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Whybird M, Coats R, Vuister T, Harrison S, Booth S, Burke M. The role of the posterior parietal cortex on cognition: An exploratory study. Brain Res 2021; 1764:147452. [PMID: 33838128 DOI: 10.1016/j.brainres.2021.147452] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 03/03/2021] [Accepted: 03/23/2021] [Indexed: 10/21/2022]
Abstract
Theta burst stimulation (TBS) is a form of repetitive transcranial magnetic stimulation (rTMS) that can be used to increase (intermittent TBS) or reduce (continuous TBS) cortical excitability. The current study provides a preliminary report of the effects of iTBS and cTBS in healthy young adults, to investigate the causal role of the posterior parietal cortex (PPC) during the performance of four cognitive functions: attention, inhibition, sequence learning and working memory. A 2 × 2 repeated measures design was incorporated using hemisphere (left/right) and TBS type (iTBS/cTBS) as the independent variables. 20 participants performed the cognitive tasks both before and after TBS stimulation in 4 counterbalanced experimental sessions (left cTBS, right cTBS, left iTBS and right iTBS) spaced 1 week apart. No change in performance was identified for the attentional cueing task after TBS stimulation, however TBS applied to the left PPC decreased reaction time when inhibiting a reflexive response. The sequence learning task revealed differential effects for encoding of the sequence versus the learnt items. cTBS on the right hemisphere resulted in faster responses to learnt sequences, and iTBS on the right hemisphere reduced reaction times during the initial encoding of the sequence. The reaction times in the 2-back working memory task were increased when TBS stimulation was applied to the right hemisphere. Results reveal clear differential effects for tasks explored, and more specifically where TBS stimulation on right PPC could provide a potential for further investigation into improving oculomotor learning by inducing plasticity-like mechanisms in the brain.
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Affiliation(s)
- Marlee Whybird
- School of Psychology, University of Leeds, Leeds LS2 9JT, UK
| | - Rachel Coats
- School of Psychology, University of Leeds, Leeds LS2 9JT, UK
| | - Tessa Vuister
- School of Psychology, University of Leeds, Leeds LS2 9JT, UK
| | - Sophie Harrison
- School of Psychology, University of Leeds, Leeds LS2 9JT, UK
| | - Samantha Booth
- School of Psychology, University of Leeds, Leeds LS2 9JT, UK
| | - Melanie Burke
- School of Psychology, University of Leeds, Leeds LS2 9JT, UK.
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2
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Gilissen SR, Arckens L. Posterior parietal cortex contributions to cross-modal brain plasticity upon sensory loss. Curr Opin Neurobiol 2020; 67:16-25. [PMID: 32777707 DOI: 10.1016/j.conb.2020.07.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 06/30/2020] [Accepted: 07/01/2020] [Indexed: 12/18/2022]
Abstract
Sensory loss causes compensatory behavior, like echolocation upon vision loss or improved visual motion detection upon deafness. This is enabled by recruitment of the deprived cortical area by the intact senses. Such cross-modal plasticity can however hamper rehabilitation via sensory substitution devices. To steer rehabilitation towards the desired outcome for the patient, having control over the cross-modal take-over is essential. Evidence accumulates to support a role for the posterior parietal cortex (PPC) in multimodal plasticity. This area shows increased activity after sensory loss, keeping similar functions but driven by other senses. Patient-specific factors like stress, social situation, age and attention, have a significant influence on the PPC and on cross-modal plasticity. We propose that understanding the response of the PPC to sensory loss and context is extremely important for determining the best possible implant-based therapies, and that mouse research holds potential to help unraveling the underlying anatomical, cellular and neuromodulatory mechanisms.
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Affiliation(s)
- Sara Rj Gilissen
- KU Leuven, Department of Biology & Leuven Brain Institute, 3000 Leuven, Belgium
| | - Lutgarde Arckens
- KU Leuven, Department of Biology & Leuven Brain Institute, 3000 Leuven, Belgium.
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3
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Bjerre AS, Palmer LM. Probing Cortical Activity During Head-Fixed Behavior. Front Mol Neurosci 2020; 13:30. [PMID: 32180705 PMCID: PMC7059801 DOI: 10.3389/fnmol.2020.00030] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Accepted: 02/10/2020] [Indexed: 01/20/2023] Open
Abstract
The cortex is crucial for many behaviors, ranging from sensory-based behaviors to working memory and social behaviors. To gain an in-depth understanding of the contribution to these behaviors, cellular and sub-cellular recordings from both individual and populations of cortical neurons are vital. However, techniques allowing such recordings, such as two-photon imaging and whole-cell electrophysiology, require absolute stability of the head, a requirement not often fulfilled in freely moving animals. Here, we review and compare behavioral paradigms that have been developed and adapted for the head-fixed preparation, which together offer the needed stability for live recordings of neural activity in behaving animals. We also review how the head-fixed preparation has been used to explore the function of primary sensory cortices, posterior parietal cortex (PPC) and anterior lateral motor (ALM) cortex in sensory-based behavioral tasks, while also discussing the considerations of performing such recordings. Overall, this review highlights the head-fixed preparation as allowing in-depth investigation into the neural activity underlying behaviors by providing highly controllable settings for precise stimuli presentation which can be combined with behavioral paradigms ranging from simple sensory detection tasks to complex, cross-modal, memory-guided decision-making tasks.
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Affiliation(s)
- Ann-Sofie Bjerre
- Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, Australia
| | - Lucy M Palmer
- Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, Australia
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4
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Hakon J, Quattromani MJ, Sjölund C, Tomasevic G, Carey L, Lee JM, Ruscher K, Wieloch T, Bauer AQ. Multisensory stimulation improves functional recovery and resting-state functional connectivity in the mouse brain after stroke. NEUROIMAGE-CLINICAL 2017; 17:717-730. [PMID: 29264113 PMCID: PMC5726755 DOI: 10.1016/j.nicl.2017.11.022] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Revised: 10/27/2017] [Accepted: 11/23/2017] [Indexed: 10/25/2022]
Abstract
Stroke causes direct structural damage to local brain networks and indirect functional damage to distant brain regions. Neuroplasticity after stroke involves molecular changes within perilesional tissue that can be influenced by regions functionally connected to the site of injury. Spontaneous functional recovery can be enhanced by rehabilitative strategies, which provides experience-driven cell signaling in the brain that enhances plasticity. Functional neuroimaging in humans and rodents has shown that spontaneous recovery of sensorimotor function after stroke is associated with changes in resting-state functional connectivity (RS-FC) within and across brain networks. At the molecular level, GABAergic inhibitory interneurons can modulate brain plasticity in peri-infarct and remote brain regions. Among this cell-type, a decrease in parvalbumin (PV)-immunoreactivity has been associated with improved behavioral outcome. Subjecting rodents to multisensory stimulation through exposure to an enriched environment (EE) enhances brain plasticity and recovery of function after stroke. Yet, how multisensory stimulation relates to RS-FC has not been determined. In this study, we investigated the effect of EE on recovery of RS-FC and behavior in mice after stroke, and if EE-related changes in RS-FC were associated with levels of PV-expressing neurons. Photothrombotic stroke was induced in the sensorimotor cortex. Beginning 2 days after stroke, mice were housed in either standard environment (STD) or EE for 12 days. Housing in EE significantly improved lost tactile-proprioceptive function compared to mice housed in STD environment. RS-FC in the mouse was measured by optical intrinsic signal imaging 14 days after stroke or sham surgery. Stroke induced a marked reduction in RS-FC within several perilesional and remote brain regions. EE partially restored interhemispheric homotopic RS-FC between spared motor regions, particularly posterior secondary motor. Compared to mice housed in STD cages, EE exposure lead to increased RS-FC between posterior secondary motor regions and contralesional posterior parietal and retrosplenial regions. The increased regional RS-FC observed in EE mice after stroke was significantly correlated with decreased PV-immunoreactivity in the contralesional posterior motor region. In conclusion, experimental stroke and subsequent housing in EE induces dynamic changes in RS-FC in the mouse brain. Multisensory stimulation associated with EE enhances RS-FC among distinct brain regions relevant for recovery of sensorimotor function and controlled movements that may involve PV/GABA interneurons. Our results indicate that targeting neural circuitry involving spared motor regions across hemispheres by neuromodulation and multimodal sensory stimulation could improve rehabilitation after stroke.
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Key Words
- EE, enriched environment
- Enriched environment
- GSR, global signal regression
- M1, primary motor cortex
- M2, secondary motor cortex
- M2p, posterior secondary motor cortex
- MSR, multiple signal regression
- NDc, interhemispheric (contralateral) node degree
- NDi, intrahemispheric node degree
- Optical imaging
- PP, posterior parietal cortex
- PV, parvalbumin
- Parvalbumin
- ROI, region of interest
- RS, retrosplenial cortex
- RS-FC, resting-state functional connectivity
- Recovery
- Resting-state functional connectivity
- SFL, somatosensory forelimb cortex
- STD, standard environment
- Stroke
- VIS, visual cortex
- fcOIS, functional connectivity optical intrinsic signal imaging
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Affiliation(s)
- Jakob Hakon
- Laboratory for Experimental Brain Research, Division of Neurosurgery, Department of Clinical Sciences, Lund University, BMC A13, 22184 Lund, Sweden.
| | - Miriana Jlenia Quattromani
- Laboratory for Experimental Brain Research, Division of Neurosurgery, Department of Clinical Sciences, Lund University, BMC A13, 22184 Lund, Sweden
| | - Carin Sjölund
- Laboratory for Experimental Brain Research, Division of Neurosurgery, Department of Clinical Sciences, Lund University, BMC A13, 22184 Lund, Sweden
| | - Gregor Tomasevic
- Laboratory for Experimental Brain Research, Division of Neurosurgery, Department of Clinical Sciences, Lund University, BMC A13, 22184 Lund, Sweden; Department of Neurosurgery, University Hospital of Lund, Lund, Sweden
| | - Leeanne Carey
- School of Allied Health, La Trobe University, Melbourne, Vic., Australia; Neurorehabilitation and Recovery Laboratory, Florey Institute of Neuroscience and Mental Health, Melbourne, Vic., Australia
| | - Jin-Moo Lee
- Department of Radiology, Washington University, Saint Louis, MO 63110, USA; Department of Neurology, Washington University, Saint Louis, MO 63110, USA; Department of Biomedical Engineering, Washington University, Saint Louis, MO 63110, USA
| | - Karsten Ruscher
- Laboratory for Experimental Brain Research, Division of Neurosurgery, Department of Clinical Sciences, Lund University, BMC A13, 22184 Lund, Sweden
| | - Tadeusz Wieloch
- Laboratory for Experimental Brain Research, Division of Neurosurgery, Department of Clinical Sciences, Lund University, BMC A13, 22184 Lund, Sweden
| | - Adam Q Bauer
- Department of Radiology, Washington University, Saint Louis, MO 63110, USA
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5
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Mohan H, de Haan R, Mansvelder HD, de Kock CPJ. The posterior parietal cortex as integrative hub for whisker sensorimotor information. Neuroscience 2017. [PMID: 28642168 DOI: 10.1016/j.neuroscience.2017.06.020] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Our daily life consists of a continuous interplay between incoming sensory information and outgoing motor plans. Particularly during goal-directed behavior and active exploration of the sensory environment, brain circuits are merging sensory and motor signals. This is referred to as sensorimotor integration and is relevant for locomotion, vision or tactile exploration. The somatosensory (tactile) system is an attractive modality to study sensorimotor integration in health and disease, motivated by the need for revolutionary technology that builds upon conceptual understanding of sensorimotor integration, such as brain-machine-interfaces and neuro-prosthetics. In this perspective, we focus on the rat whisker system and put forward the posterior parietal cortex as a potential circuit where sensorimotor integration could occur during active somatosensation.
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Affiliation(s)
- Hemanth Mohan
- Department of Integrative Neurophysiology, Center for Neurogenomics and Cognitive Research, VU University Amsterdam, De Boelelaan 1085, Amsterdam 1081 HV, The Netherlands
| | - Roel de Haan
- Department of Integrative Neurophysiology, Center for Neurogenomics and Cognitive Research, VU University Amsterdam, De Boelelaan 1085, Amsterdam 1081 HV, The Netherlands
| | - Huibert D Mansvelder
- Department of Integrative Neurophysiology, Center for Neurogenomics and Cognitive Research, VU University Amsterdam, De Boelelaan 1085, Amsterdam 1081 HV, The Netherlands
| | - Christiaan P J de Kock
- Department of Integrative Neurophysiology, Center for Neurogenomics and Cognitive Research, VU University Amsterdam, De Boelelaan 1085, Amsterdam 1081 HV, The Netherlands.
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Bennys K, Gabelle A, Berr C, De Verbizier D, Andrieu S, Vellas B, Touchon J. Cognitive Event-Related Potential, an Early Diagnosis Biomarker in Frail Elderly Subjects: The ERP-MAPT-PLUS Ancillary Study. J Alzheimers Dis 2017; 58:87-97. [DOI: 10.3233/jad-161012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Karim Bennys
- Memory Research and Resource Center for Alzheimer’s Disease, Department of Neurology, University Hospital of Montpellier, Montpellier, France
- Clinical Neurophysiology Unit, Department of Neurology, University Hospital of Montpellier, France
| | - Audrey Gabelle
- Memory Research and Resource Center for Alzheimer’s Disease, Department of Neurology, University Hospital of Montpellier, Montpellier, France
- INSERM U1183, University of Montpellier, France
| | | | - Delphine De Verbizier
- Department of Nuclear Medicine, Gui de Chauliac University Hospital, Montpellier, France
| | - Sandrine Andrieu
- Gérontopôle, Department of Geriatrics, CHU Toulouse, Purpan University Hospital, Toulouse, France
- INSERM UMR 1027, Toulouse, France
- University of Toulouse III, Toulouse, France
- Department of Epidemiology and Public Health, CHU Toulouse, Toulouse, France
| | - Bruno Vellas
- Gérontopôle, Department of Geriatrics, CHU Toulouse, Purpan University Hospital, Toulouse, France
- INSERM UMR 1027, Toulouse, France
- University of Toulouse III, Toulouse, France
| | - Jacques Touchon
- Memory Research and Resource Center for Alzheimer’s Disease, Department of Neurology, University Hospital of Montpellier, Montpellier, France
- INSERM U1061, University of Montpellier, France
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7
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Schiffino FL, Holland PC. Secondary visual cortex is critical to the expression of surprise-induced enhancements in cue associability in rats. Eur J Neurosci 2016; 44:1870-7. [PMID: 27225533 DOI: 10.1111/ejn.13286] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 05/19/2016] [Accepted: 05/24/2016] [Indexed: 01/29/2023]
Abstract
Considerable evidence indicates that reinforcement prediction error, the difference between the obtained and expected reinforcer values, modulates attention to potential cues for reinforcement. The surprising delivery or omission of a reinforcer enhances the associability of the stimuli that were present when the error was induced, so that they more readily enter into new associations in the future. Previous research from our laboratory identified brain circuit elements critical to the enhancement of stimulus associability by omission of an expected event and to the subsequent expression of that altered associability in more rapid learning. A key finding was that the rat posterior parietal cortex was essential during the encoding, consolidation and retrieval of associability memories that were altered by the surprising omission of an expected event in a serial prediction task. Here, we found that the function of adjacent secondary visual cortex was critical only to the expression of altered cue associability in that same task. This specialization of function is discussed in the context of broader cortical and subcortical networks for modulation of attention in associative learning, as well as recent anatomical investigations that suggest that the rodent posterior parietal cortex overlaps with and may subsume secondary visual cortex.
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Affiliation(s)
- Felipe L Schiffino
- Department of Psychological and Brain Sciences, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD, 21218, USA
| | - Peter C Holland
- Department of Psychological and Brain Sciences, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD, 21218, USA
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8
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Leroy C, Bourriez JL, Dujardin K, Molaee-Ardekani B, Babiloni C, Deplanque D, Ponchel A, Hennion S, Plomhause L, Devanne H, Deguil J, Payoux P, Blin O, Méligne D, Micallef J, Chauveau N, Lanteaume L, Vervueren C, Guimont F, Thalamas C, Cassé-Perrot C, Rouby F, Bordet R, Derambure P. A 15-day course of donepezil modulates spectral EEG dynamics related to target auditory stimuli in young, healthy adult volunteers. Clin Neurophysiol 2015; 130:863-875. [PMID: 26699666 DOI: 10.1016/j.clinph.2015.11.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Revised: 11/17/2015] [Accepted: 11/20/2015] [Indexed: 11/24/2022]
Abstract
OBJECTIVE To identify possible electroencephalographic (EEG) markers of donepezil's effect on cortical activity in young, healthy adult volunteers at the group level. METHODS Thirty subjects were administered a daily dose of either 5mg donepezil or placebo for 15days in a double-blind, randomized, cross-over trial. The electroencephalogram during an auditory oddball paradigm was recorded from 58 scalp electrodes. Current source density (CSD) transformations were applied to EEG epochs. The event-related potential (ERP), inter-trial coherence (ITC: the phase consistency of the EEG spectrum) and event-related spectral perturbation (ERSP: the EEG power spectrum relative to the baseline) were calculated for the target (oddball) stimuli. RESULTS The donepezil and placebo conditions differed in terms of the changes in delta/theta/alpha/beta ITC and ERSP in various regions of the scalp (especially the frontal electrodes) but not in terms of latency and amplitude of the P300-ERP component. CONCLUSION Our results suggest that ITC and ERSP analyses can provide EEG markers of donepezil's effects in young, healthy, adult volunteers at a group level. SIGNIFICANCE Novel EEG markers could be useful to assess the therapeutic potential of drug candidates in Alzheimer's disease in healthy volunteers prior to the initiation of Phase II/III clinical studies in patients.
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Affiliation(s)
- Christopher Leroy
- INSERM U1171, Lille University Medical Center, Lille, France; Department of Clinical Neurophysiology, Lille University Medical Center, Lille, France.
| | - Jean-Louis Bourriez
- INSERM U1171, Lille University Medical Center, Lille, France; Department of Clinical Neurophysiology, Lille University Medical Center, Lille, France
| | - Kathy Dujardin
- INSERM U1171, Lille University Medical Center, Lille, France; Department of Neurology and Movement Disorders, Lille University Medical Center, Lille, France
| | - Behnam Molaee-Ardekani
- INSERM U1171, Lille University Medical Center, Lille, France; Department of Clinical Neurophysiology, Lille University Medical Center, Lille, France
| | - Claudio Babiloni
- Department of Physiology and Pharmacology, University of Rome "La Sapienza", Rome, Italy; Department of Neuroscience, IRCCS San Raffaele Pisana, Rome, Italy
| | - Dominique Deplanque
- INSERM U1171, Lille University Medical Center, Lille, France; Department of Medical Pharmacology, Lille University Medical Center, Lille, France; CIC 1403 INSERM-CHU, Lille University Medical Center, Lille, France
| | - Amélie Ponchel
- INSERM U1171, Lille University Medical Center, Lille, France; Department of Medical Pharmacology, Lille University Medical Center, Lille, France
| | - Sophie Hennion
- INSERM U1171, Lille University Medical Center, Lille, France; Department of Clinical Neurophysiology, Lille University Medical Center, Lille, France
| | - Lucie Plomhause
- INSERM U1171, Lille University Medical Center, Lille, France; Department of Clinical Neurophysiology, Lille University Medical Center, Lille, France
| | - Hervé Devanne
- Department of Clinical Neurophysiology, Lille University Medical Center, Lille, France; ULCO, Calais, France
| | - Julie Deguil
- INSERM U1171, Lille University Medical Center, Lille, France; Department of Medical Pharmacology, Lille University Medical Center, Lille, France
| | - Pierre Payoux
- INSERM UMR 825 Brain Imaging and Neurological Dysfunctions, Toulouse, France
| | - Olivier Blin
- Department of Clinical Pharmacology, and CNRS UMR 7289, CIC-CPCET, Aix-Marseille University, Marseille, France
| | - Déborah Méligne
- INSERM UMR 825 Brain Imaging and Neurological Dysfunctions, Toulouse, France
| | - Joëlle Micallef
- Department of Clinical Pharmacology, and CNRS UMR 7289, CIC-CPCET, Aix-Marseille University, Marseille, France
| | - Nicolas Chauveau
- INSERM UMR 825 Brain Imaging and Neurological Dysfunctions, Toulouse, France
| | - Laura Lanteaume
- Department of Clinical Pharmacology, and CNRS UMR 7289, CIC-CPCET, Aix-Marseille University, Marseille, France
| | - Céline Vervueren
- INSERM UMR 825 Brain Imaging and Neurological Dysfunctions, Toulouse, France
| | - François Guimont
- Department of Clinical Pharmacology, and CNRS UMR 7289, CIC-CPCET, Aix-Marseille University, Marseille, France
| | - Claire Thalamas
- Department of Medical Pharmacology, INSERM CIC 1436, Toulouse University Medical Center, Toulouse, France
| | - Catherine Cassé-Perrot
- Department of Clinical Pharmacology, and CNRS UMR 7289, CIC-CPCET, Aix-Marseille University, Marseille, France
| | - Franck Rouby
- Department of Clinical Pharmacology, and CNRS UMR 7289, CIC-CPCET, Aix-Marseille University, Marseille, France
| | - Régis Bordet
- INSERM U1171, Lille University Medical Center, Lille, France; Department of Medical Pharmacology, Lille University Medical Center, Lille, France
| | - Philippe Derambure
- INSERM U1171, Lille University Medical Center, Lille, France; Department of Clinical Neurophysiology, Lille University Medical Center, Lille, France
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9
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Reches A, Laufer I, Ziv K, Cukierman G, McEvoy K, Ettinger M, Knight RT, Gazzaley A, Geva AB. Network dynamics predict improvement in working memory performance following donepezil administration in healthy young adults. Neuroimage 2013; 88:228-41. [PMID: 24269569 DOI: 10.1016/j.neuroimage.2013.11.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Revised: 11/11/2013] [Accepted: 11/14/2013] [Indexed: 11/28/2022] Open
Abstract
Attentional selection in the context of goal-directed behavior involves top-down modulation to enhance the contrast between relevant and irrelevant stimuli via enhancement and suppression of sensory cortical activity. Acetylcholine (ACh) is believed to be involved mechanistically in such attention processes. The objective of the current study was to examine the effects of donepezil, a cholinesterase inhibitor that increases synaptic levels of ACh, on the relationship between performance and network dynamics during a visual working memory (WM) task involving relevant and irrelevant stimuli. Electroencephalogram (EEG) activity was recorded in 14 healthy young adults while they performed a selective face/scene working memory task. Each participant received either placebo or donepezil (5mg, orally) on two different visits in a double-blinded study. To investigate the effects of donepezil on brain network dynamics we utilized a novel EEG-based Brain Network Activation (BNA) analysis method that isolates location-time-frequency interrelations among event-related potential (ERP) peaks and extracts condition-specific networks. The activation level of the network modulated by donepezil, reflected in terms of the degree of its dynamical organization, was positively correlated with WM performance. Further analyses revealed that the frontal-posterior theta-alpha sub-network comprised the critical regions whose activation level correlated with beneficial effects on cognitive performance. These results indicate that condition-specific EEG network analysis could potentially serve to predict beneficial effects of therapeutic treatment in working memory.
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Affiliation(s)
| | | | - K Ziv
- ElMindA Ltd., Herzliya, Israel
| | | | - K McEvoy
- University of California, Los Angeles School of Medicine, Los Angeles, CA, USA
| | | | - R T Knight
- Helen Wills Neuroscience Institute, University of California, Berkeley, CA, USA; Department of Psychology, University of California, Berkeley, CA, USA
| | - A Gazzaley
- Departments of Neurology, Physiology and Psychiatry, University of California San Francisco, San Francisco, CA, USA
| | - A B Geva
- ElMindA Ltd., Herzliya, Israel; Electrical and Computer Engineering, Ben Gurion University of the Negev, Beer Sheba, Israel
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10
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Constantinidis C, Bucci DJ, Rugg MD. Cognitive functions of the posterior parietal cortex. Front Integr Neurosci 2013; 7:35. [PMID: 23675328 PMCID: PMC3648698 DOI: 10.3389/fnint.2013.00035] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2013] [Accepted: 04/23/2013] [Indexed: 01/26/2023] Open
Affiliation(s)
- Christos Constantinidis
- Department of Neurobiology and Anatomy, Wake Forest School of Medicine Winston-Salem, NC, USA
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