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Kouti M, Ansari-Asl K, Namjoo E. EEG dynamic source imaging using a regularized optimization with spatio-temporal constraints. Med Biol Eng Comput 2024:10.1007/s11517-024-03125-9. [PMID: 38771431 DOI: 10.1007/s11517-024-03125-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 05/11/2024] [Indexed: 05/22/2024]
Abstract
One of the most important needs in neuroimaging is brain dynamic source imaging with high spatial and temporal resolution. EEG source imaging estimates the underlying sources from EEG recordings, which provides enhanced spatial resolution with intrinsically high temporal resolution. To ensure identifiability in the underdetermined source reconstruction problem, constraints on EEG sources are essential. This paper introduces a novel method for estimating source activities based on spatio-temporal constraints and a dynamic source imaging algorithm. The method enhances time resolution by incorporating temporal evolution of neural activity into a regularization function. Additionally, two spatial regularization constraints based on L 1 and L 2 norms are applied in the transformed domain to address both focal and spread neural activities, achieved through spatial gradient and Laplacian transform. Performance evaluation, conducted quantitatively using synthetic datasets, discusses the influence of parameters such as source extent, number of sources, correlation level, and SNR level on temporal and spatial metrics. Results demonstrate that the proposed method provides superior spatial and temporal reconstructions compared to state-of-the-art inverse solutions including STRAPS, sLORETA, SBL, dSPM, and MxNE. This improvement is attributed to the simultaneous integration of transformed spatial and temporal constraints. When applied to a real auditory ERP dataset, our algorithm accurately reconstructs brain source time series and locations, effectively identifying the origins of auditory evoked potentials. In conclusion, our proposed method with spatio-temporal constraints outperforms the state-of-the-art algorithms in estimating source distribution and time courses.
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Affiliation(s)
- Mayadeh Kouti
- Department of Electrical Engineering, Faculty of Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran
- Department of Electrical Engineering, Shohadaye Hoveizeh Campus of Technology, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - Karim Ansari-Asl
- Department of Electrical Engineering, Faculty of Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran.
| | - Ehsan Namjoo
- Department of Electrical Engineering, Faculty of Engineering, Shahid Chamran University of Ahvaz, Ahvaz, Iran
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2
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Mannarelli D, Pauletti C, Missori P, Trompetto C, Cotellessa F, Fattapposta F, Currà A. Cerebellum's Contribution to Attention, Executive Functions and Timing: Psychophysiological Evidence from Event-Related Potentials. Brain Sci 2023; 13:1683. [PMID: 38137131 PMCID: PMC10741792 DOI: 10.3390/brainsci13121683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 12/01/2023] [Accepted: 12/05/2023] [Indexed: 12/24/2023] Open
Abstract
Since 1998, when Schmahmann first proposed the concept of the "cognitive affective syndrome" that linked cerebellar damage to cognitive and emotional impairments, a substantial body of literature has emerged. Anatomical, neurophysiological, and functional neuroimaging data suggest that the cerebellum contributes to cognitive functions through specific cerebral-cerebellar connections organized in a series of parallel loops. The aim of this paper is to review the current findings on the involvement of the cerebellum in selective cognitive functions, using a psychophysiological perspective with event-related potentials (ERPs), alone or in combination with non-invasive brain stimulation techniques. ERPs represent a very informative method of monitoring cognitive functioning online and have the potential to serve as valuable biomarkers of brain dysfunction that is undetected by other traditional clinical tools. This review will focus on the data on attention, executive functions, and time processing obtained in healthy subjects and patients with varying clinical conditions, thus confirming the role of ERPs in understanding the role of the cerebellum in cognition and exploring the potential diagnostic and therapeutic implications of ERP-based assessments in patients.
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Affiliation(s)
- Daniela Mannarelli
- Department of Human Neurosciences, Sapienza University of Rome, Viale dell’Università 30, 00185 Rome, Italy; (D.M.); (C.P.); (P.M.); (F.F.)
| | - Caterina Pauletti
- Department of Human Neurosciences, Sapienza University of Rome, Viale dell’Università 30, 00185 Rome, Italy; (D.M.); (C.P.); (P.M.); (F.F.)
| | - Paolo Missori
- Department of Human Neurosciences, Sapienza University of Rome, Viale dell’Università 30, 00185 Rome, Italy; (D.M.); (C.P.); (P.M.); (F.F.)
| | - Carlo Trompetto
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of Genoa, 16132 Genoa, Italy; (C.T.); (F.C.)
- IRCCS Ospedale Policlinico San Martino, Division of Neurorehabilitation, Department of Neuroscience, 16132 Genoa, Italy
| | - Filippo Cotellessa
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of Genoa, 16132 Genoa, Italy; (C.T.); (F.C.)
| | - Francesco Fattapposta
- Department of Human Neurosciences, Sapienza University of Rome, Viale dell’Università 30, 00185 Rome, Italy; (D.M.); (C.P.); (P.M.); (F.F.)
| | - Antonio Currà
- Academic Neurology Unit, Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome, 04019 Terracina, Italy
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Zhang Y, Chen S, Zhang Z, Duan W, Zhao L, Weinschenk G, Luh WM, Anderson AK, Dai W. Effect of Meditation on Brain Activity during an Attention Task: A Comparison Study of ASL and BOLD Task fMRI. Brain Sci 2023; 13:1653. [PMID: 38137100 PMCID: PMC10741430 DOI: 10.3390/brainsci13121653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 11/21/2023] [Accepted: 11/27/2023] [Indexed: 12/24/2023] Open
Abstract
Focused attention meditation (FAM) training has been shown to improve attention, but the neural basis of FAM on attention has not been thoroughly understood. Here, we aim to investigate the neural effect of a 2-month FAM training on novice meditators in a visual oddball task (a frequently adopted task to evaluate attention), evaluated with both ASL and BOLD fMRI. Using ASL, activation was increased in the middle cingulate (part of the salience network, SN) and temporoparietal (part of the frontoparietal network, FPN) regions; the FAM practice time was negatively associated with the longitudinal changes in activation in the medial prefrontal (part of the default mode network, DMN) and middle frontal (part of the FPN) regions. Using BOLD, the FAM practice time was positively associated with the longitudinal changes of activation in the inferior parietal (part of the dorsal attention network, DAN), dorsolateral prefrontal (part of the FPN), and precentral (part of the DAN) regions. The effect sizes for the activation changes and their association with practice time using ASL are significantly larger than those using BOLD. Our study suggests that FAM training may improve attention via modulation of the DMN, DAN, SN, and FPN, and ASL may be a sensitive tool to study the FAM effect on attention.
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Affiliation(s)
- Yakun Zhang
- Department of Computer Science, State University of New York at Binghamton, Binghamton, NY 13902, USA (S.C.)
| | - Shichun Chen
- Department of Computer Science, State University of New York at Binghamton, Binghamton, NY 13902, USA (S.C.)
| | - Zongpai Zhang
- Department of Computer Science, State University of New York at Binghamton, Binghamton, NY 13902, USA (S.C.)
| | - Wenna Duan
- Department of Computer Science, State University of New York at Binghamton, Binghamton, NY 13902, USA (S.C.)
| | - Li Zhao
- College of Biomedical Engineering & Instrument Science, Zhejiang University, Hangzhou 310027, China
| | - George Weinschenk
- Department of Computer Science, State University of New York at Binghamton, Binghamton, NY 13902, USA (S.C.)
| | - Wen-Ming Luh
- National Institute on Aging, National Institutes of Health, Baltimore, MD 21225, USA
| | - Adam K. Anderson
- Department of Psychology, Cornell University, Ithaca, NY 14853, USA;
| | - Weiying Dai
- Department of Computer Science, State University of New York at Binghamton, Binghamton, NY 13902, USA (S.C.)
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4
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Showkath N, Sinha M, Ghate JR, Agrawal S, Mandal S, Sinha R. EEG-ERP Correlates of Cognitive Dysfunction in Polycystic Ovarian Syndrome. Ann Neurosci 2022; 29:225-232. [PMID: 37064285 PMCID: PMC10101155 DOI: 10.1177/09727531221115318] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 06/28/2022] [Indexed: 11/16/2022] Open
Abstract
Background Polycystic ovarian syndrome (PCOS) has been shown to affect the psychological and cognitive status of a woman. However, amidst various conflicting reports in this regard, very few studies attempted to assess these aspects objectively using electroencephalography (EEG) and event-related potential (ERP). Purpose To assess changes in neurocognitive and psychological parameters of PCOS women without any other comorbidities. Methods PCOS women aged 18 years to 35 years, diagnosed from obstetrics and gynecology OPD who are otherwise free of any other comorbidities, were assessed for psychological status (anxiety and depression using the State-Trait Anxiety Inventory and Beck Depression Inventory, respectively). Thereafter, a cognitive assessment was done subjectively by the Montreal Cognitive Assessment (MoCA) questionnaire and objectively by using EEG [absolute and relative power of alpha, beta, and theta waves along with theta/beta ratios (TBR) and theta/alpha ratio (TAR)] and P300 amplitude and latency of ERP during a visual oddball paradigm task in control ( n = 30) and PCOS ( n = 37) subjects. Results PCOS women showed significantly higher anxiety and depression scores along with low MoCA scores. Significantly reduced absolute alpha, increased frontal beta, and markedly increased theta (relative) power with increased TAR in the PCOS group were seen. Also, a significant reduction in P300 amplitude with prolonged latency during the visual oddball paradigm task was evident in them. Conclusion Reduced alpha and higher theta activity with increased TAR are indicative of poor neural processing ability. Reduced P300 amplitude with more latency also suggests a cognitive decline, which is corroborated by reduced MoCA scores. Our study objectively indicates the presence of subclinical cognitive impairment in PCOS patients even without any comorbidities.
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Affiliation(s)
- Neethu Showkath
- Department of Physiology, Travancore Medical College, Kollam, Kerala, India
| | - Meenakshi Sinha
- Department of Physiology, All India Institute of Medical Sciences, Raipur, Chhattisgarh, India
| | - Jayshri R. Ghate
- Department of Physiology, All India Institute of Medical Sciences, Raipur, Chhattisgarh, India
| | - Sarita Agrawal
- Department of Obstetrics & Gynaecology, All India Institute of Medical Sciences, Raipur, Chhattisgarh, India
| | - Sucharita Mandal
- Department of Psychiatry, All India Institute of Medical Sciences, Kalyani, West Bengal, India
| | - Ramanjan Sinha
- Department of Physiology, All India Institute of Medical Sciences, Raipur, Chhattisgarh, India
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Porcaro C, Vecchio F, Miraglia F, Zito G, Rossini PM. Dynamics of the "Cognitive" Brain Wave P3b at Rest for Alzheimer Dementia Prediction in Mild Cognitive Impairment. Int J Neural Syst 2022; 32:2250022. [PMID: 35435134 DOI: 10.1142/s0129065722500228] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Alzheimer's disease (AD) is the most common cause of dementia that involves a progressive and irrevocable decline in cognitive abilities and social behavior, thus annihilating the patient's autonomy. The theoretical assumption that disease-modifying drugs are most effective in the early stages hopefully in the prodromal stage called mild cognitive impairment (MCI) urgently pushes toward the identification of robust and individualized markers of cognitive decline to establish an early pharmacological intervention. This requires the combination of well-established neural mechanisms and the development of increasingly sensitive methodologies. Among the neurophysiological markers of attention and cognition, one of the sub-components of the 'cognitive brain wave' P300 recordable in an odd-ball paradigm -namely the P3b- is extensively regarded as a sensitive indicator of cognitive performance. Several studies have reliably shown that changes in the amplitude and latency of the P3b are strongly related to cognitive decline and aging both healthy and pathological. Here, we used a P3b spatial filter to enhance the electroencephalographic (EEG) characteristics underlying 175 subjects divided into 135 MCI subjects, 20 elderly controls (EC), and 20 young volunteers (Y). The Y group served to extract the P3b spatial filter from EEG data, which was later applied to the other groups during resting conditions with eyes open and without being asked to perform any task. The group of 135 MCI subjects could be divided into two subgroups at the end of a month follow-up: 75 with stable MCI (MCI-S, not converted to AD), 60 converted to AD (MCI-C). The P3b spatial filter was built by means of a signal processing method called Functional Source Separation (FSS), which increases signal-to-noise ratio by using a weighted sum of all EEG recording channels rather than relying on a single, or a small sub-set, of channels. A clear difference was observed for the P3b dynamics at rest between groups. Moreover, a machine learning approach showed that P3b at rest could correctly distinguish MCI from EC (80.6% accuracy) and MCI-S from MCI-C (74.1% accuracy), with an accuracy as high as 93.8% in discriminating between MCI-C and EC. Finally, a comparison of the Bayes factor revealed that the group differences among MCI-S and MCI-C were 138 times more likely to be detected using the P3b dynamics compared with the best performing single electrode (Pz) approach. In conclusion, we propose that P3b as measured through spatial filters can be safely regarded as a simple and sensitive marker to predict the conversion from an MCI to AD status eventually combined with other non-neurophysiological biomarkers for a more precise definition of dementia having neuropathological Alzheimer characteristics.
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Affiliation(s)
- Camillo Porcaro
- Department of Neuroscience and Padova Neuroscience Center (PNC), University of Padova, Padova, Italy.,Institute of Cognitive Sciences and Technologies, (ISTC) - National Research Council (CNR), Rome, Italy.,Centre for Human Brain Health and School of Psychology, University of Birmingham, Birmingham, UK
| | - Fabrizio Vecchio
- Brain Connectivity Laboratory, Department of Neurosciences & Neurorehabilitation, IRCCS San Raffaele-Roma, Rome, Italy.,Department of Theoretical and Applied Sciences, eCampus University, Novedrate (Como), Italy
| | - Francesca Miraglia
- Department of Theoretical and Applied Sciences, eCampus University, Novedrate (Como), Italy.,Department of Neurology, Neurovascular Treatment Unit, San Camillo de Lellis Hospital, Rieti, Italy
| | - Giancarlo Zito
- Brain Connectivity Laboratory, Department of Neurosciences & Neurorehabilitation, IRCCS San Raffaele-Roma, Rome, Italy.,Department of Neurology, Neurovascular Treatment Unit, San Camillo de Lellis Hospital, Rieti, Italy
| | - Paolo Maria Rossini
- Brain Connectivity Laboratory, Department of Neurosciences & Neurorehabilitation, IRCCS San Raffaele-Roma, Rome, Italy
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Rusiniak M, Bornfleth H, Cho JH, Wolak T, Ille N, Berg P, Scherg M. EEG-fMRI: Ballistocardiogram Artifact Reduction by Surrogate Method for Improved Source Localization. Front Neurosci 2022; 16:842420. [PMID: 35360180 PMCID: PMC8960642 DOI: 10.3389/fnins.2022.842420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 02/16/2022] [Indexed: 11/13/2022] Open
Abstract
For the analysis of simultaneous EEG-fMRI recordings, it is vital to use effective artifact removal tools. This applies in particular to the ballistocardiogram (BCG) artifact which is difficult to remove without distorting signals of interest related to brain activity. Here, we documented the use of surrogate source models to separate the artifact-related signals from brain signals with minimal distortion of the brain activity of interest. The artifact topographies used for surrogate separation were created automatically using principal components analysis (PCA-S) or by manual selection of artifact components utilizing independent components analysis (ICA-S). Using real resting-state data from 55 subjects superimposed with simulated auditory evoked potentials (AEP), both approaches were compared with three established BCG artifact removal methods: Blind Source Separation (BSS), Optimal Basis Set (OBS), and a mixture of both (OBS-ICA). Each method was evaluated for its applicability for ERP and source analysis using the following criteria: the number of events surviving artifact threshold scans, signal-to-noise ratio (SNR), error of source localization, and signal variance explained by the dipolar model. Using these criteria, PCA-S and ICA-S fared best overall, with highly significant differences to the established methods, especially in source localization. The PCA-S approach was also applied to a single subject Berger experiment performed in the MRI scanner. Overall, the removal of BCG artifacts by the surrogate methods provides a substantial improvement for the analysis of simultaneous EEG-fMRI data compared to the established methods.
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Affiliation(s)
- Mateusz Rusiniak
- Research Department, BESA GmbH, Gräfelfing, Germany
- *Correspondence: Mateusz Rusiniak,
| | | | - Jae-Hyun Cho
- Research Department, BESA GmbH, Gräfelfing, Germany
| | - Tomasz Wolak
- Bioimaging Research Center, World Hearing Center of the Institute of Physiology and Pathology of Hearing, Warsaw, Poland
| | - Nicole Ille
- Research Department, BESA GmbH, Gräfelfing, Germany
| | - Patrick Berg
- Research Department, BESA GmbH, Gräfelfing, Germany
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The Neurophysiology of the Cerebellum in Emotion. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2022; 1378:87-108. [DOI: 10.1007/978-3-030-99550-8_7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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8
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Rollins L, Riggins T. Adapting event-related potential research paradigms for children: Considerations from research on the development of recognition memory. Dev Psychobiol 2021; 63:e22159. [PMID: 34333779 DOI: 10.1002/dev.22159] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 05/17/2021] [Accepted: 06/21/2021] [Indexed: 11/10/2022]
Abstract
Most developmental event-related potential (ERP) research uses experimental paradigms modified from research with adults. One major challenge is identifying how to adapt these paradigms effectively for use with younger individuals. This paper provides guidance for developmental adaptations by considering research on the development of recognition memory. We provide a brief overview of recognition memory tasks and ERP components associated with recognition memory in children and adults. Then, we provide some general recommendations, discuss common differences between ERP studies of recognition memory in adults and children (e.g., the type of stimuli presented, response modalities), and provide suggestions for assessing the effect of task modifications on ERP components of interest. Specifically, we recommend (a) testing both children and adults on the modified paradigm to allow for a continuity of findings across development, (b) comparing children of different ages on the modified paradigm based on expectations regarding when developmental change occurs for the cognitive process of interest, and (c) empirically assessing the effect of methodological differences between paradigms. To illustrate the latter, we analyzed data from our lab comparing memory-related ERP components when children experienced a 1-day, 2-day, or 1-week delay between encoding and retrieval.
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Affiliation(s)
- Leslie Rollins
- Department of Psychology, Christopher Newport University, Newport News, Virginia, USA
| | - Tracy Riggins
- Department of Psychology, University of Maryland, College Park, Maryland, USA
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9
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Safety and data quality of EEG recorded simultaneously with multi-band fMRI. PLoS One 2021; 16:e0238485. [PMID: 34214093 PMCID: PMC8253410 DOI: 10.1371/journal.pone.0238485] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 05/04/2021] [Indexed: 11/19/2022] Open
Abstract
PURPOSE Simultaneously recorded electroencephalography and functional magnetic resonance imaging (EEG-fMRI) is highly informative yet technically challenging. Until recently, there has been little information about EEG data quality and safety when used with newer multi-band (MB) fMRI sequences. Here, we measure the relative heating of a MB protocol compared with a standard single-band (SB) protocol considered to be safe. We also evaluated EEG quality recorded concurrently with the MB protocol on humans. MATERIALS AND METHODS We compared radiofrequency (RF)-related heating at multiple electrodes and magnetic field magnitude, B1+RMS, of a MB fMRI sequence with whole-brain coverage (TR = 440 ms, MB factor = 4) against a previously recommended, safe SB sequence using a phantom outfitted with a 64-channel EEG cap. Next, 9 human subjects underwent eyes-closed resting state EEG-fMRI using the MB sequence. Additionally, in three of the subjects resting state EEG was recorded also during the SB sequence and in an fMRI-free condition to directly compare EEG data quality across scanning conditions. EEG data quality was assessed by the ability to remove gradient and cardioballistic artifacts along with a clean spectrogram. RESULTS The heating induced by the MB sequence was lower than that of the SB sequence by a factor of 0.73 ± 0.38. This is consistent with an expected heating ratio of 0.64, calculated from the square of the ratio of B1+RMS values of the sequences. In the resting state EEG data, gradient and cardioballistic artifacts were successfully removed using traditional template subtraction. All subjects showed an individual alpha peak in the spectrogram with a posterior topography characteristic of eyes-closed EEG. The success of artifact rejection for the MB sequence was comparable to that in traditional SB sequences. CONCLUSIONS Our study shows that B1+RMS is a useful indication of the relative heating of fMRI protocols. This observation indicates that simultaneous EEG-fMRI recordings using this MB sequence can be safe in terms of RF-related heating, and that EEG data recorded using this sequence is of acceptable quality after traditional artifact removal techniques.
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10
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Rauer L, Trost S, Petrovic A, Gruber O. Cortical activation abnormalities in bipolar and schizophrenia patients in a combined oddball-incongruence paradigm. Eur Arch Psychiatry Clin Neurosci 2021; 271:1487-1499. [PMID: 32710172 PMCID: PMC8563619 DOI: 10.1007/s00406-020-01168-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Accepted: 07/13/2020] [Indexed: 11/14/2022]
Abstract
Patients with bipolar disorder and schizophrenia often suffer from severe cognitive impairment even during times of remission. This study investigated the pathomechanisms underlying their deficits in cognitive control. A combined oddball-incongruence fMRI task was applied to examine similarities and differences of neural activation patterns between patients and healthy controls. Bipolar and schizophrenia patients demonstrated hyperactivations in the intraparietal cortex during the oddball condition. Furthermore, bipolar patients revealed diagnosis-specific hyperactivation in the left middle frontal gyrus, precentral gyrus, anteroventral prefrontal cortex and orbitofrontal cortex regions compared to schizophrenia patients and healthy individuals. In comparison to healthy controls the patients showed hypoactivations in the inferior frontal junction and ventral pathway during the cognitively more demanding incongruence. Taken together, bipolar patients seem to recruit frontal and parietal areas during the oddball condition to compensate for potential deficits in their attentional network. During more challenging tasks, i.e., the incongruence condition, their compensatory mechanisms seem to collapse leading to hypoactivations in the same frontal areas as well as the ventral pathway.
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Affiliation(s)
- Lisa Rauer
- Section for Experimental Psychopathology and Neuroimaging, Department of General Psychiatry, University Hospital Heidelberg, 69115, Heidelberg, Germany.
| | - Sarah Trost
- grid.411984.10000 0001 0482 5331Department of Psychiatry and Psychotherapy, Center for Translational Research in Systems Neuroscience and Clinical Psychiatry, University Medical Center Göttingen, 37075 Göttingen, Germany
| | - Aleksandra Petrovic
- grid.411984.10000 0001 0482 5331Department of Psychiatry and Psychotherapy, Center for Translational Research in Systems Neuroscience and Clinical Psychiatry, University Medical Center Göttingen, 37075 Göttingen, Germany
| | - Oliver Gruber
- grid.5253.10000 0001 0328 4908Section for Experimental Psychopathology and Neuroimaging, Department of General Psychiatry, University Hospital Heidelberg, 69115 Heidelberg, Germany
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Ferracuti F, Casadei V, Marcantoni I, Iarlori S, Burattini L, Monteriù A, Porcaro C. A functional source separation algorithm to enhance error-related potentials monitoring in noninvasive brain-computer interface. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2020; 191:105419. [PMID: 32151908 DOI: 10.1016/j.cmpb.2020.105419] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 02/11/2020] [Accepted: 02/26/2020] [Indexed: 06/10/2023]
Abstract
BACKGROUND AND OBJECTIVES An Error related Potential (ErrP) can be noninvasively and directly measured from the scalp through electroencephalography (EEG), as response, when a person realizes they are making an error during a task (as a consequence of a cognitive error performed from the user). It has been shown that ErrPs can be automatically detected with time-discrete feedback tasks, which are widely applied in the Brain-Computer Interface (BCI) field for error correction or adaptation. In this work, a semi-supervised algorithm, namely the Functional Source Separation (FSS), is proposed to estimate a spatial filter for learning the ErrPs and to enhance the evoked potentials. METHODS EEG data recorded on six subjects were used to evaluate the proposed method based on FFS algorithm in comparison with the xDAWN algorithm. FSS- and xDAWN-based methods were compared also to the Cz and FCz single channel. Single-trial classification was considered to evaluate the performances of the approaches. (Both the approaches were evaluated on single-trial classification of EEGs.) RESULTS: The results presented using the Bayesian Linear Discriminant Analysis (BLDA) classifier, show that FSS (accuracy 0.92, sensitivity 0.95, specificity 0.81, F1-score 0.95) overcomes the other methods (Cz - accuracy 0.72, sensitivity 0.74, specificity 0.63, F1-score 0.74; FCz - accuracy 0.72, sensitivity 0.75, specificity 0.61, F1-score 0.75; xDAWN - accuracy 0.75, sensitivity 0.79, specificity 0.61, F1-score 0.79) in terms of single-trial classification. CONCLUSIONS The proposed FSS-based method increases the single-trial detection accuracy of ErrPs with respect to both single channel (Cz, FCz) and xDAWN spatial filter.
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Affiliation(s)
- Francesco Ferracuti
- Department of Information Engineering, Università Politecnica delle Marche, Ancona, Italy.
| | - Valentina Casadei
- Department of Electrical Engineering & Electronics, University of Liverpool, Liverpool, United Kingdom.
| | - Ilaria Marcantoni
- Department of Information Engineering, Università Politecnica delle Marche, Ancona, Italy.
| | - Sabrina Iarlori
- Department of Information Engineering, Università Politecnica delle Marche, Ancona, Italy.
| | - Laura Burattini
- Department of Information Engineering, Università Politecnica delle Marche, Ancona, Italy.
| | - Andrea Monteriù
- Department of Information Engineering, Università Politecnica delle Marche, Ancona, Italy.
| | - Camillo Porcaro
- Institute of Cognitive Sciences and Technologies (ISTC) - National Research Council (CNR), Rome, Italy; Department of Information Engineering, Università Politecnica delle Marche, Ancona, Italy; Research Center for Motor Control and Neuroplasticity, KU Leuven, Leuven, Belgium; S. Anna Institute and Research in Advanced Neurorehabilitation (RAN) Crotone, Italy; Centre for Human Brain Health, School of Psychology, University of Birmingham, Birmingham, United Kingdom.
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12
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Ragazzoni A, Di Russo F, Fabbri S, Pesaresi I, Di Rollo A, Perri RL, Barloscio D, Bocci T, Cosottini M, Sartucci F. "Hit the missing stimulus". A simultaneous EEG-fMRI study to localize the generators of endogenous ERPs in an omitted target paradigm. Sci Rep 2019; 9:3684. [PMID: 30842443 PMCID: PMC6403295 DOI: 10.1038/s41598-019-39812-z] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 01/11/2019] [Indexed: 11/09/2022] Open
Abstract
Event-Related Potentials (ERPs) occurring independently from any stimulus are purely endogenous (emitted potentials) and their neural generators can be unequivocally linked with cognitive processes. In the present study, the subjects performed two similar visual counting tasks: a standard two-stimulus oddball, and an omitted-target oddball task, characterized by the physical absence of the target stimulus. Our investigation aimed at localizing the neural sources of the scalp-recorded endogenous/emitted ERPs. To optimize the source localization, the high temporal resolution of electrophysiology was combined with the fine spatial information provided by the simultaneous recording of functional magnetic resonance (fMRI). Both tasks identified two endogenous ERP components in the 300 to 520 ms interval. An earlier component, pP2, showed a bilateral generator in the anterior Insula. A later P3 component (P3b) was generated bilaterally in the temporal-parietal junction, the premotor and motor area and the anterior intraparietal sulcus (this latter one only in the standard oddball). Anticipatory slow waves (beginning 900 to 500 ms pre-stimulus), also of endogenous nature, were produced by the inferior and middle frontal gyrus and the supplementary and cingulate motor areas. Our protocol disentangled pre- from post-stimulus fMRI activations and provided original clues to the psychophysiological interpretation of emitted/endogenous ERPs.
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Affiliation(s)
| | - Francesco Di Russo
- Department of Movement, Human and Health Sciences, University of Rome "Foro Italico", Rome, Italy.
| | - Serena Fabbri
- Neuroradiology Unit, A.O.U.P., Pisa, Italy.,Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
| | | | - Andrea Di Rollo
- Department of Clinical and Experimental Medicine, Unit of Neurophysiopathology, Pisa University Medical School, Pisa, Italy
| | - Rinaldo Livio Perri
- Department of Movement, Human and Health Sciences, University of Rome "Foro Italico", Rome, Italy
| | - Davide Barloscio
- Department of Clinical and Experimental Medicine, Unit of Neurophysiopathology, Pisa University Medical School, Pisa, Italy
| | - Tommaso Bocci
- Department of Clinical and Experimental Medicine, Unit of Neurophysiopathology, Pisa University Medical School, Pisa, Italy.,"Aldo Ravelli" Center for Neurotechnology and Experiental Brain Therapeutics, Department of Health Sciences, University of Milan & ASST Santi Paolo e Carlo, Milan, Italy
| | - Mirco Cosottini
- Neuroradiology Unit, A.O.U.P., Pisa, Italy.,Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy
| | - Ferdinando Sartucci
- Department of Clinical and Experimental Medicine, Unit of Neurophysiopathology, Pisa University Medical School, Pisa, Italy.,CNR, Neuroscience Institute, Pisa, Italy
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13
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Rodríguez-Labrada R, Velázquez-Pérez L, Ortega-Sánchez R, Peña-Acosta A, Vázquez-Mojena Y, Canales-Ochoa N, Medrano-Montero J, Torres-Vega R, González-Zaldivar Y. Insights into cognitive decline in spinocerebellar Ataxia type 2: a P300 event-related brain potential study. CEREBELLUM & ATAXIAS 2019; 6:3. [PMID: 30873287 PMCID: PMC6399884 DOI: 10.1186/s40673-019-0097-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Accepted: 02/21/2019] [Indexed: 12/25/2022]
Abstract
BACKGROUND Cognitive decline is a common non-motor feature characterizing Spinocerebellar Ataxia type 2 (SCA2) during the prodromal stage, nevertheless a reduced number of surrogate biomarkers of these alterations have been described. OBJECTIVE To provide insights into cognitive dysfunction in SCA2 patients using P300 event-related potentials (ERP) and to evaluate these measures as biomarkers of the disease. METHODS A cross-sectional study was performed with 30 SCA2 patients, 20 preclinical carriers and 33 healthy controls, who underwent visual, auditory P300 ERPs, and neurological examinations and ataxia scoring. RESULTS SCA2 patients showed significant increase in P300 latencies and decrease of P300 amplitudes for visual and auditory stimuli, whereas preclinical carriers exhibit a less severe, but significant prolongation of P300 latencies. Multiple regression analyses disclosed a significant effect of SARA score on visual P300 abnormalities in patients as well as of the time to ataxia onset on visual P300 latencies in preclinical carriers. CONCLUSIONS This paper demonstrated the role of P300 ERP for the study of attentional, discriminative and working memory abnormalities in SCA2 patients and for the search of surrogate biomarkers from prodromal to the symptomatic stages. Moreover, our findings provide psychophysiological evidences supporting the cerebellar involvement in cognitive processes and allows us to identify promising outcome measures for future trials focusing on cognitive dysfunction.
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Affiliation(s)
- Roberto Rodríguez-Labrada
- Centre for the Research and Rehabilitation of Hereditary Ataxias, Libertad Street # 26, 80100 Holguín, Cuba
- Faculty of Sport and Physical Culture, University of Holguín, Holguín, Cuba
- Cuban Academy of Science, street no. 460, Habana Vieja, La Habana, Cuba
| | - Luis Velázquez-Pérez
- Centre for the Research and Rehabilitation of Hereditary Ataxias, Libertad Street # 26, 80100 Holguín, Cuba
- Cuban Academy of Science, street no. 460, Habana Vieja, La Habana, Cuba
- Medical University of Holguín, Lenin Avenue 1, Holguín, Cuba
| | - Ricardo Ortega-Sánchez
- Centre for the Research and Rehabilitation of Hereditary Ataxias, Libertad Street # 26, 80100 Holguín, Cuba
| | - Arnoy Peña-Acosta
- Centre for the Research and Rehabilitation of Hereditary Ataxias, Libertad Street # 26, 80100 Holguín, Cuba
| | - Yaimeé Vázquez-Mojena
- Centre for the Research and Rehabilitation of Hereditary Ataxias, Libertad Street # 26, 80100 Holguín, Cuba
- Faculty of Sport and Physical Culture, University of Holguín, Holguín, Cuba
- Cuban Academy of Science, street no. 460, Habana Vieja, La Habana, Cuba
| | - Nalia Canales-Ochoa
- Centre for the Research and Rehabilitation of Hereditary Ataxias, Libertad Street # 26, 80100 Holguín, Cuba
| | - Jacqueline Medrano-Montero
- Centre for the Research and Rehabilitation of Hereditary Ataxias, Libertad Street # 26, 80100 Holguín, Cuba
- Faculty of Sport and Physical Culture, University of Holguín, Holguín, Cuba
| | - Reidenis Torres-Vega
- Centre for the Research and Rehabilitation of Hereditary Ataxias, Libertad Street # 26, 80100 Holguín, Cuba
| | - Yanetza González-Zaldivar
- Centre for the Research and Rehabilitation of Hereditary Ataxias, Libertad Street # 26, 80100 Holguín, Cuba
- Medical University of Holguín, Lenin Avenue 1, Holguín, Cuba
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14
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Porcaro C, Balsters JH, Mantini D, Robertson IH, Wenderoth N. P3b amplitude as a signature of cognitive decline in the older population: An EEG study enhanced by Functional Source Separation. Neuroimage 2019; 184:535-546. [DOI: 10.1016/j.neuroimage.2018.09.057] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 09/03/2018] [Accepted: 09/20/2018] [Indexed: 10/28/2022] Open
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15
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Terrasa JL, Montoya P, González-Roldán AM, Sitges C. Inhibitory Control Impairment on Somatosensory Gating Due to Aging: An Event-Related Potential Study. Front Hum Neurosci 2018; 12:280. [PMID: 30050421 PMCID: PMC6052091 DOI: 10.3389/fnhum.2018.00280] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Accepted: 06/21/2018] [Indexed: 01/19/2023] Open
Abstract
The capacity to suppress irrelevant incoming input, termed sensory gating, is one of the most investigated inhibitory processes associated with cognitive impairments due to aging. The aim of this study was to examine the influence of aging on sensory gating by using somatosensory event-related potentials (ERPs) elicited by repetitive non-painful tactile stimulation (paired-pulsed task). Somatosensory ERPs were recorded in 20 healthy young adults and 20 healthy older adults while they received two identical pneumatic stimuli (S1 and S2) of 100 ms duration with an inter-stimulus interval of 550 ± 50 ms on both forefingers. The difference between the somatosensory ERPs amplitude elicited by S1 and S2 was computed as a sensory gating measure. The amplitude and the latency of P50, N100 and late positive complex (LPC) were analyzed as well as the source generators of the gating effect. Reduced sensory gating was found in older individuals for N100 at frontal and centro-parietal electrodes and for LPC at fronto-central electrodes. Source localization analyses also revealed a reduced current density during gating effect in the older group in frontal areas in N100 and LPC. Moreover, older individuals showed delayed latencies in N100. No significant gating effect differences were found between groups in P50. These findings suggest an age-related slowing of processing speed and a reduced efficiency of inhibitory mechanisms in response to repetitive somatosensory information during stimulus evaluation, and a preservation of processing speed and inhibitory control during early stimulus coding in aging.
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Affiliation(s)
- Juan L Terrasa
- Cognitive and Affective Neuroscience and Clinical Psychology, Research Institute of Health Sciences (IUNICS), Balearic Islands Health Research Institute, University of the Balearic Islands, Palma, Spain
| | - Pedro Montoya
- Cognitive and Affective Neuroscience and Clinical Psychology, Research Institute of Health Sciences (IUNICS), Balearic Islands Health Research Institute, University of the Balearic Islands, Palma, Spain
| | - Ana M González-Roldán
- Cognitive and Affective Neuroscience and Clinical Psychology, Research Institute of Health Sciences (IUNICS), Balearic Islands Health Research Institute, University of the Balearic Islands, Palma, Spain
| | - Carolina Sitges
- Cognitive and Affective Neuroscience and Clinical Psychology, Research Institute of Health Sciences (IUNICS), Balearic Islands Health Research Institute, University of the Balearic Islands, Palma, Spain
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16
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Milner R, Lewandowska M, Ganc M, Włodarczyk E, Grudzień D, Skarżyński H. Abnormal Resting-State Quantitative Electroencephalogram in Children With Central Auditory Processing Disorder: A Pilot Study. Front Neurosci 2018; 12:292. [PMID: 29867312 PMCID: PMC5958225 DOI: 10.3389/fnins.2018.00292] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Accepted: 04/13/2018] [Indexed: 11/25/2022] Open
Abstract
In this study, we showed an abnormal resting-state quantitative electroencephalogram (QEEG) pattern in children with central auditory processing disorder (CAPD). Twenty-seven children (16 male, 11 female; mean age = 10.7 years) with CAPD and no symptoms of other developmental disorders, as well as 23 age- and sex-matched, typically developing children (TDC, 11 male, 13 female; mean age = 11.8 years) underwent examination of central auditory processes (CAPs) and QEEG evaluation consisting of two randomly presented blocks of “Eyes Open” (EO) or “Eyes Closed” (EC) recordings. Significant correlations between individual frequency band powers and CAP tests performance were found. The QEEG studies revealed that in CAPD relative to TDC there was no effect of decreased delta absolute power (1.5–4 Hz) in EO compared to the EC condition. Furthermore, children with CAPD showed increased theta power (4–8 Hz) in the frontal area, a tendency toward elevated theta power in EO block, and reduced low-frequency beta power (12–15 Hz) in the bilateral occipital and the left temporo-occipital regions for both EO and EC conditions. Decreased middle-frequency beta power (15–18 Hz) in children with CAPD was observed only in the EC block. The findings of the present study suggest that QEEG could be an adequate tool to discriminate children with CAPD from normally developing children. Correlation analysis shows relationship between the individual EEG resting frequency bands and the CAPs. Increased power of slow waves and decreased power of fast rhythms could indicate abnormal functioning (hypoarousal of the cortex and/or an immaturity) of brain areas not specialized in auditory information processing.
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Affiliation(s)
- Rafał Milner
- Department of Experimental Audiology, World Hearing Center, Institute of Physiology and Pathology of Hearing, Warsaw, Poland
| | - Monika Lewandowska
- Bioimaging Research Center, World Hearing Center, Institute of Physiology and Pathology of Hearing, Warsaw, Poland.,Faculty of Humanities, Nicolaus Copernicus University, Toruń, Poland
| | - Małgorzata Ganc
- Department of Experimental Audiology, World Hearing Center, Institute of Physiology and Pathology of Hearing, Warsaw, Poland
| | - Elżbieta Włodarczyk
- Audiology and Phoniatrics Clinic, World Hearing Center, Institute of Physiology and Pathology of Hearing, Warsaw, Poland
| | - Diana Grudzień
- Rehabilitation Clinic, World Hearing Center, Institute of Physiology and Pathology of Hearing, Warsaw, Poland
| | - Henryk Skarżyński
- World Hearing Center, Institute of Physiology and Pathology of Hearing, Warsaw, Poland
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17
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Abstract
Attentional blink (AB) refers to the situation where correctly identifying a target impairs the processing of a subsequent probe in a sequence of stimuli. Although the AB often coincides with a modulation of scalp-recorded cognitive event-related potentials (ERPs), the neural sources of this effect remain unclear. In two separate experiments, we used classical LORETA analysis recursively applied (CLARA) to estimate the neural sources of ERPs elicited by an auditory probe when it immediately followed an auditory target (i.e., AB condition), when no auditory target was present (i.e., no-AB condition), and when the probe followed an auditory target but occurred outside of the AB time window (i.e., no-AB condition). We observed a processing deficit when the probe immediately followed the target, and this auditory AB was accompanied by reduced P3b amplitude. Contrasting brain electrical source activity from the AB and no-AB conditions revealed reduced source activity in the medial temporal region as well as in the temporoparietal junction (extending into inferior parietal lobe), ventromedial prefrontal cortex, left anterior thalamic nuclei, mammillary body, and left cerebellum. The results indicate that successful probe identification following a target relies on a widely distributed brain network and further support the suggestion that the auditory AB reflects the failure of the probe to reach short-term consolidation. NEW & NOTEWORTHY Within a rapid succession of auditory stimuli, the perception of a predefined target sound often impedes listeners' ability to detect another target sound that is presented close in succession. This attentional blink may be related to activity in brain areas supporting attention and memory. We show that the auditory attentional blink is associated with brain activity changes in a network including the medial temporal lobe, parietal cortex, and prefrontal cortex. This study suggests that a problem in the interaction between attention and memory underlies the auditory attentional blink.
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Affiliation(s)
- Dawei Shen
- Rotman Research Institute, Baycrest Centre for Geriatric Care , Toronto, Ontario , Canada
| | - Dominique T Vuvan
- Department of Psychology, Skidmore College , Saratoga Springs, New York
| | - Claude Alain
- Rotman Research Institute, Baycrest Centre for Geriatric Care , Toronto, Ontario , Canada.,Department of Psychology, University of Toronto , Toronto, Ontario , Canada.,Institute of Medical Sciences, University of Toronto , Toronto, Ontario , Canada
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18
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Rusiniak M, Wróbel A, Cieśla K, Pluta A, Lewandowska M, Wójcik J, Skarżyński PH, Wolak T. The relationship between alpha burst activity and the default mode network. Acta Neurobiol Exp (Wars) 2018. [DOI: 10.21307/ane-2018-010] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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19
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Tonotopic organisation of the auditory cortex in sloping sensorineural hearing loss. Hear Res 2017; 355:81-96. [DOI: 10.1016/j.heares.2017.09.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Revised: 07/28/2017] [Accepted: 09/23/2017] [Indexed: 01/09/2023]
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20
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Adamaszek M, D'Agata F, Ferrucci R, Habas C, Keulen S, Kirkby KC, Leggio M, Mariën P, Molinari M, Moulton E, Orsi L, Van Overwalle F, Papadelis C, Priori A, Sacchetti B, Schutter DJ, Styliadis C, Verhoeven J. Consensus Paper: Cerebellum and Emotion. THE CEREBELLUM 2017; 16:552-576. [PMID: 27485952 DOI: 10.1007/s12311-016-0815-8] [Citation(s) in RCA: 328] [Impact Index Per Article: 46.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Over the past three decades, insights into the role of the cerebellum in emotional processing have substantially increased. Indeed, methodological refinements in cerebellar lesion studies and major technological advancements in the field of neuroscience are in particular responsible to an exponential growth of knowledge on the topic. It is timely to review the available data and to critically evaluate the current status of the role of the cerebellum in emotion and related domains. The main aim of this article is to present an overview of current facts and ongoing debates relating to clinical, neuroimaging, and neurophysiological findings on the role of the cerebellum in key aspects of emotion. Experts in the field of cerebellar research discuss the range of cerebellar contributions to emotion in nine topics. Topics include the role of the cerebellum in perception and recognition, forwarding and encoding of emotional information, and the experience and regulation of emotional states in relation to motor, cognitive, and social behaviors. In addition, perspectives including cerebellar involvement in emotional learning, pain, emotional aspects of speech, and neuropsychiatric aspects of the cerebellum in mood disorders are briefly discussed. Results of this consensus paper illustrate how theory and empirical research have converged to produce a composite picture of brain topography, physiology, and function that establishes the role of the cerebellum in many aspects of emotional processing.
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Affiliation(s)
- M Adamaszek
- Department of Clinical and Cognitive Neurorehabilitation, Klinik Bavaria Kreischa, An der Wolfsschlucht, 01731, Kreischa, Germany.
| | - F D'Agata
- Department of Neuroscience, University of Turin, Turin, Italy
| | - R Ferrucci
- Fondazione IRCCS Ca' Granda, Granada, Italy
- Università degli Studi di Milano, Milan, Italy
| | - C Habas
- Service de NeuroImagerie (NeuroImaging department) Centre Hospitalier national D'Ophtalmologie des 15/20, Paris, France
| | - S Keulen
- Department of Clinical and Experimental Neurolinguistics, CLIEN, Vrije Universiteit Brussel, Brussels, Belgium
- Center for Language and Cognition Groningen, Rijksuniversiteit Groningen, Groningen, The Netherlands
| | - K C Kirkby
- Psychiatry, School of Medicine, University of Tasmania, Hobart, Australia
| | - M Leggio
- I.R.C.C.S. Santa Lucia Foundation, Rome, Italy
- Department of Psychology, Sapienza University of Rome, Rome, Italy
| | - P Mariën
- Department of Clinical and Experimental Neurolinguistics, CLIEN, Vrije Universiteit Brussel, Brussels, Belgium
- Department of Neurology and Memory Clinic, ZNA Middelheim Hospital, Antwerp, Belgium
| | - M Molinari
- I.R.C.C.S. Santa Lucia Foundation, Rome, Italy
| | - E Moulton
- P.A.I.N. Group, Center for Pain and the Brain, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - L Orsi
- Neurologic Division 1, Department of Neuroscience and Mental Health, Città della Salute e della Scienza di Torino, Turin, Italy
| | - F Van Overwalle
- Faculty of Psychology and Educational Sciences, Vrije Universiteit Brussel, Brussels, Belgium
| | - C Papadelis
- Fetal-Neonatal Neuroimaging and Developmental Center, Boston Children's Hospital, Boston, MA, USA
- Division of Newborn Medicine, Department of Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - A Priori
- Fondazione IRCCS Ca' Granda, Granada, Italy
- Università degli Studi di Milano, Milan, Italy
- III Clinica Neurologica, Polo Ospedaliero San Paolo, San Paolo, Italy
| | - B Sacchetti
- Department of Neuroscience, Section of Physiology, University of Turin, Torino, Italy
| | - D J Schutter
- Donders Institute for Brain, Cognition and Behaviour, Radboud University Nijmegen, Nijmegen, The Netherlands
| | - C Styliadis
- Medical School, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - J Verhoeven
- Department of Language and Communication Science, City University, London, UK
- Computational Linguistics and Psycholinguistics Research Center (CLIPS), Universiteit Antwerpen, Antwerp, Belgium
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21
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Gu LH, Chen J, Gao LJ, Shu H, Wang Z, Liu D, Yan YN, Li SJ, Zhang ZJ. The Effect of Apolipoprotein E ε4 (APOE ε4) on Visuospatial Working Memory in Healthy Elderly and Amnestic Mild Cognitive Impairment Patients: An Event-Related Potentials Study. Front Aging Neurosci 2017; 9:145. [PMID: 28567013 PMCID: PMC5434145 DOI: 10.3389/fnagi.2017.00145] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Accepted: 04/30/2017] [Indexed: 12/17/2022] Open
Abstract
Background: Apolipoprotein E (APOE) ε4 is the only established risk gene for late-onset, sporadic Alzheimer’s disease (AD). Previous studies have provided inconsistent evidence for the effect of APOE ε4 status on the visuospatial working memory (VSWM). Objective: The aim was to investigate the effect of APOE ε4 on VSWM with an event-related potential (ERP) study in healthy controls (HC) and amnestic mild cognitive impairment (aMCI) patients. Methods: The study recorded 39 aMCI patients (27 APOE ε4 non-carriers and 12 APOE ε4 carriers) and their 43 matched controls (25 APOE ε4 non-carriers and 18 APOE ε4 carriers) with an 64-channel electroencephalogram. Participants performed an N-back task, a VSWM paradigm that manipulated the number of items to be stored in memory. Results: The present study detected reduced accuracy and delayed mean correct response time (RT) in aMCI patients compared to HC. P300, a positive component that peaks between 300 and 500 ms, was elicited by the VSWM task. In addition, aMCI patients showed decreased P300 amplitude at the central–parietal (CP1, CPz, and CP2) and parietal (P1, Pz, and P2) electrodes in 0- and 1-back task compared to HC. In both HC and aMCI patients, APOE ε4 carriers showed reduced P300 amplitude with respect to non-carriers, whereas no significant differences in accuracy or RT were detected between APOE ε4 carriers and non-carriers. Additionally, standardized low-resolution brain electromagnetic tomography analysis (s-LORETA) showed enhanced brain activation in the right parahippocampal gyrus (PHG) during P300 time range in APOE ε4 carriers with respect to non-carriers in aMCI patients. Conclusion: It demonstrated that P300 amplitude could predict VSWM deficits in aMCI patients and contribute to early detection of VSWM deficits in APOE ε4 carriers.
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Affiliation(s)
- Li-Hua Gu
- Department of Neurology, Affiliated ZhongDa Hospital, School of Medicine, Southeast UniversityNanjing, China
| | - Jiu Chen
- Department of Neurology, Affiliated ZhongDa Hospital, School of Medicine, Southeast UniversityNanjing, China
| | - Li-Juan Gao
- Department of Neurology, Affiliated ZhongDa Hospital, School of Medicine, Southeast UniversityNanjing, China
| | - Hao Shu
- Department of Neurology, Affiliated ZhongDa Hospital, School of Medicine, Southeast UniversityNanjing, China
| | - Zan Wang
- Department of Neurology, Affiliated ZhongDa Hospital, School of Medicine, Southeast UniversityNanjing, China
| | - Duan Liu
- Department of Neurology, Affiliated ZhongDa Hospital, School of Medicine, Southeast UniversityNanjing, China
| | - Yan-Na Yan
- Department of Psychology, Xinxiang Medical UniversityXinxiang, China
| | - Shi-Jiang Li
- Department of Biophysics, Medical College of Wisconsin, MilwaukeeWI, United States
| | - Zhi-Jun Zhang
- Department of Neurology, Affiliated ZhongDa Hospital, School of Medicine, Southeast UniversityNanjing, China.,Department of Psychology, Xinxiang Medical UniversityXinxiang, China
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22
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Zhang Q, Yang X, Yao L, Zhao X. Working memory load-dependent spatio-temporal activity of single-trial P3 response detected with an adaptive wavelet denoiser. Neuroscience 2017; 346:64-73. [PMID: 28108257 DOI: 10.1016/j.neuroscience.2017.01.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 12/19/2016] [Accepted: 01/08/2017] [Indexed: 10/20/2022]
Abstract
Working memory (WM) refers to the holding and manipulation of information during cognitive tasks. Its underlying neural mechanisms have been explored through both functional magnetic resonance imaging (fMRI) and electroencephalography (EEG). Trial-by-trial coupling of simultaneously collected EEG and fMRI signals has become an important and promising approach to study the spatio-temporal dynamics of such cognitive processes. Previous studies have demonstrated a modulation effect of the WM load on both the BOLD response in certain brain areas and the amplitude of P3. However, much remains to be explored regarding the WM load-dependent relationship between the amplitude of ERP components and cortical activities, and the low signal-to-noise ratio (SNR) of the EEG signal still poses a challenge to performing single-trial analyses. In this paper, we investigated the spatio-temporal activities of P3 during an n-back verbal WM task by introducing an adaptive wavelet denoiser into the extraction of single-trial P3 features and using general linear model (GLM) to integrate simultaneously collected EEG and fMRI data. Our results replicated the modulation effect of the WM load on the P3 amplitude. Additionally, the activation of single-trial P3 amplitudes was detected in multiple brain regions, including the insula, the cuneus, the lingual gyrus (LG), and the middle occipital gyrus (MOG). Moreover, we found significant correlations between P3 features and behavioral performance. These findings suggest that the single-trial integration of simultaneous EEG and fMRI signals may provide new insights into classical cognitive functions.
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Affiliation(s)
- Qiushi Zhang
- College of Information Science and Technology, Beijing Normal University, Beijing 100875, China; Department of Computer Science, University of Texas at Dallas, Richardson, TX, USA
| | - Xueqian Yang
- College of Information Science and Technology, Beijing Normal University, Beijing 100875, China
| | - Li Yao
- College of Information Science and Technology, Beijing Normal University, Beijing 100875, China; State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing 100875, China
| | - Xiaojie Zhao
- College of Information Science and Technology, Beijing Normal University, Beijing 100875, China.
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23
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Chun J, Peltier SJ, Yoon D, Manschreck TC, Deldin PJ. Prolongation of ERP latency and reaction time (RT) in simultaneous EEG/fMRI data acquisition. J Neurosci Methods 2016; 268:78-86. [PMID: 27172845 DOI: 10.1016/j.jneumeth.2016.05.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 05/06/2016] [Accepted: 05/06/2016] [Indexed: 10/21/2022]
Abstract
BACKGROUND Recording EEG and fMRI data simultaneously inside a fully-operating scanner has been recognized as a novel approach in human brain research. Studies have demonstrated high concordance between the EEG signals and hemodynamic response. However, a few studies reported altered cognitive process inside the fMRI scanner such as delayed reaction time (RT) and reduced and/or delayed N100 and P300 event-related brain potential (ERP) components. NEW METHOD The present study investigated the influence of electromagnetic field (static magnetic field, radio frequency (RF) pulse, and gradient switching) and experimental environment on posterior N100 and P300 ERP components in four different settings with six healthy subjects using a visual oddball task: (1) classic fMRI acquisition inside the scanner (e.g., supine position, mirror glasses for stimulus presentation), (2) standard behavioral experiment outside the scanner (e.g., seated position, keyboard response), (3) controlled fMRI acquisition inside the scanner (e.g., organic light-emitting diode (OLED) goggles for stimulus presentation) inside; and (4) modified behavioral experiment outside the scanner (e.g., supine position, OLED goggles). RESULTS The study findings indicated that the experimental environment in simultaneous EEG/fMRI acquisition could substantially delay N1P, P300 latency, and RT inside the scanner, and was associated with a reduced N1P amplitude. COMPARISON WITH EXISTING METHODS There was no effect of electromagnetic field in the prolongation of RT, N1P and P300 latency inside the scanner. N1P, but not P300, latency was sensitive to stimulus presentation method inside the scanner. CONCLUSION Future simultaneous EEG/fMRI data collection should consider experimental environment in both design and analysis.
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Affiliation(s)
- Jinsoo Chun
- Commonwealth Research Center, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States; Laboratory for Clinical and Experimental Psychopathology, Beth Israel Deaconess Medical Center and Harvard Medical School, Fall River, MA, United States.
| | - Scott J Peltier
- Functional MRI Laboratory, The University of Michigan, Ann Arbor, MI, United States.
| | - Daehyun Yoon
- Radiological Sciences Laboratory, Stanford University, Palo Alto, CA, United States.
| | - Theo C Manschreck
- Commonwealth Research Center, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States; Laboratory for Clinical and Experimental Psychopathology, Beth Israel Deaconess Medical Center and Harvard Medical School, Fall River, MA, United States.
| | - Patricia J Deldin
- Department of Psychology & Psychiatry, The University of Michigan, Ann Arbor, MI, United States.
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Gabriel D, Wong TC, Nicolier M, Giustiniani J, Mignot C, Noiret N, Monnin J, Magnin E, Pazart L, Moulin T, Haffen E, Vandel P. Don't forget the lyrics! Spatiotemporal dynamics of neural mechanisms spontaneously evoked by gaps of silence in familiar and newly learned songs. Neurobiol Learn Mem 2016; 132:18-28. [PMID: 27131744 DOI: 10.1016/j.nlm.2016.04.011] [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: 10/06/2015] [Revised: 04/18/2016] [Accepted: 04/24/2016] [Indexed: 10/21/2022]
Abstract
The vast majority of people experience musical imagery, the sensation of reliving a song in absence of any external stimulation. Internal perception of a song can be deliberate and effortful, but also may occur involuntarily and spontaneously. Moreover, musical imagery is also involuntarily used for automatically completing missing parts of music or lyrics from a familiar song. The aim of our study was to explore the onset of musical imagery dynamics that leads to the automatic completion of missing lyrics. High-density electroencephalography was used to record the cerebral activity of twenty healthy volunteers while they were passively listening to unfamiliar songs, very familiar songs, and songs previously listened to for two weeks. Silent gaps inserted into these songs elicited a series of neural activations encompassing perceptual, attentional and cognitive mechanisms (range 100-500ms). Familiarity and learning effects emerged as early as 100ms and lasted 400ms after silence occurred. Although participants reported more easily mentally imagining lyrics in familiar rather than passively learnt songs, the onset of neural mechanisms and the power spectrum underlying musical imagery were similar for both types of songs. This study offers new insights into the musical imagery dynamics evoked by gaps of silence and on the role of familiarity and learning processes in the generation of these dynamics. The automatic and effortless method presented here is a potentially useful tool to understand failure in the familiarity and learning processes of pathological populations.
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Affiliation(s)
- Damien Gabriel
- Centre d'investigation Clinique-Innovation Technologique CIC-IT 1431, Inserm, CHRU Besançon, F-25000 Besançon, France; Neurosciences intégratives et cliniques EA 481, Univ. Franche-Comté, Univ. Bourgogne Franche-Comté, F-25000 Besançon, France.
| | - Thian Chiew Wong
- Centre d'investigation Clinique-Innovation Technologique CIC-IT 1431, Inserm, CHRU Besançon, F-25000 Besançon, France
| | - Magali Nicolier
- Centre d'investigation Clinique-Innovation Technologique CIC-IT 1431, Inserm, CHRU Besançon, F-25000 Besançon, France; Neurosciences intégratives et cliniques EA 481, Univ. Franche-Comté, Univ. Bourgogne Franche-Comté, F-25000 Besançon, France; Service de psychiatrie de l'adulte, CHRU Besançon, F-25000 Besançon, France
| | - Julie Giustiniani
- Service de psychiatrie de l'adulte, CHRU Besançon, F-25000 Besançon, France
| | - Coralie Mignot
- Centre d'investigation Clinique-Innovation Technologique CIC-IT 1431, Inserm, CHRU Besançon, F-25000 Besançon, France
| | - Nicolas Noiret
- Centre Mémoire de Ressource et de Recherche de Franche-Comté, CHRU Besançon, F-25000 Besançon, France; Laboratoire de psychologie EA 3188, Université de Franche-Comté, Besançon, France
| | - Julie Monnin
- Centre d'investigation Clinique-Innovation Technologique CIC-IT 1431, Inserm, CHRU Besançon, F-25000 Besançon, France; Neurosciences intégratives et cliniques EA 481, Univ. Franche-Comté, Univ. Bourgogne Franche-Comté, F-25000 Besançon, France; Service de psychiatrie de l'adulte, CHRU Besançon, F-25000 Besançon, France
| | - Eloi Magnin
- Centre Mémoire de Ressource et de Recherche de Franche-Comté, CHRU Besançon, F-25000 Besançon, France; Service de neurologie, CHRU Besançon, F-25000 Besançon, France
| | - Lionel Pazart
- Centre d'investigation Clinique-Innovation Technologique CIC-IT 1431, Inserm, CHRU Besançon, F-25000 Besançon, France; Neurosciences intégratives et cliniques EA 481, Univ. Franche-Comté, Univ. Bourgogne Franche-Comté, F-25000 Besançon, France
| | - Thierry Moulin
- Centre d'investigation Clinique-Innovation Technologique CIC-IT 1431, Inserm, CHRU Besançon, F-25000 Besançon, France; Neurosciences intégratives et cliniques EA 481, Univ. Franche-Comté, Univ. Bourgogne Franche-Comté, F-25000 Besançon, France; Service de neurologie, CHRU Besançon, F-25000 Besançon, France
| | - Emmanuel Haffen
- Centre d'investigation Clinique-Innovation Technologique CIC-IT 1431, Inserm, CHRU Besançon, F-25000 Besançon, France; Neurosciences intégratives et cliniques EA 481, Univ. Franche-Comté, Univ. Bourgogne Franche-Comté, F-25000 Besançon, France; Service de psychiatrie de l'adulte, CHRU Besançon, F-25000 Besançon, France
| | - Pierre Vandel
- Centre d'investigation Clinique-Innovation Technologique CIC-IT 1431, Inserm, CHRU Besançon, F-25000 Besançon, France; Neurosciences intégratives et cliniques EA 481, Univ. Franche-Comté, Univ. Bourgogne Franche-Comté, F-25000 Besançon, France; Service de psychiatrie de l'adulte, CHRU Besançon, F-25000 Besançon, France; Centre Mémoire de Ressource et de Recherche de Franche-Comté, CHRU Besançon, F-25000 Besançon, France
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Ahmad RF, Malik AS, Kamel N, Reza F, Abdullah JM. Simultaneous EEG-fMRI for working memory of the human brain. AUSTRALASIAN PHYSICAL & ENGINEERING SCIENCES IN MEDICINE 2016; 39:363-78. [PMID: 27043850 DOI: 10.1007/s13246-016-0438-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Accepted: 03/14/2016] [Indexed: 02/06/2023]
Abstract
Memory plays an important role in human life. Memory can be divided into two categories, i.e., long term memory and short term memory (STM). STM or working memory (WM) stores information for a short span of time and it is used for information manipulations and fast response activities. WM is generally involved in the higher cognitive functions of the brain. Different studies have been carried out by researchers to understand the WM process. Most of these studies were based on neuroimaging modalities like fMRI, EEG, MEG etc., which use standalone processes. Each neuroimaging modality has some pros and cons. For example, EEG gives high temporal resolution but poor spatial resolution. On the other hand, the fMRI results have a high spatial resolution but poor temporal resolution. For a more in depth understanding and insight of what is happening inside the human brain during the WM process or during cognitive tasks, high spatial as well as high temporal resolution is desirable. Over the past decade, researchers have been working to combine different modalities to achieve a high spatial and temporal resolution at the same time. Developments of MRI compatible EEG equipment in recent times have enabled researchers to combine EEG-fMRI successfully. The research publications in simultaneous EEG-fMRI have been increasing tremendously. This review is focused on the WM research involving simultaneous EEG-fMRI data acquisition and analysis. We have covered the simultaneous EEG-fMRI application in WM and data processing. Also, it adds to potential fusion methods which can be used for simultaneous EEG-fMRI for WM and cognitive tasks.
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Affiliation(s)
- Rana Fayyaz Ahmad
- Centre for Intelligent Signal and Imaging Research (CISIR), Tronoh, Malaysia. .,Department of Electrical and Electronic Engineering, Universiti Teknologi PETRONAS, 32610, Bandar Seri Iskandar, Perak, Malaysia.
| | - Aamir Saeed Malik
- Centre for Intelligent Signal and Imaging Research (CISIR), Tronoh, Malaysia. .,Department of Electrical and Electronic Engineering, Universiti Teknologi PETRONAS, 32610, Bandar Seri Iskandar, Perak, Malaysia.
| | - Nidal Kamel
- Centre for Intelligent Signal and Imaging Research (CISIR), Tronoh, Malaysia.,Department of Electrical and Electronic Engineering, Universiti Teknologi PETRONAS, 32610, Bandar Seri Iskandar, Perak, Malaysia
| | - Faruque Reza
- Department of Neurosciences, Universiti Sains Malaysia, Kubang Kerian, 16150, Kota Bharu, Kelantan, Malaysia.,Centre for Neuroscience Services and Research, Universiti Sains Malaysia, Kubang Kerian, 16150, Kota Bharu, Kelantan, Malaysia
| | - Jafri Malin Abdullah
- Department of Neurosciences, Universiti Sains Malaysia, Kubang Kerian, 16150, Kota Bharu, Kelantan, Malaysia.,Centre for Neuroscience Services and Research, Universiti Sains Malaysia, Kubang Kerian, 16150, Kota Bharu, Kelantan, Malaysia
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Mannarelli D, Pauletti C, De Lucia MC, Delle Chiaie R, Bersani FS, Spagnoli F, Minichino A, Currà A, Trompetto C, Fattapposta F. Effects of cerebellar transcranial direct current stimulation on attentional processing of the stimulus: Evidence from an event-related potentials study. Neuropsychologia 2016; 84:127-35. [DOI: 10.1016/j.neuropsychologia.2016.02.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 02/07/2016] [Accepted: 02/08/2016] [Indexed: 01/08/2023]
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27
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Ehlers MR, López Herrero C, Kastrup A, Hildebrandt H. The P300 in middle cerebral artery strokes or hemorrhages: Outcome predictions and source localization. Clin Neurophysiol 2015; 126:1532-8. [DOI: 10.1016/j.clinph.2014.10.151] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Revised: 09/23/2014] [Accepted: 10/26/2014] [Indexed: 10/24/2022]
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28
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Mannarelli D, Pauletti C, De Lucia MC, Currà A, Fattapposta F. Insights from ERPs into attention during recovery after cerebellar stroke: a case report. Neurocase 2015; 21:721-6. [PMID: 25372555 DOI: 10.1080/13554794.2014.977922] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The role of the cerebellum in cognitive performance and attentional processes is a focus of research in recent years. We investigated the P300 component in a patient with a left posterior cerebellar ischemic stroke during both the acute phase and over 4 weeks of follow-up. After stroke, auditory event-related potentials showed a reduction in P3 amplitude, which appears to improve instead after 4 weeks of follow-up. These event-related potential findings could suggest a specific neural pattern of disruption in selective attention during the discrimination processes of the stimulus following a posterior cerebellar lesion. A recovery is observed in the long term.
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Affiliation(s)
- Daniela Mannarelli
- a Department of Neurology and Psychiatry , Sapienza University of Rome , Rome , Italy
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29
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Milner R, Rusiniak M, Lewandowska M, Wolak T, Ganc M, Piątkowska-Janko E, Bogorodzki P, Skarżyński H. Towards neural correlates of auditory stimulus processing: a simultaneous auditory evoked potentials and functional magnetic resonance study using an odd-ball paradigm. Med Sci Monit 2014; 20:35-46. [PMID: 24413019 PMCID: PMC3894920 DOI: 10.12659/msm.889712] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Background The neural underpinnings of auditory information processing have often been investigated using the odd-ball paradigm, in which infrequent sounds (deviants) are presented within a regular train of frequent stimuli (standards). Traditionally, this paradigm has been applied using either high temporal resolution (EEG) or high spatial resolution (fMRI, PET). However, used separately, these techniques cannot provide information on both the location and time course of particular neural processes. The goal of this study was to investigate the neural correlates of auditory processes with a fine spatio-temporal resolution. A simultaneous auditory evoked potentials (AEP) and functional magnetic resonance imaging (fMRI) technique (AEP-fMRI), together with an odd-ball paradigm, were used. Material/Methods Six healthy volunteers, aged 20–35 years, participated in an odd-ball simultaneous AEP-fMRI experiment. AEP in response to acoustic stimuli were used to model bioelectric intracerebral generators, and electrophysiological results were integrated with fMRI data. Results fMRI activation evoked by standard stimuli was found to occur mainly in the primary auditory cortex. Activity in these regions overlapped with intracerebral bioelectric sources (dipoles) of the N1 component. Dipoles of the N1/P2 complex in response to standard stimuli were also found in the auditory pathway between the thalamus and the auditory cortex. Deviant stimuli induced fMRI activity in the anterior cingulate gyrus, insula, and parietal lobes. Conclusions The present study showed that neural processes evoked by standard stimuli occur predominantly in subcortical and cortical structures of the auditory pathway. Deviants activate areas non-specific for auditory information processing.
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Affiliation(s)
- Rafał Milner
- World Hearing Center, Institute of Physiology and Pathology of Hearing, Warsaw/Kajetany, Poland
| | - Mateusz Rusiniak
- World Hearing Center, Institute of Physiology and Pathology of Hearing, Warsaw/Kajetany, Poland
| | - Monika Lewandowska
- World Hearing Center, Institute of Physiology and Pathology of Hearing, Warsaw/Kajetany, Poland
| | - Tomasz Wolak
- World Hearing Center, Institute of Physiology and Pathology of Hearing, Warsaw/Kajetany, Poland
| | - Małgorzata Ganc
- World Hearing Center, Institute of Physiology and Pathology of Hearing, Warsaw/Kajetany, Poland
| | - Ewa Piątkowska-Janko
- Nuclear and Medical Electronics Division, Institute of Radioelectronics, Warsaw, Poland
| | - Piotr Bogorodzki
- Nuclear and Medical Electronics Division, Institute of Radioelectronics, Warsaw, Poland
| | - Henryk Skarżyński
- World Hearing Center, Institute of Physiology and Pathology of Hearing, Warsaw/Kajetany, Poland
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