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Taberna GA, Samogin J, Zhao M, Marino M, Guarnieri R, Cuartas Morales E, Ganzetti M, Liu Q, Mantini D. Large-scale analysis of neural activity and connectivity from high-density electroencephalographic data. Comput Biol Med 2024; 178:108704. [PMID: 38852398 DOI: 10.1016/j.compbiomed.2024.108704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 05/28/2024] [Accepted: 06/01/2024] [Indexed: 06/11/2024]
Abstract
INTRODUCTION High-density electroencephalography (hdEEG) is a technique used for the characterization of the neural activity and connectivity in the human brain. The analysis of EEG data involves several steps, including signal pre-processing, head modelling, source localization and activity/connectivity quantification. Visual check of the analysis steps is often necessary, making the process time- and resource-consuming and, therefore, not feasible for large datasets. FINDINGS Here we present the Noninvasive Electrophysiology Toolbox (NET), an open-source software for large-scale analysis of hdEEG data, running on the cross-platform MATLAB environment. NET combines all the tools required for a complete hdEEG analysis workflow, from raw signals to final measured values. By relying on reconstructed neural signals in the brain, NET can perform traditional analyses of time-locked neural responses, as well as more advanced functional connectivity and brain mapping analyses. The extracted quantitative neural data can be exported to provide broad compatibility with other software. CONCLUSIONS NET is freely available (https://github.com/bind-group-kul/net) under the GNU public license for non-commercial use and open-source development, together with a graphical user interface (GUI) and a user tutorial. While NET can be used interactively with the GUI, it is primarily aimed at unsupervised automation to process large hdEEG datasets efficiently. Its implementation creates indeed a highly customizable program suitable for analysis automation and tight integration into existing workflows.
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Affiliation(s)
- Gaia Amaranta Taberna
- Movement Control and Neuroplasticity Research Group, KU Leuven, 3001, Leuven, Belgium
| | - Jessica Samogin
- Movement Control and Neuroplasticity Research Group, KU Leuven, 3001, Leuven, Belgium
| | - Mingqi Zhao
- Movement Control and Neuroplasticity Research Group, KU Leuven, 3001, Leuven, Belgium; Gansu Provincial Key Laboratory of Wearable Computing, School of Information Science and Engineering, Lanzhou University, 730000, Lanzhou, PR China
| | - Marco Marino
- Movement Control and Neuroplasticity Research Group, KU Leuven, 3001, Leuven, Belgium; Department of General Psychology, University of Padova, 35131, Padova, Italy
| | - Roberto Guarnieri
- Movement Control and Neuroplasticity Research Group, KU Leuven, 3001, Leuven, Belgium
| | - Ernesto Cuartas Morales
- Movement Control and Neuroplasticity Research Group, KU Leuven, 3001, Leuven, Belgium; Dirección Académica, Universidad Nacional de Colombia, Sede de La Paz, La Paz, 202017, Colombia
| | - Marco Ganzetti
- Movement Control and Neuroplasticity Research Group, KU Leuven, 3001, Leuven, Belgium; Roche Pharma Research and Early Development (pRED), pRED Data & Analytics, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, 4070, Basel, Switzerland
| | - Quanying Liu
- Movement Control and Neuroplasticity Research Group, KU Leuven, 3001, Leuven, Belgium; Department of Biomedical Engineering, Southern University of Science and Technology, 518055, Shenzhen, PR China
| | - Dante Mantini
- Movement Control and Neuroplasticity Research Group, KU Leuven, 3001, Leuven, Belgium; KU Leuven Brain Institute, KU Leuven, 3000, Leuven, Belgium.
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Alexander KE, Estepp JR, Elbasiouny SM. Adaptive Filtering with Fitted Noise Estimate (AFFiNE): Blink Artifact Correction in Simulated and Real P300 Data. Bioengineering (Basel) 2024; 11:707. [PMID: 39061789 PMCID: PMC11273512 DOI: 10.3390/bioengineering11070707] [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: 05/16/2024] [Revised: 07/07/2024] [Accepted: 07/08/2024] [Indexed: 07/28/2024] Open
Abstract
(1) Background: The electroencephalogram (EEG) is frequently corrupted by ocular artifacts such as saccades and blinks. Methods for correcting these artifacts include independent component analysis (ICA) and recursive-least-squares (RLS) adaptive filtering (-AF). Here, we introduce a new method, AFFiNE, that applies Bayesian adaptive regression spline (BARS) fitting to the adaptive filter's reference noise input to address the known limitations of both ICA and RLS-AF, and then compare the performance of all three methods. (2) Methods: Artifact-corrected P300 morphologies, topographies, and measurements were compared between the three methods, and to known truth conditions, where possible, using real and simulated blink-corrupted event-related potential (ERP) datasets. (3) Results: In both simulated and real datasets, AFFiNE was successful at removing the blink artifact while preserving the underlying P300 signal in all situations where RLS-AF failed. Compared to ICA, AFFiNE resulted in either a practically or an observably comparable error. (4) Conclusions: AFFiNE is an ocular artifact correction technique that is implementable in online analyses; it can adapt to being non-stationarity and is independent of channel density and recording duration. AFFiNE can be utilized for the removal of blink artifacts in situations where ICA may not be practically or theoretically useful.
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Affiliation(s)
- Kevin E. Alexander
- Department of Biomedical, Industrial, and Human Factors Engineering, College of Engineering and Computer Science, Wright State University, Dayton, OH 45435, USA;
- Oak Ridge Institute for Science and Education, Oak Ridge, TN 37831, USA
| | - Justin R. Estepp
- Department of Biomedical, Industrial, and Human Factors Engineering, College of Engineering and Computer Science, Wright State University, Dayton, OH 45435, USA;
- 711th Human Performance Wing, Air Force Research Laboratory, Wright-Patterson AFB, Dayton, OH 45433, USA
| | - Sherif M. Elbasiouny
- Department of Biomedical, Industrial, and Human Factors Engineering, College of Engineering and Computer Science, Wright State University, Dayton, OH 45435, USA;
- Department of Neuroscience, Cell Biology and Physiology, Boonshoft School of Medicine and College of Science and Mathematics, Wright State University, Dayton, OH 45435, USA
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Criel Y, Depuydt E, Miatton M, Santens P, van Mierlo P, De Letter M. Cortical Generators and Connections Underlying Phoneme Perception: A Mismatch Negativity and P300 Investigation. Brain Topogr 2024:10.1007/s10548-024-01065-z. [PMID: 38958833 DOI: 10.1007/s10548-024-01065-z] [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: 01/15/2024] [Accepted: 06/19/2024] [Indexed: 07/04/2024]
Abstract
The cortical generators of the pure tone MMN and P300 have been thoroughly studied. Their nature and interaction with respect to phoneme perception, however, is poorly understood. Accordingly, the cortical sources and functional connections that underlie the MMN and P300 in relation to passive and active speech sound perception were identified. An inattentive and attentive phonemic oddball paradigm, eliciting a MMN and P300 respectively, were administered in 60 healthy adults during simultaneous high-density EEG recording. For both the MMN and P300, eLORETA source reconstruction was performed. The maximal cross-correlation was calculated between ROI-pairs to investigate inter-regional functional connectivity specific to passive and active deviant processing. MMN activation clusters were identified in the temporal (insula, superior temporal gyrus and temporal pole), frontal (rostral middle frontal and pars opercularis) and parietal (postcentral and supramarginal gyrus) cortex. Passive discrimination of deviant phonemes was aided by a network connecting right temporoparietal cortices to left frontal areas. For the P300, clusters with significantly higher activity were found in the frontal (caudal middle frontal and precentral), parietal (precuneus) and cingulate (posterior and isthmus) cortex. Significant intra- and interhemispheric connections between parietal, cingulate and occipital regions constituted the network governing active phonemic target detection. A predominantly bilateral network was found to underly both the MMN and P300. While passive phoneme discrimination is aided by a fronto-temporo-parietal network, active categorization calls on a network entailing fronto-parieto-cingulate cortices. Neural processing of phonemic contrasts, as reflected by the MMN and P300, does not appear to show pronounced lateralization to the language-dominant hemisphere.
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Affiliation(s)
- Yana Criel
- Department of Rehabilitation Sciences, Ghent University, Ghent, Belgium.
| | - Emma Depuydt
- Medical Imaging and Signal Processing Group, Department of Electronics and Information Systems, Ghent University, Ghent, Belgium
| | - Marijke Miatton
- Department of Neurology, Ghent University Hospital, Ghent, Belgium
- Department of Head and Skin, Ghent University, Ghent, Belgium
| | - Patrick Santens
- Department of Neurology, Ghent University Hospital, Ghent, Belgium
- Department of Head and Skin, Ghent University, Ghent, Belgium
| | - Pieter van Mierlo
- Medical Imaging and Signal Processing Group, Department of Electronics and Information Systems, Ghent University, Ghent, Belgium
| | - Miet De Letter
- Department of Rehabilitation Sciences, Ghent University, Ghent, Belgium
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Pascarella A, Manzo L, Ferlazzo E. Modern neurophysiological techniques indexing normal or abnormal brain aging. Seizure 2024:S1059-1311(24)00194-8. [PMID: 38972778 DOI: 10.1016/j.seizure.2024.07.001] [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: 04/09/2024] [Accepted: 07/01/2024] [Indexed: 07/09/2024] Open
Abstract
Brain aging is associated with a decline in cognitive performance, motor function and sensory perception, even in the absence of neurodegeneration. The underlying pathophysiological mechanisms remain incompletely understood, though alterations in neurogenesis, neuronal senescence and synaptic plasticity are implicated. Recent years have seen advancements in neurophysiological techniques such as electroencephalography (EEG), magnetoencephalography (MEG), event-related potentials (ERP) and transcranial magnetic stimulation (TMS), offering insights into physiological and pathological brain aging. These methods provide real-time information on brain activity, connectivity and network dynamics. Integration of Artificial Intelligence (AI) techniques promise as a tool enhancing the diagnosis and prognosis of age-related cognitive decline. Our review highlights recent advances in these electrophysiological techniques (focusing on EEG, ERP, TMS and TMS-EEG methodologies) and their application in physiological and pathological brain aging. Physiological aging is characterized by changes in EEG spectral power and connectivity, ERP and TMS parameters, indicating alterations in neural activity and network function. Pathological aging, such as in Alzheimer's disease, is associated with further disruptions in EEG rhythms, ERP components and TMS measures, reflecting underlying neurodegenerative processes. Machine learning approaches show promise in classifying cognitive impairment and predicting disease progression. Standardization of neurophysiological methods and integration with other modalities are crucial for a comprehensive understanding of brain aging and neurodegenerative disorders. Advanced network analysis techniques and AI methods hold potential for enhancing diagnostic accuracy and deepening insights into age-related brain changes.
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Affiliation(s)
- Angelo Pascarella
- Department of Medical and Surgical Sciences, Magna Græcia University of Catanzaro, Italy; Regional Epilepsy Centre, Great Metropolitan "Bianchi-Melacrino-Morelli Hospital", Reggio Calabria, Italy.
| | - Lucia Manzo
- Regional Epilepsy Centre, Great Metropolitan "Bianchi-Melacrino-Morelli Hospital", Reggio Calabria, Italy
| | - Edoardo Ferlazzo
- Department of Medical and Surgical Sciences, Magna Græcia University of Catanzaro, Italy; Regional Epilepsy Centre, Great Metropolitan "Bianchi-Melacrino-Morelli Hospital", Reggio Calabria, Italy
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Horger MN, Campbell K, Marshall PJ. Electrophysiological responses to digit stimulation in a tactile oddball paradigm. Int J Psychophysiol 2024; 203:112391. [PMID: 38964544 DOI: 10.1016/j.ijpsycho.2024.112391] [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: 10/26/2023] [Revised: 06/19/2024] [Accepted: 07/01/2024] [Indexed: 07/06/2024]
Abstract
Sensory memory traces are assessed via oddball paradigms in which deviant (infrequent) stimuli are interspersed into a string of standard (frequent) stimuli. Once a memory trace for the standard is established, the deviant spurs a change detection response measured via the resulting event related potential (ERP). Response magnitude is sensitive to the differences in stimuli properties or categories and influenced by individual experience. The goal of the present study was to use ERPs to test the relation between individual digits in the somatosensory cortex and the extent to which digit representations are influenced by individual differences in experience such as independent mobility and playing video games. The present study of 60 undergraduates utilized a passive tactile oddball paradigm, stimulating the thumb, middle, and little fingers. The oddball paradigm was fully matched with each digit serving as the standard and deviant. A temporal principal component analysis (tPCA) identified factors that matched three a priori ERP components: N80, somatosensory mismatch negativity (sMMN), and P300. Analyses confirmed the anticipated differences between standards and deviants and provided some support for prior ERP work suggesting the thumb is in a different functional category than the other digits. Independent control of individual digits (such as the little finger) was positively related to only one aspect of the ERP (P3a) while video game experience was not associated with ERP differences. Cumulatively, these results provide a more nuanced examination of tactile oddball paradigms and how ERP methods can shed light on the relations between different digits.
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Affiliation(s)
- Melissa N Horger
- University of Massachusetts Amherst, Department of Psychological and Brain Sciences, United States of America.
| | - Kaitlyn Campbell
- Temple University, Department of Psychology and Neuroscience, United States of America
| | - Peter J Marshall
- Temple University, Department of Psychology and Neuroscience, United States of America
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Zhang K, Li K, Zhang C, Li X, Han S, Lv C, Xie J, Xia X, Bie L, Guo Y. The accuracy of different mismatch negativity amplitude representations in predicting the levels of consciousness in patients with disorders of consciousness. Front Neurosci 2023; 17:1293798. [PMID: 38178839 PMCID: PMC10764429 DOI: 10.3389/fnins.2023.1293798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 12/04/2023] [Indexed: 01/06/2024] Open
Abstract
Introduction The mismatch negativity (MMN) index has been used to evaluate consciousness levels in patients with disorders of consciousness (DoC). Indeed, MMN has been validated for the diagnosis of vegetative state/unresponsive wakefulness syndrome (VS/UWS) and minimally conscious state (MCS). In this study, we evaluated the accuracy of different MMN amplitude representations in predicting levels of consciousness. Methods Task-state electroencephalography (EEG) data were obtained from 67 patients with DoC (35 VS and 32 MCS). We performed a microstate analysis of the task-state EEG and used four different representations (the peak amplitude of MMN at electrode Fz (Peak), the average amplitude within a time window -25- 25 ms entered on the latency of peak MMN component (Avg for peak ± 25 ms), the average amplitude of averaged difference wave for 100-250 ms (Avg for 100-250 ms), and the average amplitude difference between the standard stimulus ("S") and the deviant stimulus ("D") at the time corresponding to Microstate 1 (MS1) (Avg for MS1) of the MMN amplitude to predict the levels of consciousness. Results The results showed that among the four microstates clustered, MS1 showed statistical significance in terms of time proportion during the 100-250 ms period. Our results confirmed the activation patterns of MMN through functional connectivity analysis. Among the four MMN amplitude representations, the microstate-based representation showed the highest accuracy in distinguishing different levels of consciousness in patients with DoC (AUC = 0.89). Conclusion We discovered a prediction model based on microstate calculation of MMN amplitude can accurately distinguish between MCS and VS states. And the functional connection of the MS1 is consistent with the activation mode of MMN.
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Affiliation(s)
- Kang Zhang
- Department of Neurosurgery, The First Hospital of Jilin University, Changchun, China
| | - Kexin Li
- Department of Endocrinology, Jilin Province People’s Hospital, Changchun, China
| | - Chunyun Zhang
- Department of Neurosurgery, Qilu Hospital of Shandong University (Qingdao), Qingdao, China
| | - Xiaodong Li
- Department of Neurosurgery, Siping Central People’s Hospital, Siping, China
| | - Shuai Han
- Department of Neurosurgery, The First Hospital of Jilin University, Changchun, China
| | - Chuanxiang Lv
- Department of Neurosurgery, The First Hospital of Jilin University, Changchun, China
| | - Jingwei Xie
- Department of Neurosurgery, Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Xiaoyu Xia
- Department of Neurosurgery, The First Medical Center of People’s Liberation Army (PLA) General Hospital, Beijing, China
- Department of Neurosurgery, The Seventh Medical Center of Liberation Army (PLA) General Hospital, Beijing, China
| | - Li Bie
- Department of Neurosurgery, The First Hospital of Jilin University, Changchun, China
| | - Yongkun Guo
- Department of Neurosurgery, Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- Henan Key Laboratory of Brain Science and Brain Computer Interface Technology, Zhengzhou, China
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Valt C, Quarto T, Tavella A, Romanelli F, Fazio L, Arcara G, Altamura M, Barrasso G, Bellomo A, Blasi G, Brudaglio F, Carofiglio A, D'Ambrosio E, Padalino FA, Rampino A, Saponaro A, Semisa D, Suma D, Pergola G, Bertolino A. Reduced magnetic mismatch negativity: a shared deficit in psychosis and related risk. Psychol Med 2023; 53:6037-6045. [PMID: 36321391 DOI: 10.1017/s003329172200321x] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Abnormal auditory processing of deviant stimuli, as reflected by mismatch negativity (MMN), is often reported in schizophrenia (SCZ). At present, it is still under debate whether this dysfunctional response is specific to the full-blown SCZ diagnosis or rather a marker of psychosis in general. The present study tested MMN in patients with SCZ, bipolar disorder (BD), first episode of psychosis (FEP), and in people at clinical high risk for psychosis (CHR). METHODS Source-based MEG activity evoked during a passive auditory oddball task was recorded from 135 patients grouped according to diagnosis (SCZ, BD, FEP, and CHR) and 135 healthy controls also divided into four subgroups, age- and gender-matched with diagnostic subgroups. The magnetic MMN (mMMN) was analyzed as event-related field (ERF), Theta power, and Theta inter-trial phase coherence (ITPC). RESULTS The clinical group as a whole showed reduced mMMN ERF amplitude, Theta power, and Theta ITPC, without any statistically significant interaction between diagnosis and mMMN reductions. The mMMN subgroup contrasts showed lower ERF amplitude in all the diagnostic subgroups. In the analysis of Theta frequency, SCZ showed significant power and ITPC reductions, while only indications of diminished ITPC were observed in CHR, but no significant decreases characterized BD and FEP. CONCLUSIONS Significant mMMN alterations in people experiencing psychosis, also for diagnoses other than SCZ, suggest that this neurophysiological response may be a feature shared across psychotic disorders. Additionally, reduced Theta ITPC may be associated with risk for psychosis.
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Affiliation(s)
- Christian Valt
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari Aldo Moro, Bari, Italy
| | - Tiziana Quarto
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari Aldo Moro, Bari, Italy
- Department of Humanities, University of Foggia, Foggia, Italy
| | | | | | - Leonardo Fazio
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari Aldo Moro, Bari, Italy
- Department of Medicine and Surgery, LUM University, Casamassima, Italy
| | | | - Mario Altamura
- Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
| | - Giuseppe Barrasso
- Department of Mental Health, ASL Barletta-Andria-Trani, Andria, Italy
| | - Antonello Bellomo
- Department of Clinical and Experimental Medicine, University of Foggia, Foggia, Italy
| | - Giuseppe Blasi
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari Aldo Moro, Bari, Italy
- Bari University Hospital, Bari, Italy
| | - Flora Brudaglio
- Department of Mental Health, ASL Barletta-Andria-Trani, Andria, Italy
| | | | - Enrico D'Ambrosio
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari Aldo Moro, Bari, Italy
- Bari University Hospital, Bari, Italy
- Department of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience - King's College London, London, UK
| | | | - Antonio Rampino
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari Aldo Moro, Bari, Italy
- Bari University Hospital, Bari, Italy
| | | | | | - Domenico Suma
- Department of Mental Health, ASL Brindisi, Brindisi, Italy
| | - Giulio Pergola
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari Aldo Moro, Bari, Italy
| | - Alessandro Bertolino
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari Aldo Moro, Bari, Italy
- Bari University Hospital, Bari, Italy
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Deng J, Chen S, Ou Y, Zhang Y, Lin Z, Shen Y, Ye Y. Auditory P300 in individuals with high schizotypy: associations of schizotypal traits with amplitude and latency under different oddball conditions. Front Hum Neurosci 2023; 17:1107858. [PMID: 37275344 PMCID: PMC10232759 DOI: 10.3389/fnhum.2023.1107858] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2022] [Accepted: 05/02/2023] [Indexed: 06/07/2023] Open
Abstract
Background The aim of this study was to compare the characteristics of auditory P300 between non-clinical individuals with high and low schizotypal traits, and investigate the relationship between schizotypy and P300 under various oddball conditions. Methods An extreme-group design was adopted. After screening 1,519 young adults using the Schizotypal Personality Questionnaire (SPQ), sixty-three participants were chosen and divided into two groups (schizotypy group: 31 participants; control group: 32 participants). Basic demographic information was assessed and matched between groups. Depression and anxiety indexes were evaluated and controlled. The P300 component was evoked by an auditory oddball paradigm with different frequencies and durations. Results (1) The duration P300 amplitude at PZ site was significantly weaker in the schizotypy group than in the control group [F(1,54) = 7.455, p = 0.009, ηp2 = 0.121]. (2) In the schizotypy group, the latency of frequency P300 at PZ site under large-variant oddball condition was significantly correlated with total SPQ scores (rp = 0.451, p = 0.018) and disorganized dimension scores (rp = 0.381, p = 0.050). (3) In the control group, significantly negative correlations was found between the negative dimension score of SPQ and the frequency P300 amplitudes under small variant condition (PZ: rp = -0.393, p = 0.043; CPZ: rp = -0.406, p = 0.035). In addition, a significant negative relationship was found between disorganized dimension scores and the duration P300 latency at CPZ site under large-variant oddball condition (rp = -0.518, p = 0.006). Moreover, a significant negative association was found between the duration P300 amplitude at CPZ site under small-variant oddball condition and negative factor scores (rp = -0.410, p = 0.034). Conclusion Individuals with high schizotypal traits were likely to have deficient attention and hypoactive working memory for processing auditory information, especially the duration of sounds. P300 effects were correlated with negative and disorganized schizotypy, rather than positive schizotypy. There were diverse patterns of relationship between schizotypal traits and P300 under different oddball conditions, suggesting that characteristics and parameters of target stimuli should be considered cautiously when implementing an auditory oddball paradigm for individuals with schizophrenia spectrum.
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Affiliation(s)
- Jue Deng
- Cognitive Neuroscience and Abnormal Psychology Laboratory, Department of Penalty Execution, Fujian Police College, Fuzhou, China
| | - Siwei Chen
- School of Psychology, Fujian Normal University, Fuzhou, China
| | - Yuanhua Ou
- Cognitive Neuroscience and Abnormal Psychology Laboratory, Department of Penalty Execution, Fujian Police College, Fuzhou, China
| | - Yuanjun Zhang
- School of Psychology, Fujian Normal University, Fuzhou, China
| | - Ziyue Lin
- School of Basic Medical Sciences, Fujian Medical University, Fuzhou, China
| | - Yane Shen
- School of Psychology, Fujian Normal University, Fuzhou, China
| | - Yiduo Ye
- School of Psychology, Fujian Normal University, Fuzhou, China
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Tavakoli P, Murkar A, Porteous M, Carrier J, Robillard R. The Effects of Total Sleep Deprivation on Attention Capture Processes in Young and Older Adults: An ERP Study. Exp Aging Res 2023; 49:130-151. [PMID: 35369858 DOI: 10.1080/0361073x.2022.2057120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BACKGROUND The present study investigated whether sleep deprivation affects attention capture in young and older adults using event-related potentials (ERPs). METHODS Eleven young adults (20-30 y) and nine older adults (60-70 y) were tested following both normal sleep (NS) and total sleep deprivation (TSD). ERPs were recorded during an auditory discrimination task consisting of standard and deviant stimuli. RESULTS Deviant stimuli elicited the MMN, P3a, and RON ERPs. TSD attenuated the differences in reaction times between standards and deviants in young adults but not older adults. The P3a was attenuated in older adults compared to young adults. Older adults had a larger RON amplitude compared to young adults following NS, but not TSD. CONCLUSIONS The reduced P3a and the absence of behavioral performance alteration in the older group suggests that older adults may utilize different neural processing strategies compared to younger adults to compensate for age-related declines in neural resources for attention capture. Sleep loss influenced age-related differences on the RON, suggesting that older adults may have reduced access to compensatory strategies following sleep loss.
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Affiliation(s)
- Paniz Tavakoli
- Language, Memory, and Brain Lab at the ARiEAL Research Centre, ARiEAL Research Centre, McMaster University, Hamilton, ON, Canada.,Sleep Research Unit, University of Ottawa Institute of Mental Health Research, Ottawa, ON, Canada
| | - Anthony Murkar
- Sleep Research Unit, University of Ottawa Institute of Mental Health Research, Ottawa, ON, Canada
| | - Meggan Porteous
- Sleep Research Unit, University of Ottawa Institute of Mental Health Research, Ottawa, ON, Canada.,School of Psychology, University of Ottawa, Ottawa, ON, Canada
| | - Julie Carrier
- Department of Psychology, University of Montreal, Montreal, Qc, Canada
| | - Rebecca Robillard
- Sleep Research Unit, University of Ottawa Institute of Mental Health Research, Ottawa, ON, Canada.,School of Psychology, University of Ottawa, Ottawa, ON, Canada
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Perrottelli A, Giordano GM, Brando F, Giuliani L, Pezzella P, Mucci A, Galderisi S. Unveiling the Associations between EEG Indices and Cognitive Deficits in Schizophrenia-Spectrum Disorders: A Systematic Review. Diagnostics (Basel) 2022; 12:diagnostics12092193. [PMID: 36140594 PMCID: PMC9498272 DOI: 10.3390/diagnostics12092193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 09/05/2022] [Accepted: 09/06/2022] [Indexed: 11/16/2022] Open
Abstract
Cognitive dysfunctions represent a core feature of schizophrenia-spectrum disorders due to their presence throughout different illness stages and their impact on functioning. Abnormalities in electrophysiology (EEG) measures are highly related to these impairments, but the use of EEG indices in clinical practice is still limited. A systematic review of articles using Pubmed, Scopus and PsychINFO was undertaken in November 2021 to provide an overview of the relationships between EEG indices and cognitive impairment in schizophrenia-spectrum disorders. Out of 2433 screened records, 135 studies were included in a qualitative review. Although the results were heterogeneous, some significant correlations were identified. In particular, abnormalities in alpha, theta and gamma activity, as well as in MMN and P300, were associated with impairments in cognitive domains such as attention, working memory, visual and verbal learning and executive functioning during at-risk mental states, early and chronic stages of schizophrenia-spectrum disorders. The review suggests that machine learning approaches together with a careful selection of validated EEG and cognitive indices and characterization of clinical phenotypes might contribute to increase the use of EEG-based measures in clinical settings.
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Wattanathorn J, Somboonporn W, Thukham-Mee W, Sungkamnee S. Memory-Enhancing Effect of 8-Week Consumption of the Quercetin-Enriched Culinary Herbs-Derived Functional Ingredients: A Randomized, Double-Blind, Placebo-Controlled Clinical Trial. Foods 2022; 11:foods11172678. [PMID: 36076862 PMCID: PMC9455773 DOI: 10.3390/foods11172678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 08/22/2022] [Accepted: 08/27/2022] [Indexed: 11/24/2022] Open
Abstract
Due to great demand for memory enhancers, the memory-enhancing effects and the possible underlying mechanisms of the functional ingredients derived from the combined extract of Polygonum odoratum and Morus alba were investigated. A total of 45 participants randomly received either a placebo or the developed herbal supplement at a dose of 50 or 1500 mg/day. The consumption was done once daily for 8 weeks. Working memory was assessed via both an event-related potential and computerized battery tests at baseline and at the end of the 8-week study period. Acetylcholinesterase (AChE) and monoamine oxidase type A and type B (MAO-A, MAO-B) levels were also measured at the end of the study. The subjects who consumed the supplement containing a developed functional ingredient at a dose of 1500 mg/day showed reduced latencies but increased amplitudes of N100 and P300. An improvement in working memory and the suppression of AChE, MAO-A, and MAO-B activities were also observed. Therefore, this study clearly demonstrates the cognitive enhancing effect of the developed herbal congee, which may be associated with the suppressions of AChE and both types of MAO.
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Affiliation(s)
- Jintanaporn Wattanathorn
- Department of Physiology, Faculty of Medicine, Research Institute of High Human Performance and Health Promotion, Khon Kaen University, Khon Kaen 40002, Thailand
- Correspondence: ; Tel.: +66-81-8721809
| | - Woraluck Somboonporn
- Department of Obstetrics and Gynecology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Wipawee Thukham-Mee
- Department of Physiology, Faculty of Medicine, Research Institute of High Human Performance and Health Promotion, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Sudarat Sungkamnee
- Department of Physiology, Faculty of Medicine, Research Institute of High Human Performance and Health Promotion, Khon Kaen University, Khon Kaen 40002, Thailand
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12
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Yerlikaya D, Hünerli-Gündüz D, Fide E, Özbek Y, Kıyı İ, Öztura İ, Yener GG. The reliability of P300 and the influence of age, gender and education variables in a 50 years and older normative sample. Int J Psychophysiol 2022; 181:1-13. [PMID: 35988895 DOI: 10.1016/j.ijpsycho.2022.08.002] [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: 02/23/2022] [Revised: 08/10/2022] [Accepted: 08/16/2022] [Indexed: 11/15/2022]
Abstract
OBJECTIVES The present study aims to investigate the effects of age, gender, and level of education on P300 in a healthy population, aged 50 years and over; and determine the reliability metrics for different conditions and measurement methods. METHOD Auditory and visual oddball recordings of 171 healthy adults were investigated. A fully automated preprocessing was applied to elicit ERP P300. Maximum peak amplitude, latency and mean amplitudes were measured. Data were stratified by age, gender, and education to determine group-level differences by using repeat measures of ANOVA. The internal consistency of P300 was calculated by a split-half method using odd-even segments. Test-retest reliability was assessed by calculating the intraclass correlation coefficient (ICC). RESULTS Maximum peak P300 amplitudes were higher in the 50-64 years age group compared to the >65 years age group; and females showed increased P300 amplitudes compared to males. P300 measures showed fair to good internal consistency and poor to good test-retest reliability. CONCLUSION Age and gender should be taken into account when designing ERP studies with elderly individuals. P300 showed good internal consistency in general, between gender groups and age groups. Long-term test-retest reliability was lower but acceptable. These findings can be interpreted as the strength of P300 by being an objective and reliable method independent of cultural differences. Here we underline several factors that may affect P300 measures and discuss other possible factors that should be standardized for P300 to be used in clinical settings.
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Affiliation(s)
- Deniz Yerlikaya
- Department of Neurosciences, Institute of Health Sciences, Dokuz Eylül University, 35340 Izmir, Turkey
| | - Duygu Hünerli-Gündüz
- Department of Neurosciences, Institute of Health Sciences, Dokuz Eylül University, 35340 Izmir, Turkey
| | - Ezgi Fide
- Department of Neurosciences, Institute of Health Sciences, Dokuz Eylül University, 35340 Izmir, Turkey
| | - Yağmur Özbek
- Department of Neurosciences, Institute of Health Sciences, Dokuz Eylül University, 35340 Izmir, Turkey
| | - İlayda Kıyı
- Department of Neurosciences, Institute of Health Sciences, Dokuz Eylül University, 35340 Izmir, Turkey
| | - İbrahim Öztura
- Department of Neurology, Dokuz Eylül University Medical School, 35340 Izmir, Turkey; Brain Dynamics Multidisciplinary Research Center, Dokuz Eylül University, 35340 Izmir, Turkey.
| | - Görsev G Yener
- Brain Dynamics Multidisciplinary Research Center, Dokuz Eylül University, 35340 Izmir, Turkey; İzmir University of Economics, Faculty of Medicine, 35330 Izmir, Turkey; Izmir International Biomedicine and Genome Institute, Dokuz Eylul University, Izmir, Turkey.
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13
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Abramov DM, Loureiro CBP, Abramov AK, Salles TRS, Moreira MEL, Lazarev VV. Mismatch Negativity is associated with affective social behavior in microcephaly. Int J Psychophysiol 2022; 180:10-16. [PMID: 35868544 DOI: 10.1016/j.ijpsycho.2022.07.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 07/02/2022] [Accepted: 07/13/2022] [Indexed: 11/18/2022]
Abstract
Some children with severe microcephaly related to Zika virus infection show affective social-like behavior, such as smiling and rejection to a stranger's lap. Our objective was to check the association between this behavior and the occurrence of Mismatch Response (MMR) in event-related potentials. Twenty eight microcephalic children, aged 1-3 years, were divided in Affect(+) and Affect(-) groups, according to either the presence or absence of affective social-like behavior, respectively, and underwent the OddBall paradigm with vowels as auditory stimuli. MMR was statistically estimated comparing MMR sample means between both groups. The Affect(+) group significantly differed from the Affect(-) group and, as opposed to the latter, showed MMR as Mismatch Negativity (MMN) in the left occipital, left and right posterior temporal, and (especially) the right and median parietal leads. The relationship observed between MMN and affective social-like behavior suggests that these children may have cognitive mechanisms capable of providing some social interaction, despite their profound neurological dysfunction. MMN diagnostic techniques seem to be promising for the triage of microcephalic subjects regarding cognitive functions and for choosing a strategy for some social adaptation.
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Affiliation(s)
- Dimitri Marques Abramov
- Laboratory of Neurobiology and Clinical Neurophysiology, National Institute of Women, Children and Adolescents Health Fernandes Figueira, Oswaldo Cruz Foundation (FIOCRUZ), Rio de Janeiro, Brazil
| | - Caroline Barros Pacheco Loureiro
- Laboratory of Neurobiology and Clinical Neurophysiology, National Institute of Women, Children and Adolescents Health Fernandes Figueira, Oswaldo Cruz Foundation (FIOCRUZ), Rio de Janeiro, Brazil
| | - Amanda Kamil Abramov
- Laboratory of Neurobiology and Clinical Neurophysiology, National Institute of Women, Children and Adolescents Health Fernandes Figueira, Oswaldo Cruz Foundation (FIOCRUZ), Rio de Janeiro, Brazil
| | - Tania Regina Saad Salles
- Laboratory of Neurobiology and Clinical Neurophysiology, National Institute of Women, Children and Adolescents Health Fernandes Figueira, Oswaldo Cruz Foundation (FIOCRUZ), Rio de Janeiro, Brazil
| | - Maria Elizabeth Lopes Moreira
- Clinical Research Unit, National Institute of Women, Children and Adolescents Health Fernandes Figueira, Oswaldo Cruz Foundation (FIOCRUZ), Rio de Janeiro, Brazil
| | - Vladimir V Lazarev
- Laboratory of Neurobiology and Clinical Neurophysiology, National Institute of Women, Children and Adolescents Health Fernandes Figueira, Oswaldo Cruz Foundation (FIOCRUZ), Rio de Janeiro, Brazil.
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14
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Arutiunian V, Arcara G, Buyanova I, Gomozova M, Dragoy O. The age-related changes in 40 Hz Auditory Steady-State Response and sustained Event-Related Fields to the same amplitude-modulated tones in typically developing children: A magnetoencephalography study. Hum Brain Mapp 2022; 43:5370-5383. [PMID: 35833318 PMCID: PMC9812253 DOI: 10.1002/hbm.26013] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 06/24/2022] [Accepted: 06/24/2022] [Indexed: 01/15/2023] Open
Abstract
Recent studies have revealed that gamma-band oscillatory and transient evoked potentials may change with age during childhood. It is hypothesized that these changes can be associated with a maturation of GABAergic neurotransmission and, subsequently, the age-related changes of excitation-inhibition balance in the neural circuits. One of the reliable paradigms for investigating these effects in the auditory cortex is 40 Hz Auditory Steady-State Response (ASSR), where participants are presented with the periodic auditory stimuli. It is known that such stimuli evoke two types of responses in magnetoencephalography (MEG)-40 Hz steady-state gamma response (or 40 Hz ASSR) and auditory evoked response called sustained Event-Related Field (ERF). Although several studies have been conducted in children, focusing on the changes of 40 Hz ASSR with age, almost nothing is known about the age-related changes of the sustained ERF to the same periodic stimuli and their relationships with changes in the gamma strength. Using MEG, we investigated the association between 40 Hz steady-state gamma response and sustained ERF response to the same stimuli and also their age-related changes in the group of 30 typically developing 7-to-12-year-old children. The results revealed a tight relationship between 40 Hz ASSR and ERF, indicating that the age-related increase in strength of 40 Hz ASSR was associated with the age-related decrease of the amplitude of ERF. These effects were discussed in the light of the maturation of the GABAergic system and excitation-inhibition balance development, which may contribute to the changes in ASSR and ERF.
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Affiliation(s)
| | | | | | | | - Olga Dragoy
- Center for Language and BrainHSE UniversityMoscowRussia,Institute of LinguisticsRussian Academy of SciencesMoscowRussia
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15
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Sex differences in cognitive processing: An integrative review of electrophysiological findings. Biol Psychol 2022; 172:108370. [DOI: 10.1016/j.biopsycho.2022.108370] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 04/20/2022] [Accepted: 05/26/2022] [Indexed: 01/14/2023]
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16
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Maciejewska K, Froelich W. Hierarchical Classification of Event-Related Potentials for the Recognition of Gender Differences in the Attention Task. ENTROPY (BASEL, SWITZERLAND) 2021; 23:1547. [PMID: 34828245 PMCID: PMC8617798 DOI: 10.3390/e23111547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Revised: 11/15/2021] [Accepted: 11/17/2021] [Indexed: 11/16/2022]
Abstract
Research on the functioning of human cognition has been a crucial problem studied for years. Electroencephalography (EEG) classification methods may serve as a precious tool for understanding the temporal dynamics of human brain activity, and the purpose of such an approach is to increase the statistical power of the differences between conditions that are too weak to be detected using standard EEG methods. Following that line of research, in this paper, we focus on recognizing gender differences in the functioning of the human brain in the attention task. For that purpose, we gathered, analyzed, and finally classified event-related potentials (ERPs). We propose a hierarchical approach, in which the electrophysiological signal preprocessing is combined with the classification method, enriched with a segmentation step, which creates a full line of electrophysiological signal classification during an attention task. This approach allowed us to detect differences between men and women in the P3 waveform, an ERP component related to attention, which were not observed using standard ERP analysis. The results provide evidence for the high effectiveness of the proposed method, which outperformed a traditional statistical analysis approach. This is a step towards understanding neuronal differences between men's and women's brains during cognition, aiming to reduce the misdiagnosis and adverse side effects in underrepresented women groups in health and biomedical research.
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Affiliation(s)
- Karina Maciejewska
- Institute of Biomedical Engineering, Faculty of Science and Technology, University of Silesia in Katowice, 75 Pulku Piechoty 1a Street, 41-500 Chorzow, Poland
| | - Wojciech Froelich
- Institute of Computer Science, Faculty of Science and Technology, University of Silesia in Katowice, Bedzinska 39 Street, 41-205 Sosnowiec, Poland;
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17
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Wetekam J, Hechavarría J, López-Jury L, Kössl M. Correlates of deviance detection in auditory brainstem responses of bats. Eur J Neurosci 2021; 55:1601-1613. [PMID: 34766394 DOI: 10.1111/ejn.15527] [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: 08/11/2021] [Revised: 10/19/2021] [Accepted: 11/08/2021] [Indexed: 11/28/2022]
Abstract
Identifying unexpected acoustic inputs, which allows to react appropriately to new situations, is of major importance for animals. Neural deviance detection describes a change of neural response strength to a stimulus solely caused by the stimulus' probability of occurrence. In the present study, we searched for correlates of deviance detection in auditory brainstem responses obtained in anaesthetised bats (Carollia perspicillata). In an oddball paradigm, we used two pure tone stimuli that represented the main frequencies used by the animal during echolocation (60 kHz) and communication (20 kHz). For both stimuli, we could demonstrate significant differences of response strength between deviant and standard response in slow and fast components of the auditory brainstem response. The data suggest the presence of correlates of deviance detection in brain stations below the IC, at the level of the cochlea nucleus and lateral lemniscus. Additionally, our results suggest that deviance detection is mainly driven by repetition suppression in the echolocation frequency band, while in the communication band, a deviant-related enhancement of the response plays a more important role. This finding suggests a contextual dependence of the mechanisms underlying subcortical deviance detection. The present study demonstrates the value of auditory brainstem responses for studying deviance detection and suggests that auditory specialists, such as bats, use different frequency-specific strategies to ensure an appropriate sensation of unexpected sounds.
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Affiliation(s)
- Johannes Wetekam
- Institute of Cell Biology and Neuroscience, Goethe University, Frankfurt am Main, Germany
| | - Julio Hechavarría
- Institute of Cell Biology and Neuroscience, Goethe University, Frankfurt am Main, Germany
| | - Luciana López-Jury
- Institute of Cell Biology and Neuroscience, Goethe University, Frankfurt am Main, Germany
| | - Manfred Kössl
- Institute of Cell Biology and Neuroscience, Goethe University, Frankfurt am Main, Germany
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18
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Tsolaki M, Tsatali M, Gkioka M, Poptsi E, Tsolaki A, Papaliagkas V, Tabakis IM, Lazarou I, Makri M, Kazis D, Papagiannopoulos S, Kiryttopoulos A, Koutsouraki E, Tegos T. Memory Clinics and Day Care Centers in Thessaloniki, Northern Greece: 30 Years of Clinical Practice and Experience. Front Neurol 2021; 12:683131. [PMID: 34512506 PMCID: PMC8425245 DOI: 10.3389/fneur.2021.683131] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Accepted: 06/25/2021] [Indexed: 11/17/2022] Open
Abstract
Background: This review describes the diagnostic and interventional procedures conducted in two university memory clinics (established network of G. Papanikolaou Hospital: 1988–2017 and AHEPA hospital: 2017–today) and 2 day care centers (established network of DCCs: 2005–today) in North Greece and their contribution in the scientific field of dementia. The aims of this work are (1) to provide a diagnosis and treatment protocol established in the network of memory clinics and DCCs and (2) to present further research conducted in the aforementioned network during the last 30 years of clinical practice. Methods: The guidelines to set a protocol demand a series of actions as follows: (1) set the diagnosis criteria, neuropsychological assessment, laboratory examinations, and examination of neurophysiological, neuroimaging, cerebrospinal fluid, blood, and genetic markers; and (2) apply non-pharmacological interventions according to the needs and specialized psychosocial interventions of the patient to the caregivers of the patient. Results: In addition to the guidelines followed in memory clinics at the 1st and 3rd Department of Neurology and two DCCs, a database of patients, educational programs, and further participation in international research programs, including clinical trials, make our contribution in the dementia field strong. Conclusion: In the current paper, we provide useful guidelines on how major and minor neurocognitive disorders are being treated in Thessaloniki, Greece, describing successful practices which have been adapted in the last 30 years.
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Affiliation(s)
- Magda Tsolaki
- Greek Association of Alzheimer's Disease and Related Disorders (GAADRD), Thessaloniki, Greece.,1st University Department of Neurology UH "AHEPA", School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece.,Laboratory of Neurodegenerative Diseases, Center for Interdisciplinary Research and Innovation (CIRI - AUTh) Balkan Center, Buildings A & B, Aristotle University of Thessaloniki, Thessaloniki, Greece.,3rd University Department of Neurology "G. Papanikolaou" Hospital, Faculty of Health Sciences, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Marianna Tsatali
- Greek Association of Alzheimer's Disease and Related Disorders (GAADRD), Thessaloniki, Greece
| | - Mara Gkioka
- Greek Association of Alzheimer's Disease and Related Disorders (GAADRD), Thessaloniki, Greece.,1st University Department of Neurology UH "AHEPA", School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Eleni Poptsi
- Greek Association of Alzheimer's Disease and Related Disorders (GAADRD), Thessaloniki, Greece
| | - Anthoula Tsolaki
- Greek Association of Alzheimer's Disease and Related Disorders (GAADRD), Thessaloniki, Greece.,1st University Department of Neurology UH "AHEPA", School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Vasileios Papaliagkas
- Greek Association of Alzheimer's Disease and Related Disorders (GAADRD), Thessaloniki, Greece.,Department of Biomedical Sciences International Hellenic University, Thessaloniki, Greece
| | - Irene-Maria Tabakis
- Greek Association of Alzheimer's Disease and Related Disorders (GAADRD), Thessaloniki, Greece
| | - Ioulietta Lazarou
- 1st University Department of Neurology UH "AHEPA", School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Marina Makri
- Greek Association of Alzheimer's Disease and Related Disorders (GAADRD), Thessaloniki, Greece.,1st University Department of Neurology UH "AHEPA", School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Dimitrios Kazis
- 3rd University Department of Neurology "G. Papanikolaou" Hospital, Faculty of Health Sciences, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Sotirios Papagiannopoulos
- 3rd University Department of Neurology "G. Papanikolaou" Hospital, Faculty of Health Sciences, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Andreas Kiryttopoulos
- 1st University Department of Neurology UH "AHEPA", School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Efrosyni Koutsouraki
- 1st University Department of Neurology UH "AHEPA", School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Thomas Tegos
- 1st University Department of Neurology UH "AHEPA", School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece
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19
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Kanatome A, Ano Y, Shinagawa K, Ide Y, Shibata M, Umeda S. β-Lactolin Enhances Neural Activity, Indicated by Event-Related P300 Amplitude, in Healthy Adults: A Randomized Controlled Trial. J Alzheimers Dis 2021; 81:787-796. [PMID: 33814437 PMCID: PMC8203246 DOI: 10.3233/jad-201413] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
Background: Epidemiological studies have shown that dairy product consumption is beneficial for cognitive function in elderly individuals. β-lactolin is a Gly–Thr–Trp–Tyr lacto-tetrapeptide rich in fermented dairy products that improves memory retrieval, attention, and executive function in older adults with subjective cognitive decline and prevents the pathology of Alzheimer’s disease in rodents. There has been no study on the effects of β-lactolin on neural activity in humans. Objective: We investigated the effects of β-lactolin on neural activity and cognitive function in healthy adults. Methods: In this randomized, double-blind, placebo-controlled study, 30 participants (45–64 years old) consumed β-lactolin or placebo for 6 weeks. Neural activity during auditory and language tasks was measured through 64-channel electroencephalography. Moreover, verbal fluency tests were performed at baseline and after 6 weeks. Results: The β-lactolin group had a significantly higher P300 amplitude at the Cp2 site (a part of the parietal lobe near the center of brain, p = 0.011), and C4 site (the area between the frontal and parietal lobe, p = 0.02) during the auditory tasks after 6 weeks than the placebo group. Thus, β-lactolin supplementation promoted neural activity in the parietal area, which increases concentration and attention during auditory cognitive tasks. Compared with the placebo group, the β-lactolin group also showed significant changes in the scores of verbal fluency test after 6 weeks (p = 0.033). Conclusion: Our findings provide insight into the mechanisms underlying the effects of β-lactolin on attention in healthy adults.
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Affiliation(s)
- Ayana Kanatome
- Kirin Central Research Institute, Kirin Holdings Company, Ltd., Fujisawa, Kanagawa, Japan
| | - Yasuhisa Ano
- Kirin Central Research Institute, Kirin Holdings Company, Ltd., Fujisawa, Kanagawa, Japan
| | - Kazushi Shinagawa
- Department of Psychology, Keio University, Mita, Minato-ku, Tokyo, Japan
| | - Yumiko Ide
- Tokyo Center Clinic, Chuo-ku, Tokyo, Japan
| | - Midori Shibata
- Department of Psychology, Keio University, Mita, Minato-ku, Tokyo, Japan
| | - Satoshi Umeda
- Department of Psychology, Keio University, Mita, Minato-ku, Tokyo, Japan
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20
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Toufan R, Aghamolaei M, Ashayeri H. Differential effects of gender on mismatch negativity to violations of simple and pattern acoustic regularities. Brain Behav 2021; 11:e2248. [PMID: 34124855 PMCID: PMC8413778 DOI: 10.1002/brb3.2248] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 04/23/2021] [Accepted: 05/25/2021] [Indexed: 02/02/2023] Open
Abstract
INTRODUCTION The effects of gender on the mismatch negativity (MMN) potential have been studied using simple frequency deviants. However, the effects of gender on MMN to violations of abstract regularities have not yet been studied. Here, we addressed this issue and compared the effects of gender on simple and pattern frequency MMNs. METHODS MMN response was recorded from 29 healthy young adults, 14 females (mean age = 26.20 ± 2.17) and 15 males (mean age = 27.57 ± 2.24), using 32 scalp electrodes during simple and pattern frequency oddball paradigms and the mean amplitude, peak latency, and scalp topography of MMN evoked by each paradigm were compared between the two genders. RESULTS The peak latency of simple MMN was significantly longer in females (p < .05); however, its mean amplitude and topography were similar between the two genders (p > .05). There were no significant differences in peak latency, mean amplitude, and scalp topography of pattern MMN between the two genders (p > .05). CONCLUSIONS Based on the obtained results, gender differently affects simple and pattern MMN. These findings may provide preliminary evidence for distinct effects of gender on various types of MMN.
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Affiliation(s)
- Reyhane Toufan
- Department of Audiology, Faculty of Rehabilitation Sciences, Iran University of Medical Sciences (IUMS), Tehran, Iran
| | - Maryam Aghamolaei
- Department of Audiology, School of Rehabilitation, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hasan Ashayeri
- Department of Basic Sciences in Rehabilitation, School of Rehabilitation Sciences, Iran University of Medical Sciences (IUMS), Tehran, Iran
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21
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Davis NJ. Quantifying the trajectory of gyrification changes in the aging brain (Commentary on Madan, 2021). Eur J Neurosci 2021; 53:3634-3636. [PMID: 33817886 DOI: 10.1111/ejn.15220] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2020] [Revised: 03/18/2021] [Accepted: 03/31/2021] [Indexed: 11/27/2022]
Affiliation(s)
- Nick J Davis
- Department of Psychology, Manchester Metropolitan University, Manchester, UK
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22
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Zhu J, Chen X, Yang Y. Effects of Amateur Musical Experience on Categorical Perception of Lexical Tones by Native Chinese Adults: An ERP Study. Front Psychol 2021; 12:611189. [PMID: 33790832 PMCID: PMC8005537 DOI: 10.3389/fpsyg.2021.611189] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 02/17/2021] [Indexed: 01/29/2023] Open
Abstract
Music impacting on speech processing is vividly evidenced in most reports involving professional musicians, while the question of whether the facilitative effects of music are limited to experts or may extend to amateurs remains to be resolved. Previous research has suggested that analogous to language experience, musicianship also modulates lexical tone perception but the influence of amateur musical experience in adulthood is poorly understood. Furthermore, little is known about how acoustic information and phonological information of lexical tones are processed by amateur musicians. This study aimed to provide neural evidence of cortical plasticity by examining categorical perception of lexical tones in Chinese adults with amateur musical experience relative to the non-musician counterparts. Fifteen adult Chinese amateur musicians and an equal number of non-musicians participated in an event-related potential (ERP) experiment. Their mismatch negativities (MMNs) to lexical tones from Mandarin Tone 2–Tone 4 continuum and non-speech tone analogs were measured. It was hypothesized that amateur musicians would exhibit different MMNs to their non-musician counterparts in processing two aspects of information in lexical tones. Results showed that the MMN mean amplitude evoked by within-category deviants was significantly larger for amateur musicians than non-musicians regardless of speech or non-speech condition. This implies the strengthened processing of acoustic information by adult amateur musicians without the need of focused attention, as the detection of subtle acoustic nuances of pitch was measurably improved. In addition, the MMN peak latency elicited by across-category deviants was significantly shorter than that by within-category deviants for both groups, indicative of the earlier processing of phonological information than acoustic information of lexical tones at the pre-attentive stage. The results mentioned above suggest that cortical plasticity can still be induced in adulthood, hence non-musicians should be defined more strictly than before. Besides, the current study enlarges the population demonstrating the beneficial effects of musical experience on perceptual and cognitive functions, namely, the effects of enhanced speech processing from music are not confined to a small group of experts but extend to a large population of amateurs.
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Affiliation(s)
- Jiaqiang Zhu
- School of Foreign Languages, Hunan University, Changsha, China
| | - Xiaoxiang Chen
- School of Foreign Languages, Hunan University, Changsha, China
| | - Yuxiao Yang
- Foreign Studies College, Hunan Normal University, Changsha, China
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23
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The influence of different types of auditory change on processes associated with the switching of attention in younger and older adults. Neurobiol Aging 2020; 96:197-204. [DOI: 10.1016/j.neurobiolaging.2020.09.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 08/24/2020] [Accepted: 09/07/2020] [Indexed: 01/03/2023]
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Apeksha K, Kumar AU. Effect of Quiet and Noise on P300 Response in Individuals with Auditory Neuropathy Spectrum Disorder. Int Arch Otorhinolaryngol 2020; 24:e462-e471. [PMID: 33101512 PMCID: PMC7575403 DOI: 10.1055/s-0039-3402441] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Accepted: 11/04/2019] [Indexed: 10/31/2022] Open
Abstract
Introduction Auditory neuropathy spectrum disorder (ANSD) is a clinical condition in which individuals have normal cochlear responses and abnormal neural responses. There is a lack of evidence in the literature regarding the neural discrimination skill in individuals with ANSD, especially when the signal is presented in the presence of noise. Objectives The present study was performed with the aim to investigate auditory discrimination skill, in quiet and in the presence of noise, in individuals with ANSD and to compare the findings with normal-hearing individuals. Methods A total of 30 individuals with normal hearing sensitivity and 30 individuals with ANSD in the age range of 15 to 55 years old, with the mean age of 27.86 years old, were the participants. P300 response was recorded from both groups using syllable pairs /ba/-/da/ in oddball paradigm and the syllable /da/ in repetitive paradigm in quiet and at +10 dB signal-to-noise ratio (SNR). Results There was significant prolongation in latency and reaction time, and reduction in amplitude of P300 response and sensitivity in both groups with the addition of noise. The topographic pattern analysis showed activation of the central-parietal-occipital region of the brain in individuals with ANSD, whereas activation of the central-parietal region was observed in individuals with normal hearing. The activation was more diffused in individuals with ANSD compared with that of individuals with normal hearing. Conclusion The individuals with ANSD showed a significantly more adverse effect of noise on the neural discrimination skill than the normal counterpart.
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Affiliation(s)
- Kumari Apeksha
- Department of Speech and Hearing, JSS Institute of Speech & Hearing, Mysuru, India
| | - Ajith U. Kumar
- Department of Audiology, All India Institute of Speech & Hearing, Mysuru, India
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St George BV, Cone B. Perceptual and Electrophysiological Correlates of Fixed Versus Moving Sound Source Lateralization. JOURNAL OF SPEECH, LANGUAGE, AND HEARING RESEARCH : JSLHR 2020; 63:3176-3194. [PMID: 32812839 DOI: 10.1044/2020_jslhr-19-00289] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Purpose The aims of the study were (a) to evaluate the effects of systematically varied factors of stimulus duration, interaural-level difference (ILD), and direction on perceptual and electrophysiological metrics of lateralization for fixed versus moving targets and (b) to evaluate the hemispheric activity underlying perception of fixed versus moving auditory targets. Method Twelve normal-hearing, young adult listeners were evaluated using perceptual and P300 tests of lateralization. Both perceptual and P300 tests utilized stimuli that varied for type (fixed and moving), direction (right and left), duration (100 and 500 ms), and magnitude of ILD (9 and 18 dB). Listeners provided laterality judgments and stimulus-type discrimination (fixed vs. moving) judgments for all combinations of acoustic factors. During P300 recordings, listeners discriminated between left- versus right-directed targets, as the other acoustic parameters were varied. Results ILD magnitude and stimulus type had statistically significant effects on laterality ratings, with larger magnitude ILDs and fixed type resulting in greater lateralization. Discriminability between fixed versus moving targets was dependent on stimulus duration and ILD magnitude. ILD magnitude was a significant predictor of P300 amplitude. There was a statistically significant inverse relationship between the perceived velocity of targets and P300 latency. Lateralized targets evoked contralateral hemispheric P300 activity. Moreover, a right-hemisphere enhancement was observed for fixed-type lateralized deviant stimuli. Conclusions Perceptual and P300 findings indicate that lateralization of auditory movement is highly dependent on temporal integration. Both the behavioral and physiological findings of this study suggest that moving auditory targets with ecologically valid velocities are processed by the central auditory nervous system within a window of temporal integration that is greater than that for fixed auditory targets. Furthermore, these findings lend support for a left hemispatial perceptual bias and right hemispheric dominance for spatial listening.
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Affiliation(s)
| | - Barbara Cone
- Department of Speech, Language, and Hearing Sciences, The University of Arizona, Tucson
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Valderrama JT, Beach EF, Sharma M, Appaiah-Konganda S, Schmidt E. Design and evaluation of the effectiveness of a corpus of congruent and incongruent English sentences for the study of event related potentials. Int J Audiol 2020; 60:96-103. [PMID: 32720818 DOI: 10.1080/14992027.2020.1798518] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
OBJECTIVE To design and evaluate the effectiveness of a stimulus material in eliciting the N400 event related potential (ERP). DESIGN A set of 700 semantically congruent and incongruent sentences was developed in accordance with current linguistic norms, and validated with an electroencephalography (EEG) study, in which the influence of age and gender on the N400 ERP magnitude was analysed. STUDY SAMPLE Forty-five normal-hearing subjects (19-57 years, 21 females) participated in the EEG study. RESULTS The stimulus material used in the EEG study elicited a robust N400 ERP, with a morphology consistent with the literature. Results also showed no statistically significant effect of age or gender on the N400 magnitude. CONCLUSIONS The material presented in this paper constitutes the largest complete stimulus set suitable for both auditory and text-based N400 experiments. This material may help facilitate the efficient implementation of future N400 ERP studies, as well as promote standardisation and consistency across studies.
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Affiliation(s)
- Joaquin T Valderrama
- National Acoustic Laboratories, Macquarie University, Sydney, Australia.,Department of Linguistics, Macquarie University, Sydney Australia
| | - Elizabeth F Beach
- National Acoustic Laboratories, Macquarie University, Sydney, Australia
| | - Mridula Sharma
- Department of Linguistics, Macquarie University, Sydney Australia
| | | | - Elaine Schmidt
- Department of Linguistics, Macquarie University, Sydney Australia.,Department of Theoretical and Applied Linguistics, University of Cambridge, Cambridge, UK
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van der Westhuizen N, Biagio-de Jager L, Rheeder P. P300 Event-Related Potentials in Normal-Hearing Adults With Type 2 Diabetes Mellitus. Am J Audiol 2020; 29:120-128. [PMID: 32163296 DOI: 10.1044/2019_aja-19-00095] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Background P300 event-related potentials can be used to measure auditory processing speed, working memory, and attention. Purpose The purpose of the study was to compare P300 event-related potentials in normal-hearing adults with those of adults with Type II diabetes mellitus. Research Design A two-group (with diabetes and controls) comparative study (age- and sex-matched) with a nonprobability sampling method was used. Study Sample Sixty-four adult participants (32 with diabetes, 32 without diabetes) between the ages of 23 and 60 years participated. Data Collection and Analysis Pure-tone audiometry was performed to ensure participants had pure-tone averages of ≤ 25 dB HL. Folstein Mini-Mental State Examinations were conducted, which ensured absence of cognitive impairment. Blood glucose levels were measured immediately prior to P300 testing, after which amplitude and latency results were captured. Descriptive analysis was used to calculate mean, standard deviation, median, and 25th and 75th percentiles. To study differences between adults with and without diabetes as well as the effect of glucose, linear mixed-model regression analyses were performed when left and right ears were combined, and simple linear regression analyses were performed when left and right ears were analyzed separately. Results For P300 latency results, a significant statistical difference (p < .001) was observed between participants with and without diabetes (352.46 ms, SD = 36.36; 314.09 ms, SD = 32.08), respectively. A significant statistical difference (p < .001) in amplitude was observed between participants with and without diabetes, respectively (12.10 μV, SD = 3.70; 15.08 μV, SD = 2.82). Glucose was a key moderator of only amplitude after adjusting for diabetes status. Glucose had no effect on amplitude and latency for adults without Type II diabetes mellitus (DM). Conclusions Type II DM decreases amplitude and increases latency; in addition, adults with Type II DM, attention, and working memory, as denoted by P300 amplitude, may deteriorate with increased glucose levels on the day of testing.
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Affiliation(s)
| | - Leigh Biagio-de Jager
- Department of Speech-Language Pathology and Audiology, University of Pretoria, South Africa
| | - Paul Rheeder
- Department of Internal Medicine, Steve Biko Academic Hospital, University of Pretoria, South Africa
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Asadzadeh S, Yousefi Rezaii T, Beheshti S, Delpak A, Meshgini S. A systematic review of EEG source localization techniques and their applications on diagnosis of brain abnormalities. J Neurosci Methods 2020; 339:108740. [DOI: 10.1016/j.jneumeth.2020.108740] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 04/13/2020] [Accepted: 04/13/2020] [Indexed: 12/12/2022]
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29
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Hyde DE, Peters J, Warfield SK. Multi-Resolution Graph Based Volumetric Cortical Basis Functions From Local Anatomic Features. IEEE Trans Biomed Eng 2019; 66:3381-3392. [PMID: 30872218 PMCID: PMC6995658 DOI: 10.1109/tbme.2019.2904473] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE Modern clinical MRI collects millimeter scale anatomic information, but scalp electroencephalography source localization is ill posed, and cannot resolve individual sources at that resolution. Dimensionality reduction in the space of cortical sources is needed to improve computational and storage complexity, yet volumetric methods still employ simplistic grid coarsening that eliminates fine scale anatomic structure. We present an approach to extend near-arbitrary spatial scaling to volumetric localization. METHODS Starting from a voxelwise brain parcellation, sub-parcels are identified from local cortical connectivity with an iterated graph cut approach. Spatial basis functions in each parcel are constructed using either a decomposition of the local leadfield matrix or spectral basis functions of local cortical connectivity graphs. RESULTS We present quantitative evaluation with extensive simulations and use multiple sets of real data to highlight how parameter changes impact computed reconstructions. Our results show that volumetric basis functions can improve accuracy by as much as 30%, while reducing computational complexity by over two orders of magnitude. In real data from epilepsy surgical candidates, accurate localization of seizure onset regions is demonstrated. CONCLUSION Spatial dimensionality reduction with volumetric basis functions improves reconstruction accuracy while reducing computational complexity. SIGNIFICANCE Near-arbitrary spatial dimensionality reduction will enable volumetric reconstruction with modern computationally intensive algorithms and anatomically driven multi-resolution methods.
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Formisano R, Toppi J, Risetti M, Aloisi M, Contrada M, Ciurli PM, Falletta Caravasso C, Luccichenti G, Astolfi L, Cincotti F, Mattia D. Language-Related Brain Potentials in Patients With Disorders of Consciousness: A Follow-up Study to Detect “Covert” Language Disorders. Neurorehabil Neural Repair 2019; 33:513-522. [DOI: 10.1177/1545968319846123] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Background. Language disorders may occur in patients with disorders of consciousness (DoCs), and they could interfere with the behavioral assessment of consciousness and responsiveness. Objective. In this study, we retrospectively explored whether ERP N400 was eventually associated with the presence of aphasia diagnosed in those patients who had evolved into Exit-Minimally Conscious State (E-MCS) at the clinical follow-up. Methods. In this retrospective cohort study, the ERPs elicited by an auditory sentences task were retrospectively examined in a sample of 15 DoC patients diagnosed according to the Coma Recovery Scale–Revised (CRS-R). All these 15 DoC patients underwent a (at least) 1-year clinical follow-up, which included a neuropsychological evaluation to assess language function among other cognitive functions. Ten healthy individuals also underwent the same paradigm to investigate the variability of ERPs characteristics. Results. The N400 ERP component with centroparietal topography was found in 9 of 10 healthy controls in response to the ill-formed sentences. Analysis of patients’ data revealed that (1) a significant N400 component could be detected in 64% (9 of 14 patients) of the DoC patients regardless of the type of DoC; (2) no significant N400 ERP component was retrospectively detected in those E-MCS patients who showed aphasia at the follow-up; and (3) the presence/absence of the N400-ERP component was consistent with the brain lesion side and significantly predict the recovery. Conclusion. These preliminary findings indicate that the absence of N400 was significantly associated with the presence of aphasia diagnosed at the clinical follow-up in E-MCS patients.
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Affiliation(s)
| | - Jlenia Toppi
- IRCCS Fondazione Santa Lucia, Rome, Italy
- Dept. of Computer, Control and Management Engineering, Sapienza University of Rome, Rome, Italy
| | | | | | | | | | | | | | - Laura Astolfi
- IRCCS Fondazione Santa Lucia, Rome, Italy
- Dept. of Computer, Control and Management Engineering, Sapienza University of Rome, Rome, Italy
| | - Febo Cincotti
- IRCCS Fondazione Santa Lucia, Rome, Italy
- Dept. of Computer, Control and Management Engineering, Sapienza University of Rome, Rome, Italy
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31
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Morrison C, Kamal F, Campbell K, Taler V. Event-related potentials associated with auditory attention capture in younger and older adults. Neurobiol Aging 2019; 77:20-25. [DOI: 10.1016/j.neurobiolaging.2019.01.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 01/11/2019] [Accepted: 01/14/2019] [Indexed: 01/09/2023]
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Trial-by-trial surprise-decoding model for visual and auditory binary oddball tasks. Neuroimage 2019; 196:302-317. [PMID: 30980899 DOI: 10.1016/j.neuroimage.2019.04.028] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 02/26/2019] [Accepted: 04/08/2019] [Indexed: 02/02/2023] Open
Abstract
Having to survive in a continuously changing environment has driven the human brain to actively predict the future state of its surroundings. Oddball tasks are specific types of experiments in which this nature of the human brain is studied. Detailed mathematical models have been constructed to explain the brain's perception in these tasks. These models consider a subject as an ideal observer who abstracts a hypothesis from the previous stimuli, and estimates its hyper-parameters - in order to make the next prediction. The corresponding prediction error is assumed to manifest the subjective surprise of the brain. While the approach of earlier works to this problem has been to suggest an encoding model, we investigated the reverse model: if the stimuli's surprise is assumed as the cause of the observer's surprise, it must be possible to decode the surprise of each stimulus, for every single subject, given only their neural responses, i.e. to tell how unexpected a specific stimulus has been for them. Employing machine learning tools, we developed a surprise decoding model for binary oddball tasks. We constructed our model using the ideal observer proposed by Meyniel et al. in 2016, and applied it to three datasets, one with visual, one with auditory, and one with both visual and auditory stimuli. We demonstrated that our decoding model performs very well for both of the sensory modalities with or without the presence of the subject's motor response.
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Gao L, Chen J, Gu L, Shu H, Wang Z, Liu D, Yan Y, Zhang Z. Effects of Gender and Apolipoprotein E on Novelty MMN and P3a in Healthy Elderly and Amnestic Mild Cognitive Impairment. Front Aging Neurosci 2018; 10:256. [PMID: 30186155 PMCID: PMC6110901 DOI: 10.3389/fnagi.2018.00256] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Accepted: 08/03/2018] [Indexed: 01/27/2023] Open
Abstract
Background: The apolipoprotein E epsilon4 (ApoE ε4) allele and female gender may be important risk factors for the development of Alzheimer’s disease and amnestic mild cognitive impairment (aMCI). Novelty mismatch negativity (MMN) represents the pre-attentive index of deviance detection and P3a represents the attention orienting response. Furthermore, MMN and P3a components have been reported to be potential markers in aMCI. Therefore, this study will investigate the effects of gender and ApoE on auditory novelty MMN and P3a and their relationship to neuropsychological performance in aMCI. Methods: Thirty nine aMCI subjects and 44 controls underwent neuropsychological assessment and ApoE genotyping. Novelty MMN and P3a components were investigated during an auditory novelty oddball task. Results: Firstly, novelty MMN latency was significantly shorter in aMCI than in healthy control (HC) group. Secondly, novelty MMN latency was negatively correlated with episodic memory in aMCI, but not in HC. Novelty P3a latency was negatively correlated with information processing speed in all subjects. For gender effect, novelty MMN latency was shorter in aMCI females than in HC females. Moreover, novelty P3a amplitudes were lower in males than in females in both aMCI and HC. For the effect of ApoE status, novelty MMN latency was shorter in aMCI ApoE ε4- than HC ApoE ε4-. Conclusion: aMCI presents altered pre-attentive processing indexed by novelty MMN components. Furthermore, there may be a compensatory mechanism on the impaired processing in aMCI. It further suggests that aMCI female and ApoE ε4- recruited the compensatory mechanism.
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Affiliation(s)
- Lijuan Gao
- Department of Neurology, Affiliated Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Jiu Chen
- Department of Neurology, Affiliated Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Lihua Gu
- Department of Neurology, Affiliated Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Hao Shu
- Department of Neurology, Affiliated Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Zan Wang
- Department of Neurology, Affiliated Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Duan Liu
- Department of Neurology, Affiliated Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China
| | - Yanna Yan
- Department of Psychology, Xinxiang Medical University, Xinxiang, China
| | - Zhijun Zhang
- Department of Neurology, Affiliated Zhongda Hospital, School of Medicine, Southeast University, Nanjing, China.,Department of Psychology, Xinxiang Medical University, Xinxiang, China
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Melynyte S, Wang GY, Griskova-Bulanova I. Gender effects on auditory P300: A systematic review. Int J Psychophysiol 2018; 133:55-65. [PMID: 30130548 DOI: 10.1016/j.ijpsycho.2018.08.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 08/13/2018] [Accepted: 08/17/2018] [Indexed: 01/02/2023]
Abstract
The evidence suggests that gender-related effects could influence the electrophysiological P300 parameters and stand as an additional source of variation for both clinical and non-clinical subjects. The aim of this paper is to characterize gender-related differences in P300 potential as elicited with simple auditory paradigms. This knowledge (1) is important for the practical assessment of P300 potential in normal and clinical populations, and (2) can provide an insight into the understanding of gender differences in pathophysiology, particularly those with differential risk or prevalence in males and females. With this review it is shown that a limited number of studies encounter possible gender effects on parameters of auditory P300, and the findings need to be read with caution due to methodological limitations of the studies. Nevertheless, evidence supports that the P300 amplitude could be significantly modulated by gender, with greater amplitude in females relative to males. Noteworthy, gender has a minimal effect on the P300 latency, and it is often comparable between males and females. Furthermore, the effect of gender on P300 could be modulated by hormonal background, anatomy and some methodological aspects.
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Affiliation(s)
- Sigita Melynyte
- Institute of Biosciences, Life Sciences Centre, Vilnius University, Vilnius, Lithuania
| | - Grace Y Wang
- Department of Psychology, Auckland University of Technology, Auckland, New Zealand
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Lazarou I, Adam K, Georgiadis K, Tsolaki A, Nikolopoulos S, Yiannis Kompatsiaris I, Tsolaki M. Can a Novel High-Density EEG Approach Disentangle the Differences of Visual Event Related Potential (N170), Elicited by Negative Facial Stimuli, in People with Subjective Cognitive Impairment? J Alzheimers Dis 2018; 65:543-575. [PMID: 30103320 DOI: 10.3233/jad-180223] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
BACKGROUND Studies on subjective cognitive impairment (SCI) and neural activation report controversial results. OBJECTIVE To evaluate the ability to disentangle the differences of visual N170 ERP, generated by facial stimuli (Anger & Fear) as well as the cognitive deterioration of SCI, mild cognitive impairment (MCI), and Alzheimer's disease (AD) compared to healthy controls (HC). METHOD 57 people took part in this study. Images corresponding to facial stimuli of "Anger" and "Fear" were presented to 12 HC, 14 SCI, 17 MCI and 14 AD participants. EEG data were recorded by using a HD-EEG HydroCel with 256 channels. RESULTS Results showed that the amplitude of N170 can contribute in distinguishing the SCI group, since statistically significant differences were observed with the HC (p < 0.05) and the MCI group from HC (p < 0.001), as well as AD from HC (p = 0.05) during the processing of facial stimuli. Noticeable differences were also observed in the topographic distribution of the N170 amplitude, while localization analysis by using sLORETA images confirmed the activation of superior, middle-temporal, and frontal lobe brain regions. Finally, in the case of "Fear", SCI and HC demonstrated increased activation in the orbital and inferior frontal gyrus, respectively, MCI in the inferior temporal gyrus, and AD in the lingual gyrus. CONCLUSION These preliminary findings suggest that the amplitude of N170 elicited after negative facial stimuli could be modulated by the decline related to pathological cognitive aging and can contribute in distinguishing HC from SCI, MCI, and AD.
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Affiliation(s)
- Ioulietta Lazarou
- Information Technologies Institute, Centre for Research and Technology Hellas, Thessaloniki, Macedonia, Greece.,1st Department of Neurology, G.H. "AHEPA", School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
| | - Katerina Adam
- Information Technologies Institute, Centre for Research and Technology Hellas, Thessaloniki, Macedonia, Greece
| | - Kostas Georgiadis
- Information Technologies Institute, Centre for Research and Technology Hellas, Thessaloniki, Macedonia, Greece.,Informatics Department, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
| | - Anthoula Tsolaki
- Information Technologies Institute, Centre for Research and Technology Hellas, Thessaloniki, Macedonia, Greece.,Laboratory of Medical Physic, Faculty of Health Sciences, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece
| | - Spiros Nikolopoulos
- Information Technologies Institute, Centre for Research and Technology Hellas, Thessaloniki, Macedonia, Greece
| | | | - Magda Tsolaki
- Information Technologies Institute, Centre for Research and Technology Hellas, Thessaloniki, Macedonia, Greece.,1st Department of Neurology, G.H. "AHEPA", School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Macedonia, Greece.,Greek Alzheimer's Association and Related Disorders (GAADRD), Thessaloniki, Macedonia, Greece
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Sowndhararajan K, Kim M, Deepa P, Park SJ, Kim S. Application of the P300 Event-Related Potential in the Diagnosis of Epilepsy Disorder: A Review. Sci Pharm 2018; 86:scipharm86020010. [PMID: 29587468 PMCID: PMC6027667 DOI: 10.3390/scipharm86020010] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Revised: 03/22/2018] [Accepted: 03/23/2018] [Indexed: 11/16/2022] Open
Abstract
Epilepsy is one of the most serious chronical neurological disorders, affecting more than 50 million people worldwide. It can be defined as a spectrum disorder, and patients with epilepsy possess abnormalities in cognitive functions. A number of factors can cause cognitive dysfunctions in epileptic syndromes, including etiology, the age of onset, type of seizure and severity, duration, and antiepileptic drugs. Event-related potentials (ERPs) are very useful clinical and research instruments to evaluate cognitive function in patients with neuropsychiatry disorders. Event-related potentials directly reflect cortical neuronal activity and provide a particular level of temporal resolution. Among various ERP components, the P300 is the most important component for assessing cognitive processes such as attention, working memory, and concentration. Numerous studies have reported the abnormalities in amplitude or latency of P300 component of ERP in epileptic patients, and these abnormalities are indicative of cognitive dysfunction. Therefore, the purpose of this review is to consolidate the existing literature in connection with the use of P300 in epileptic patients.
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Affiliation(s)
- Kandhasamy Sowndhararajan
- School of Natural Resources and Environmental Sciences, Kangwon National University, Chuncheon 24341, Korea.
| | - Minju Kim
- School of Natural Resources and Environmental Sciences, Kangwon National University, Chuncheon 24341, Korea.
| | - Ponnuvel Deepa
- School of Natural Resources and Environmental Sciences, Kangwon National University, Chuncheon 24341, Korea.
| | - Se Jin Park
- School of Natural Resources and Environmental Sciences, Kangwon National University, Chuncheon 24341, Korea.
| | - Songmun Kim
- School of Natural Resources and Environmental Sciences, Kangwon National University, Chuncheon 24341, Korea.
- Gangwon Perfume Alchemy Ltd., Co., Chuncheon 24341, Gangwon-do, Korea.
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Pavarini SCI, Brigola AG, Luchesi BM, Souza ÉN, Rossetti ES, Fraga FJ, Guarisco LPC, Terassi M, Oliveira NA, Hortense P, Pedroso RV, Ottaviani AC. On the use of the P300 as a tool for cognitive processing assessment in healthy aging: A review. Dement Neuropsychol 2018; 12:1-11. [PMID: 29682227 PMCID: PMC5901243 DOI: 10.1590/1980-57642018dn12-010001] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
Changes in patterns of performance for the cognitive functions of memory, processing speed, and focused attention are expected in old age.
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Affiliation(s)
- Sofia Cristina Iost Pavarini
- MS, Federal University of São Carlos (UFSCar), Graduate Program in Nursing, São Carlos, SP, Brazil.,PhD, Federal University of São Carlos (UFSCar), Graduate Program in Gerontology, São Carlos, SP, Brazil.,PhD, Federal University of São Carlos (UFSCar), Gerontology Department, São Carlos, SP, Brazil
| | - Allan Gustavo Brigola
- MS, Federal University of São Carlos (UFSCar), Graduate Program in Nursing, São Carlos, SP, Brazil
| | - Bruna Moretti Luchesi
- MS, Federal University of São Carlos (UFSCar), Graduate Program in Nursing, São Carlos, SP, Brazil
| | - Érica Nestor Souza
- MS, Federal University of São Carlos (UFSCar), Graduate Program in Nursing, São Carlos, SP, Brazil
| | | | - Francisco José Fraga
- PhD, Federal University of ABC (UFABC), Engineering, Modeling and Applied Social Sciences Center (CECS), Santo André, SP, Brazil
| | | | - Marélli Terassi
- MS, Federal University of São Carlos (UFSCar), Graduate Program in Nursing, São Carlos, SP, Brazil
| | - Nathalia Alves Oliveira
- MS, Federal University of São Carlos (UFSCar), Graduate Program in Nursing, São Carlos, SP, Brazil
| | - Priscilla Hortense
- MS, Federal University of São Carlos (UFSCar), Graduate Program in Nursing, São Carlos, SP, Brazil
| | - Renata Valle Pedroso
- PhD, São Paulo State University (UNESP), Physical Activity and Aging Lab, Rio Claro, SP, Brazil
| | - Ana Carolina Ottaviani
- MS, Federal University of São Carlos (UFSCar), Graduate Program in Nursing, São Carlos, SP, Brazil
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van Dinteren R, Huster RJ, Jongsma MLA, Kessels RPC, Arns M. Differences in Cortical Sources of the Event-Related P3 Potential Between Young and Old Participants Indicate Frontal Compensation. Brain Topogr 2018; 31:35-46. [PMID: 28101703 PMCID: PMC5772121 DOI: 10.1007/s10548-016-0542-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Accepted: 12/19/2016] [Indexed: 11/01/2022]
Abstract
The event-related P3 potential, as elicited in auditory signal detection tasks, originates from neural activity of multiple cortical structures and presumably reflects an overlap of several cognitive processes. The fact that the P3 is affected by aging makes it a potential metric for age-related cognitive change. The P3 in older participants is thought to encompass frontal compensatory activity in addition to task-related processes. The current study investigates this by decomposing the P3 using group independent component analysis (ICA). Independent components (IC) of young and old participants were compared in order to investigate the effects of aging. Exact low-resolution tomography analysis (eLORETA) was used to compare current source densities between young and old participants for the P3-ICs to localize differences in cortical source activity for every IC. One of the P3-related ICs reflected a different constellation of cortical generators in older participants compared to younger participants, suggesting that this P3-IC reflects shifts in neural activations and compensatory processes with aging. This P3-IC was localized to the orbitofrontal/temporal, and the medio-parietal regions. For this IC, older participants showed more frontal activation and less parietal activation as measured on the scalp. The differences in cortical sources were localized in the precentral gyrus and the parahippocampal gyrus. This finding might reflect compensatory activity recruited from these cortical sources during a signal detection task.
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Affiliation(s)
- R van Dinteren
- Research Institute Brainclinics, Nijmegen, The Netherlands.
- Donders Institute for Brain, Cognition and Behavior, Radboud University Nijmegen, Nijmegen, The Netherlands.
| | - R J Huster
- Department of Psychology, University of Oslo, Oslo, Norway
- Psychology Clinical Neurosciences Center, University of New Mexico, Albuquerque, NM, USA
| | - M L A Jongsma
- Behavioural Science Institute, Radboud University Nijmegen, Nijmegen, The Netherlands
| | - R P C Kessels
- Donders Institute for Brain, Cognition and Behavior, Radboud University Nijmegen, Nijmegen, The Netherlands
- Department of Medical Psychology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - M Arns
- Research Institute Brainclinics, Nijmegen, The Netherlands
- Department of Experimental Psychology, Utrecht University, Utrecht, The Netherlands
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Melynyte S, Ruksenas O, Griskova-Bulanova I. Sex differences in equiprobable auditory Go/NoGo task: effects on N2 and P3. Exp Brain Res 2017; 235:1565-1574. [DOI: 10.1007/s00221-017-4911-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 02/10/2017] [Indexed: 01/01/2023]
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Khachatryan E, De Letter M, Vanhoof G, Goeleven A, Van Hulle MM. Sentence Context Prevails Over Word Association in Aphasia Patients with Spared Comprehension: Evidence from N400 Event-Related Potential. Front Hum Neurosci 2017; 10:684. [PMID: 28119590 PMCID: PMC5223168 DOI: 10.3389/fnhum.2016.00684] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Accepted: 12/22/2016] [Indexed: 11/30/2022] Open
Abstract
Behavioral and event-related potential (ERP) studies on aphasia patients showed that lexical information is not lost but rather its integration into the working context is hampered. Studies have been conducted on the processing of sentence-level information (meaningful versus meaningless) and of word-level information (related versus unrelated) in aphasia patients, but we are not aware of any study that assesses the relationship between the two. In healthy subjects the processing of a single word in a sentence context has been studied using the N400 ERP. It was shown that, even when there is only a weak expectation of a final word in a sentence, this expectation will dominate word relatedness. In order to study the effect of semantic relatedness between words in sentence processing in aphasia patients, we conducted a crossed-design ERP study, crossing the factors of word relatedness and sentence congruity. We tested aphasia patients with mild to minimum comprehension deficit and healthy young and older (age-matched with our patients) controls on a semantic anomaly judgment task when simultaneously recording EEG. Our results show that our aphasia patient’s N400 amplitudes in response to the sentences of our crossed-design study were similar to those of our age-matched healthy subjects. However, we detected an increase in the N400 ERP latency in those patients, indicating a delay in the integration of the new word into the working context. Additionally, we observed a positive correlation between comprehension level of those patients and N400 effect in response to meaningful sentences without word relatedness contrasted to meaningless sentences without word relatedness.
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Affiliation(s)
- Elvira Khachatryan
- Laboratory of Neuro- and Psychophysiology, Department of Neuroscience, KU LeuvenLeuven, Belgium; Neurology Department, Yerevan State Medical UniversityYerevan, Armenia
| | - Miet De Letter
- Department of Speech, Language and Hearing Sciences, Ghent University Ghent, Belgium
| | - Gertie Vanhoof
- Department of Speech and Language Therapy, University Hospitals Leuven Leuven, Belgium
| | - Ann Goeleven
- Department of Speech and Language Therapy, University Hospitals LeuvenLeuven, Belgium; Department of Neuroscience, KU LeuvenLeuven, Belgium
| | - Marc M Van Hulle
- Laboratory of Neuro- and Psychophysiology, Department of Neuroscience, KU Leuven Leuven, Belgium
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Abstract
The primary objective of this study was to further characterize the role of sex, if any, in event-related potentials (ERPs). More specifically, we aimed to investigate sex sensitivity with respect to the P300 ERP. Each female and male study participant underwent an oddball paradigm electroencephalography ERP session. ERP data were subjected to preprocessing and postprocessing, as well as statistical analysis. The results of the study showed that men had larger P300 amplitudes on average for both low-probability and high-probability stimuli compared with women (P<0.001). Men also showed shorter P300 latencies on average than did women (P<0.001). Significant differences in ERPs between men and women were observed in this study. The results indicate the existence of sex sensitivity to the P300 ERP, which may be because of men eliciting higher response inhibition compared with women.
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Sabeti M, Katebi SD, Rastgar K, Azimifar Z. A multi-resolution approach to localize neural sources of P300 event-related brain potential. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2016; 133:155-168. [PMID: 27393807 DOI: 10.1016/j.cmpb.2016.05.013] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Revised: 04/19/2016] [Accepted: 05/27/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND AND OBJECTIVE P300 is probably the most well-known component of event-related brain potentials (ERPs). Using an oddball paradigm, a P300 component can be identified, that is, elicited by the target stimuli recognition. Since P300 is associated with attention and memory operations of the brain, investigation of this component can improve our understanding of these mechanisms. The present study is aimed at identifying the P300 generators in 30 healthy subjects aged 18-30 years using time-reduction region-suppression linearly constrained minimum variance (TR-LCMV) beamformer. METHODS In our study, TR-LCMV beamformer with multi-resolution approach is proposed, coarse-resolution space to find the approximated coherent source locations, fine-resolution space to estimate covariance matrix for dimension reduction of determined regions, and normal-resolution space to localize the P300 generators in the brain. RESULTS Our results over simulated and real data showed that this approach is a suitable tool to the analysis of ERP fields with localizing superior and inferior frontal lobe, middle temporal gyrus, parietal lobe, and cingulate gyrus as the most prominent sources of P300. The result of P300 localization was finally compared with the other localization methods and it is demonstrated that enhanced performance is achieved. CONCLUSIONS Our results showed that the P300 originates from a widespread neuronal network in the brain and not from a specific region. Our finding over simulated and real data demonstrated the ability of the TR-LCMV algorithm for P300 source localization.
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Affiliation(s)
- M Sabeti
- Department of Computer Engineering, College of Engineering, Shiraz Branch, Islamic Azad University, Shiraz, Iran.
| | - S D Katebi
- Department of Computer Engineering, Zarghan Branch, Islamic Azad University, Zarghan, Iran
| | - K Rastgar
- Department of Physiology, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Z Azimifar
- Department of Computer Science and Engineering, Shiraz University, Shiraz, Iran
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Modulation of neurophysiological auditory processing measures by bilateral transcranial direct current stimulation in schizophrenia. Schizophr Res 2016; 174:189-191. [PMID: 27132485 DOI: 10.1016/j.schres.2016.04.021] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Revised: 04/10/2016] [Accepted: 04/15/2016] [Indexed: 11/21/2022]
Abstract
This study used bilateral transcranial direct current stimulation (tDCS) to target neural generators of auditory Mismatch Negativity (MMN) and oddball P300 in schizophrenia patients. tDCS was applied to the pre-frontal cortex in a parallel between-group design. There was a significant main effect of stimulation resulting in modulation of MMN amplitude. This effect was mainly driven by a non-significant, but large, effect-size decrease in MMN amplitude with anodal stimulation. This is the first study to demonstrate that tDCS is able to engage and modulate an EEG-based auditory processing measure in schizophrenia.
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Mikkelsen KB, Kappel SL, Mandic DP, Kidmose P. EEG Recorded from the Ear: Characterizing the Ear-EEG Method. Front Neurosci 2015; 9:438. [PMID: 26635514 PMCID: PMC4649040 DOI: 10.3389/fnins.2015.00438] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Accepted: 10/30/2015] [Indexed: 11/13/2022] Open
Abstract
HighlightsAuditory middle and late latency responses can be recorded reliably from ear-EEG. For sources close to the ear, ear-EEG has the same signal-to-noise-ratio as scalp. Ear-EEG is an excellent match for power spectrum-based analysis.
A method for measuring electroencephalograms (EEG) from the outer ear, so-called ear-EEG, has recently been proposed. The method could potentially enable robust recording of EEG in natural environments. The objective of this study was to substantiate the ear-EEG method by using a larger population of subjects and several paradigms. For rigor, we considered simultaneous scalp and ear-EEG recordings with common reference. More precisely, 32 conventional scalp electrodes and 12 ear electrodes allowed a thorough comparison between conventional and ear electrodes, testing several different placements of references. The paradigms probed auditory onset response, mismatch negativity, auditory steady-state response and alpha power attenuation. By comparing event related potential (ERP) waveforms from the mismatch response paradigm, the signal measured from the ear electrodes was found to reflect the same cortical activity as that from nearby scalp electrodes. It was also found that referencing the ear-EEG electrodes to another within-ear electrode affects the time-domain recorded waveform (relative to scalp recordings), but not the timing of individual components. It was furthermore found that auditory steady-state responses and alpha-band modulation were measured reliably with the ear-EEG modality. Finally, our findings showed that the auditory mismatch response was difficult to monitor with the ear-EEG. We conclude that ear-EEG yields similar performance as conventional EEG for spectrogram-based analysis, similar timing of ERP components, and equal signal strength for sources close to the ear. Ear-EEG can reliably measure activity from regions of the cortex which are located close to the ears, especially in paradigms employing frequency-domain analyses.
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Affiliation(s)
| | - Simon L Kappel
- Department of Engineering, Aarhus University Aarhus, Denmark
| | - Danilo P Mandic
- Department of Electrical and Electronic Engineering, Imperial College London, UK
| | - Preben Kidmose
- Department of Engineering, Aarhus University Aarhus, Denmark
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