Birmingham, Birmingham, UK; Birmingham University Imaging Centre (BUIC), University of Birmingham, Birmingham, UK.
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95
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Sleep deprivation increases dorsal nexus connectivity to the dorsolateral prefrontal cortex in humans. Proc Natl Acad Sci U S A 2013; 110:19597-602. [PMID: 24218598 DOI: 10.1073/pnas.1317010110] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
In many patients with major depressive disorder, sleep deprivation, or wake therapy, induces an immediate but often transient antidepressant response. It is known from brain imaging studies that changes in anterior cingulate and dorsolateral prefrontal cortex activity correlate with a relief of depression symptoms. Recently, resting-state functional magnetic resonance imaging revealed that brain network connectivity via the dorsal nexus (DN), a cortical area in the dorsomedial prefrontal cortex, is dramatically increased in depressed patients. To investigate whether an alteration in DN connectivity could provide a biomarker of therapy response and to determine brain mechanisms of action underlying sleep deprivations antidepressant effects, we examined its influence on resting state default mode network and DN connectivity in healthy humans. Our findings show that sleep deprivation reduced functional connectivity between posterior cingulate cortex and bilateral anterior cingulate cortex (Brodmann area 32), and enhanced connectivity between DN and distinct areas in right dorsolateral prefrontal cortex (Brodmann area 10). These findings are consistent with resolution of dysfunctional brain network connectivity changes observed in depression and suggest changes in prefrontal connectivity with the DN as a brain mechanism of antidepressant therapy action.
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96
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Ward AM, McLaren DG, Schultz AP, Chhatwal J, Boot BP, Hedden T, Sperling RA. Daytime sleepiness is associated with decreased default mode network connectivity in both young and cognitively intact elderly subjects. Sleep 2013; 36:1609-15. [PMID: 24179292 DOI: 10.5665/sleep.3108] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
STUDY OBJECTIVES Sleep deprivation and daytime somnolence impair numerous aspects of physical, cognitive, and memory performance. However, most studies examining the effect of somnolence on brain function focus on acute sleep restriction in young adults. We examine the relationship between chronic daytime somnolence and connectivity in six brain networks in both young and elderly subjects using stimulus-free resting-state functional magnetic resonance imaging. DESIGN Cross-sectional. SETTING Outpatient research at the Massachusetts General Hospital. PARTICIPANTS Young (n = 27) and elderly (n = 84) healthy, cognitively normal volunteers. INTERVENTIONS None. MEASUREMENTS AND RESULTS Compared with young subjects, cognitively normal elderly adults report less daytime somnolence on the Epworth Sleepiness Scale (ESS) (P = 0.019) and display reduced default mode network (DMN) connectivity (P = 0.004). Across all subjects, increasing daytime sleepiness was associated with decreasing functional connectivity in the DMN (P = 0.003, partial r of ESS = -0.29). There was no difference in the slope of this relationship between young adults and elderly subjects. No other cortical networks were correlated with daytime sleepiness. Daytime sleepiness and DMN connectivity were not related to sex, brain structure, or body mass index. CONCLUSIONS These findings suggest that daytime sleepiness is associated with impaired connectivity of the DMN in a manner that is distinct from the effects of aging. This association is important to consider in any study using DMN connectivity as a biomarker. Additionally, these results may help identify those subjects at risk for future memory decline.
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Affiliation(s)
- Andrew M Ward
- Athinoula A. Martinos Center for Biomedical Imaging, Charlestown, MA ; Department of Neurology, Brigham and Women's Hospital, Boston, MA ; Departments of Neurology, Massachusetts General Hospital, Boston, MA ; Harvard Medical School, Boston, MA
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97
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Shao Y, Wang L, Ye E, Jin X, Ni W, Yang Y, Wen B, Hu D, Yang Z. Decreased thalamocortical functional connectivity after 36 hours of total sleep deprivation: evidence from resting state FMRI. PLoS One 2013; 8:e78830. [PMID: 24205327 PMCID: PMC3808277 DOI: 10.1371/journal.pone.0078830] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Accepted: 09/16/2013] [Indexed: 11/19/2022] Open
Abstract
Objectives The thalamus and cerebral cortex are connected via topographically organized, reciprocal connections, which hold a key function in segregating internally and externally directed awareness information. Previous task-related studies have revealed altered activities of the thalamus after total sleep deprivation (TSD). However, it is still unclear how TSD impacts on the communication between the thalamus and cerebral cortex. In this study, we examined changes of thalamocortical functional connectivity after 36 hours of total sleep deprivation by using resting state function MRI (fMRI). Materials and Methods Fourteen healthy volunteers were recruited and performed fMRI scans before and after 36 hours of TSD. Seed-based functional connectivity analysis was employed and differences of thalamocortical functional connectivity were tested between the rested wakefulness (RW) and TSD conditions. Results We found that the right thalamus showed decreased functional connectivity with the right parahippocampal gyrus, right middle temporal gyrus and right superior frontal gyrus in the resting brain after TSD when compared with that after normal sleep. As to the left thalamus, decreased connectivity was found with the right medial frontal gyrus, bilateral middle temporal gyri and left superior frontal gyrus. Conclusion These findings suggest disruptive changes of the thalamocortical functional connectivity after TSD, which may lead to the decline of the arousal level and information integration, and subsequently, influence the human cognitive functions.
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Affiliation(s)
- Yongcong Shao
- Beijing Institute of Basic Medical Sciences, Beijing, PR China
- Cognitive and Mental Health Research Center, Beijing, PR China
| | - Lubin Wang
- Beijing Institute of Basic Medical Sciences, Beijing, PR China
- College of Mechatronics and Automation, National University of Defense Technology, Changsha, Hunan, PR China
| | - Enmao Ye
- Beijing Institute of Basic Medical Sciences, Beijing, PR China
- Cognitive and Mental Health Research Center, Beijing, PR China
| | - Xiao Jin
- Beijing Institute of Basic Medical Sciences, Beijing, PR China
- Cognitive and Mental Health Research Center, Beijing, PR China
| | - Wei Ni
- Beijing Institute of Basic Medical Sciences, Beijing, PR China
- Cognitive and Mental Health Research Center, Beijing, PR China
| | - Yue Yang
- Beijing Institute of Basic Medical Sciences, Beijing, PR China
- Cognitive and Mental Health Research Center, Beijing, PR China
| | - Bo Wen
- Department of Radiology, The General Hospital of the People's Liberation Army, Beijing, PR China
| | - Dewen Hu
- College of Mechatronics and Automation, National University of Defense Technology, Changsha, Hunan, PR China
- * E-mail: (ZY); (DH)
| | - Zheng Yang
- Beijing Institute of Basic Medical Sciences, Beijing, PR China
- Cognitive and Mental Health Research Center, Beijing, PR China
- * E-mail: (ZY); (DH)
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98
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Castellanos FX, Di Martino A, Craddock RC, Mehta AD, Milham MP. Clinical applications of the functional connectome. Neuroimage 2013; 80:527-40. [PMID: 23631991 PMCID: PMC3809093 DOI: 10.1016/j.neuroimage.2013.04.083] [Citation(s) in RCA: 213] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Revised: 04/18/2013] [Accepted: 04/20/2013] [Indexed: 12/26/2022] Open
Abstract
Central to the development of clinical applications of functional connectomics for neurology and psychiatry is the discovery and validation of biomarkers. Resting state fMRI (R-fMRI) is emerging as a mainstream approach for imaging-based biomarker identification, detecting variations in the functional connectome that can be attributed to clinical variables (e.g., diagnostic status). Despite growing enthusiasm, many challenges remain. Here, we assess evidence of the readiness of R-fMRI based functional connectomics to lead to clinically meaningful biomarker identification through the lens of the criteria used to evaluate clinical tests (i.e., validity, reliability, sensitivity, specificity, and applicability). We focus on current R-fMRI-based prediction efforts, and survey R-fMRI used for neurosurgical planning. We identify gaps and needs for R-fMRI-based biomarker identification, highlighting the potential of emerging conceptual, analytical and cultural innovations (e.g., the Research Domain Criteria Project (RDoC), open science initiatives, and Big Data) to address them. Additionally, we note the need to expand future efforts beyond identification of biomarkers for disease status alone to include clinical variables related to risk, expected treatment response and prognosis.
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Affiliation(s)
- F. Xavier Castellanos
- Phyllis Green and Randolph Cowen Institute for Pediatric Neuroscience, New York University Child Study Center, New York, NY 10016, USA
- Nathan Kline Institute for Psychiatric Research, Orangeburg, NY 10962, USA
| | - Adriana Di Martino
- Phyllis Green and Randolph Cowen Institute for Pediatric Neuroscience, New York University Child Study Center, New York, NY 10016, USA
| | - R. Cameron Craddock
- Nathan Kline Institute for Psychiatric Research, Orangeburg, NY 10962, USA
- Center for the Developing Brain, Child Mind Institute, New York, NY 10022, USA
| | - Ashesh D. Mehta
- Department of Neurosurgery, Hofstra North Shore LIJ School of Medicine and Feinstein Institute for Medical Research, Manhasset, NY 11030, USA, (F.X. Castellanos)
| | - Michael P. Milham
- Nathan Kline Institute for Psychiatric Research, Orangeburg, NY 10962, USA
- Center for the Developing Brain, Child Mind Institute, New York, NY 10022, USA
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99
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Basner M, Rao H, Goel N, Dinges DF. Sleep deprivation and neurobehavioral dynamics. Curr Opin Neurobiol 2013; 23:854-63. [PMID: 23523374 PMCID: PMC3700596 DOI: 10.1016/j.conb.2013.02.008] [Citation(s) in RCA: 126] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2013] [Revised: 02/18/2013] [Accepted: 02/19/2013] [Indexed: 11/18/2022]
Abstract
Lifestyles involving sleep deprivation are common, despite mounting evidence that both acute total sleep deprivation and chronically restricted sleep degrade neurobehavioral functions associated with arousal, attention, memory and state stability. Current research suggests dynamic differences in the way the central nervous system responds to acute versus chronic sleep restriction, which is reflected in new models of sleep-wake regulation. Chronic sleep restriction likely induces long-term neuromodulatory changes in brain physiology that could explain why recovery from it may require more time than from acute sleep loss. High intraclass correlations in neurobehavioral responses to sleep loss suggest that these trait-like differences are phenotypic and may include genetic components. Sleep deprivation induces changes in brain metabolism and neural activation that involve distributed networks and connectivity.
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Affiliation(s)
- Mathias Basner
- Unit of Experimental Psychiatry, Division of Sleep and Chronobiology, Department of Psychiatry, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA.
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100
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Chee MWL, MBBS, FRCP (Edin). Imaging the Sleep Deprived Brain: A Brief Review. ACTA ACUST UNITED AC 2013. [DOI: 10.13078/jksrs.13001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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