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Pappalettera C, Miraglia F, Cacciotti A, Nucci L, Tufo G, Rossini PM, Vecchio F. The impact of virtual reality and distractors on attentional processes: insights from EEG. Pflugers Arch 2024:10.1007/s00424-024-03008-w. [PMID: 39158612 DOI: 10.1007/s00424-024-03008-w] [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: 01/09/2024] [Revised: 05/31/2024] [Accepted: 08/08/2024] [Indexed: 08/20/2024]
Abstract
Virtual reality (VR) allows to create controlled scenarios in which the quantity of stimuli can be modulated, as happen in real-life, where humans are subjected to various multisensory-often overlapping-stimuli. The present research aimed to study changes in attentional processes within an auditory oddball paradigm during a virtual exploration, while varying the amount of distractors. Twenty healthy volunteers underwent electroencephalography (EEG) during three different experimental conditions: an auditory oddball without VR (No-VR condition), an auditory oddball during VR exploration without distractors (VR-Empty condition), and an auditory oddball during VR exploration with a high level of distractors (VR-Full condition). Event-related potentials (ERPs) were computed averaging epochs of EEGs and analyzing peaks at 100 ms (N100) and 300 ms (P300) latencies. Results showed modulation of N100 amplitude in Fz and of P300 amplitude in Pz. Statistically significant differences in latency were observed only for P300 where the latency results delayed from the No-VR to VR-Full. The scalp topography revealed for P100 no significant differences between frequent and rare stimuli in either the No-VR and VR-Empty conditions. However, significant results were found in N100 in VR-Full condition. For P300, results showed differences between frequent and rare stimuli, in every condition. However, this difference is gradually less widespread from No-VR condition to the VR-Full. The emerging integration of VR with EEG may have important implications for studying brain attentional processing.
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Affiliation(s)
- Chiara Pappalettera
- Brain Connectivity Laboratory, Department of Neuroscience and Neurorehabilitation, IRCCS San Raffaele Roma, Via Val Cannuta, 247, 00166, Rome, Italy
- Department of Theoretical and Applied Sciences, eCampus University, Novedrate, Como, Italy
| | - Francesca Miraglia
- Brain Connectivity Laboratory, Department of Neuroscience and Neurorehabilitation, IRCCS San Raffaele Roma, Via Val Cannuta, 247, 00166, Rome, Italy
- Department of Theoretical and Applied Sciences, eCampus University, Novedrate, Como, Italy
| | - Alessia Cacciotti
- Brain Connectivity Laboratory, Department of Neuroscience and Neurorehabilitation, IRCCS San Raffaele Roma, Via Val Cannuta, 247, 00166, Rome, Italy
- Department of Theoretical and Applied Sciences, eCampus University, Novedrate, Como, Italy
| | - Lorenzo Nucci
- Brain Connectivity Laboratory, Department of Neuroscience and Neurorehabilitation, IRCCS San Raffaele Roma, Via Val Cannuta, 247, 00166, Rome, Italy
| | - Giulia Tufo
- Department of Basic and Applied Sciences for Engineering, Sapienza University of Rome, Rome, Italy
| | - Paolo Maria Rossini
- Brain Connectivity Laboratory, Department of Neuroscience and Neurorehabilitation, IRCCS San Raffaele Roma, Via Val Cannuta, 247, 00166, Rome, Italy
| | - Fabrizio Vecchio
- Brain Connectivity Laboratory, Department of Neuroscience and Neurorehabilitation, IRCCS San Raffaele Roma, Via Val Cannuta, 247, 00166, Rome, Italy.
- Department of Theoretical and Applied Sciences, eCampus University, Novedrate, Como, Italy.
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Ighalo J, Kirby ED, Song X, Fickling SD, Pawlowski G, Hajra SG, Liu CC, Menon C, Shah SA, Knoefel F, D'Arcy RC. Brain vital signs as a quantitative measure of cognition: Methodological implementation in a care home environment. Heliyon 2024; 10:e28982. [PMID: 38576563 PMCID: PMC10990968 DOI: 10.1016/j.heliyon.2024.e28982] [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: 09/13/2023] [Revised: 03/14/2024] [Accepted: 03/27/2024] [Indexed: 04/06/2024] Open
Abstract
Introduction Managing cognitive function in care homes is a significant challenge. Individuals in care have a variety of scores across standard clinical assessments, such as the Mini-Mental Status Exam (MMSE), and many of them have scores that fall within the range associated with dementia. A recent methodological advance, brain vital sign monitoring through auditory event-related potentials, provides an objective and sensitive physiological measurement to track abnormalities, differences, or changes in cognitive function. Taking advantage of point-of-care accessibility, the current study evaluated the methodological feasibility, the assessment of whether a particular research method can be successfully implemented, of quantitatively measuring cognition of care home residents using brain vital signs. Secondarily, the current study examined the relationship between brain vital signs, specifically the cognitive processing associated N400 component, and MMSE scores in care home residents. Materials and methods Brain vital signs used the established N100 (auditory sensation), P300 (basic attention), and N400 (cognitive processing) event-related potential (ERP) components. A total of 52 residents were enrolled, with all participants evaluated using the MMSE. Participants were assigned into homogeneous groups based on their MMSE scores, and were categorized into low (n = 14), medium (n = 17), and high (n = 13) MMSE groups. Both brain vital sign measures and underlying ERP waveforms were examined. Statistical analyses used partial least squares correlation (PLS) analyses in which both MMSE and age were included as factors, as well as jackknife approaches, to test for significant brain vital sign changes. Results The current study successfully measured and analyzed standardized, quantifiable brain vital signs in a care home setting. ERP waveform data showed specific N400 changes between MMSE groups as a function of MMSE score. PLS analyses confirmed significant MMSE-related and age-related differences in the N400 amplitude (p < 0.05, corrected). Similarly, the jackknife approach emphasized the N400 latency difference between the low and high MMSE groups. Discussion and conclusion It was possible to acquire brain vital signs measures in care home residents. Additionally, the current study evaluated brain vital signs relative to MMSE in this group. The comparison revealed significant decreasing in N400 response amplitude (cognitive processing) as a function of both MMSE score and age, as well as a slowing of N400 latency. The findings indicate that objective neurophysiological measures of impairment are detectable in care home residents across the span of MMSE scores. Direct comparison to MMSE- and age-related variables represents a critical initial step ahead of future studies that will investigate relative improvements in sensitivity, validity, reliability and related advantages of brain vital sign monitoring.
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Affiliation(s)
- Joshua Ighalo
- Simon Fraser University, Faculty of Sciences and Applied Sciences, Metro-Vancouver, Canada
- Health and Technology District, BrainNET, Metro-Vancouver, Canada
| | - Eric D. Kirby
- Simon Fraser University, Faculty of Sciences and Applied Sciences, Metro-Vancouver, Canada
- Health and Technology District, BrainNET, Metro-Vancouver, Canada
| | - Xiaowei Song
- Simon Fraser University, Faculty of Sciences and Applied Sciences, Metro-Vancouver, Canada
- Fraser Health, Surrey Memorial Hospital and Royal Columbian Hospital, Metro-Vancouver, Canada
| | - Shaun D. Fickling
- HealthTech Connex, Centre for Neurology Studies, Metro-Vancouver, Canada
| | - Gabriela Pawlowski
- Simon Fraser University, Faculty of Sciences and Applied Sciences, Metro-Vancouver, Canada
- Health and Technology District, BrainNET, Metro-Vancouver, Canada
| | - Sujoy Ghosh Hajra
- Simon Fraser University, Faculty of Sciences and Applied Sciences, Metro-Vancouver, Canada
- Florida Institute of Technology, College of Engineering and Sciences, Melbourne, FL, USA
| | - Careesa C. Liu
- Simon Fraser University, Faculty of Sciences and Applied Sciences, Metro-Vancouver, Canada
- Florida Institute of Technology, College of Engineering and Sciences, Melbourne, FL, USA
| | - Carlo Menon
- Simon Fraser University, Faculty of Sciences and Applied Sciences, Metro-Vancouver, Canada
- ETH Zurich, Department of Health Sciences and Technology, Zurich, Switzerland
| | - Sudhin A. Shah
- Department of Radiology, Weill Cornell Medicine, New York, USA
| | - Frank Knoefel
- Bruyere Research Institute, Bruyere Memory Program, Ottawa, Canada
- University of Ottawa, Faculty of Medicine, Ottawa, Canada
- Carleton University, Faculty of Engineering and Design, Ottawa, Canada
| | - Ryan C.N. D'Arcy
- Simon Fraser University, Faculty of Sciences and Applied Sciences, Metro-Vancouver, Canada
- Health and Technology District, BrainNET, Metro-Vancouver, Canada
- Fraser Health, Surrey Memorial Hospital and Royal Columbian Hospital, Metro-Vancouver, Canada
- University of British Columbia, DM Centre for Brain Health, Metro-Vancouver, Canada
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Easwaran K, Ramakrishnan K, Jeyabal SN. Classification of cognitive impairment using electroencephalography for clinical inspection. Proc Inst Mech Eng H 2024; 238:358-371. [PMID: 38366360 DOI: 10.1177/09544119241228912] [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] [Indexed: 02/18/2024]
Abstract
Impairment in cognitive skill though set-in due to various diseases, its progress is based on neuronal degeneration. In general, cognitive impairment (CI) is divided into three stages: mild, moderate and severe. Quantification of CI is important for deciding/changing therapy. Attempted in this work is to quantify electroencephalograph (EEG) signal and group it into four classes (controls and three stages of CI). After acquiring resting state EEG signal from the participants, non-local and local synchrony measures are derived from phase amplitude coupling and phase locking value. This totals to 160 features per individual for each task. Two types of classification networks are constructed. The first one is an artificial neural network (ANN) that takes derived features and gives a maximum accuracy of 85.11%. The second network is convolutional neural network (CNN) for which topographical images constructed from EEG features becomes the input dataset. The network is trained with 60% of data and then tested with remaining 40% of data. This process is performed in 5-fold technique, which yields an average accuracy of 94.75% with only 30 numbers of inputs for every individual. The result of the study shows that CNN outperforms ANN with a relatively lesser number of inputs. From this it can be concluded that this method proposes a simple task for acquiring EEG (which can be done by CI subjects) and quantifies CI stages with no overlapping between control and test group, thus making it possible for identifying early symptoms of CI.
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Affiliation(s)
- Karuppathal Easwaran
- Department of Biomedical Engineering, Rajalakshmi Engineering College, Chennai, Tamil Nadu, India
| | - Kalpana Ramakrishnan
- Department of Biomedical Engineering, Rajalakshmi Engineering College, Chennai, Tamil Nadu, India
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Kemik K, Ada E, Çavuşoğlu B, Aykaç C, Emek‐Savaş DD, Yener G. Functional magnetic resonance imaging study during resting state and visual oddball task in mild cognitive impairment. CNS Neurosci Ther 2024; 30:e14371. [PMID: 37475197 PMCID: PMC10848090 DOI: 10.1111/cns.14371] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 07/05/2023] [Accepted: 07/07/2023] [Indexed: 07/22/2023] Open
Abstract
BACKGROUND Amnestic mild cognitive impairment (aMCI) is a transitional state between normal aging and dementia, and identifying early biomarkers is crucial for disease detection and intervention. Functional magnetic resonance imaging (fMRI) has the potential to identify changes in neural activity in MCI. METHODS We investigated neural activity changes in the visual network of the aMCI patients (n:20) and healthy persons (n:17) using resting-state fMRI and visual oddball task fMRI. We used independent component analysis to identify regions of interest and compared the activity between groups using a false discovery rate correction. RESULTS Resting-state fMRI revealed increased activity in the areas that have functional connectivity with the visual network, including the right superior and inferior lateral occipital cortex, the right angular gyrus and the temporo-occipital part of the right middle temporal gyrus (p-FDR = 0.008) and decreased activity in the bilateral thalamus and caudate nuclei, which are part of the frontoparietal network in the aMCI group (p-FDR = 0.002). In the visual oddball task fMRI, decreased activity was found in the right frontal pole, the right frontal orbital cortex, the left superior parietal lobule, the right postcentral gyrus, the right posterior part of the supramarginal gyrus, the right superior part of the lateral occipital cortex, and the right angular gyrus in the aMCI group. CONCLUSION Our results suggest the alterations in the visual network are present in aMCI patients, both during resting-state and task-based fMRI. These changes may represent early biomarkers of aMCI and highlight the importance of assessing visual processing in cognitive impairment. However, future studies with larger sample sizes and longitudinal designs are needed to confirm these findings.
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Affiliation(s)
- Kerem Kemik
- Department of NeuroscienceInstitute of Health Sciences, Dokuz Eylül UniversityIzmirTurkey
| | - Emel Ada
- Department of RadiologyDokuz Eylül University Medicine FacultyIzmirTurkey
| | - Berrin Çavuşoğlu
- Department of Medical PhysicsInstitute of Health Sciences, Dokuz Eylül UniversityIzmirTurkey
| | - Cansu Aykaç
- Department of NeuroscienceInstitute of Health Sciences, Dokuz Eylül UniversityIzmirTurkey
| | | | - Görsev Yener
- Department of Neurology, Faculty of MedicineIzmir Economy UniversityİzmirTurkey
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Marin A, Turk KW, Schiloski K, Vives-Rodriguez A, Suh C, Uppal P, Dwyer B, Palumbo R, Budson AE. The Use of Event Related Potentials to Predict Amyloid PET Status Among Patients from a Memory Disorders Clinic. J Alzheimers Dis 2024; 100:1195-1208. [PMID: 38995774 DOI: 10.3233/jad-231038] [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] [Indexed: 07/14/2024]
Abstract
Background Amyloid positron emission tomography (PET) scans provide in vivo evidence of Alzheimer's disease (AD); however, their high cost limits their use in standard clinical care. Event related potentials (ERPs) may represent an inexpensive and non-invasive additional method for detecting AD pathology. Objective We investigated whether ERPs, along with neuropsychological data, serve as predictors of amyloid PET status in patients with memory complaints. Methods Veterans aged 50-100 were recruited from a memory disorders clinic. Participants underwent a neuropsychological battery and an ERP auditory oddball protocol. Twenty-eight patients had a positive amyloid PET scan, and thirty-nine patients had a negative scan. Results ERP-P200 target amplitude and P200 standard latency were predictors of amyloid PET status. When submitting to ROC analysis, P200 standard latency exhibited the highest specificity and sensitivity in predicting amyloid PET positivity, correctly classifying the amyloid PET status for 86% of patients. Conclusions ERP-P200 measures are strong indicators of amyloid-β presence in patients from a memory disorder clinic. Increased P200 amplitude and decreased P200 latency in patients with a positive amyloid PET scan may be attributed to hyperactivation of perceptual bottom-up processes compensating for AD-related synaptic loss in the fronto-parietal networks.
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Affiliation(s)
- Anna Marin
- Center for Translational Cognitive Neuroscience, VA Boston Healthcare System, Boston, MA, USA
- Department of Behavioral Neuroscience, Boston University Aram V. Chobanian & Edward Avedisian School of Medicine, Boston, MA, USA
| | - Katherine W Turk
- Center for Translational Cognitive Neuroscience, VA Boston Healthcare System, Boston, MA, USA
- Alzheimer's Disease Research Center, Boston University, Boston, MA, USA
| | - Kylie Schiloski
- Center for Translational Cognitive Neuroscience, VA Boston Healthcare System, Boston, MA, USA
| | - Ana Vives-Rodriguez
- Center for Translational Cognitive Neuroscience, VA Boston Healthcare System, Boston, MA, USA
| | - Cheongmin Suh
- Center for Translational Cognitive Neuroscience, VA Boston Healthcare System, Boston, MA, USA
| | - Prayerna Uppal
- Center for Translational Cognitive Neuroscience, VA Boston Healthcare System, Boston, MA, USA
| | - Brigid Dwyer
- Center for Translational Cognitive Neuroscience, VA Boston Healthcare System, Boston, MA, USA
- Alzheimer's Disease Research Center, Boston University, Boston, MA, USA
| | - Rocco Palumbo
- Center for Translational Cognitive Neuroscience, VA Boston Healthcare System, Boston, MA, USA
| | - Andrew E Budson
- Center for Translational Cognitive Neuroscience, VA Boston Healthcare System, Boston, MA, USA
- Alzheimer's Disease Research Center, Boston University, Boston, MA, USA
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Wei G, Tian X, Yang H, Luo Y, Liu G, Sun S, Wang X, Wen H. Adjunct Methods for Alzheimer's Disease Detection: A Review of Auditory Evoked Potentials. J Alzheimers Dis 2024; 97:1503-1517. [PMID: 38277292 DOI: 10.3233/jad-230822] [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] [Indexed: 01/28/2024]
Abstract
The auditory afferent pathway as a clinical marker of Alzheimer's disease (AD) has sparked interest in investigating the relationship between age-related hearing loss (ARHL) and AD. Given the earlier onset of ARHL compared to cognitive impairment caused by AD, there is a growing emphasis on early diagnosis and intervention to postpone or prevent the progression from ARHL to AD. In this context, auditory evoked potentials (AEPs) have emerged as a widely used objective auditory electrophysiological technique for both the clinical diagnosis and animal experimentation in ARHL due to their non-invasive and repeatable nature. This review focuses on the application of AEPs in AD detection and the auditory nerve system corresponding to different latencies of AEPs. Our objective was to establish AEPs as a systematic and non-invasive adjunct method for enhancing the diagnostic accuracy of AD. The success of AEPs in the early detection and prediction of AD in research settings underscores the need for further clinical application and study.
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Affiliation(s)
- Guoliang Wei
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
| | - Xuelong Tian
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
| | - Hong Yang
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
| | - Yinpei Luo
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
| | - Guisong Liu
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
| | - Shuqing Sun
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
| | - Xing Wang
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
| | - Huizhong Wen
- Department of Neurobiology, School of Basic Medicine, Chongqing Key Laboratory of Neurobiology, Army Medical University, Chongqing, China
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Ramachandran M, Priyadarsini N, Kar M, Behera KK. Impact of Cardiac Autonomic Dysfunction on Cognitive Event-Related Potential in Type 2 Diabetes Mellitus Patients: A Cross-Sectional Study. Indian J Endocrinol Metab 2023; 27:506-512. [PMID: 38371187 PMCID: PMC10871012 DOI: 10.4103/ijem.ijem_368_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 02/10/2023] [Accepted: 03/23/2023] [Indexed: 02/20/2024] Open
Abstract
Introduction Type 2 diabetes mellitus (T2DM) is a chronic metabolic condition that is responsible for various long-term complications. Cognitive impairment is one of the most common complications, but the underlying mechanisms are still undetermined. The autonomic imbalance is a major cause for CVS morbidity in T2DM which could also potentially affect cognition. But there is sparse data available in the literature to prove the association between autonomic dysfunction and cognitive impairment. Methodology We recruited 40 T2DM patients and 40 healthy controls. The assessment of cognitive functions was done by cognitive P300 event-related potential (ERP) and MoCA. Heart rate variability (HRV) was done to assess autonomic function. Results The P300 ERP latency in Fz, Cz and Pz sites was significantly prolonged in T2DM patients (P < 0.001). We found moderate correlation is present between P300 latency and total power (r = -0.466, P < 0.01) and LFnu (r = -0.423, P < 0.01) in T2DM patients. The total power and HbA1C show independent association with P300 latency after adjustment for confounding factors like age and duration of diabetes (P < 0.05). Conclusion As the incidence of Alzheimer's disease is rising among T2DM patients increasing their dependency, making necessary lifestyle measures at earliest to improve autonomic balance may prevent or delay the onset of cognitive decline and alleviate its consequences and improve the quality of life in T2DM patients.
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Affiliation(s)
- Madumathy Ramachandran
- Department of Physiology, Saveetha Medical College and Hospital, Chennai, Tamil Nadu, India
| | - Nibedita Priyadarsini
- Department of Physiology, All India Institute of Medical Sciences, Bhubaneswar, Odisha, India
| | - Manisha Kar
- Department of Physiology, All India Institute of Medical Sciences, Bhubaneswar, Odisha, India
| | - Kishore Kumar Behera
- Department of Endocrinology, All India Institute of Medical Sciences, Bhubaneswar, Odisha, India
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Demirayak P, Kıyı İ, İşbitiren YÖ, Yener G. Cognitive load associates prolonged P300 latency during target stimulus processing in individuals with mild cognitive impairment. Sci Rep 2023; 13:15956. [PMID: 37743392 PMCID: PMC10518304 DOI: 10.1038/s41598-023-43132-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 09/20/2023] [Indexed: 09/26/2023] Open
Abstract
Alterations in P300 amplitude and latency, as well as neuropsychological tests, are informative to detect early signs of the affected high cognitive processing in Mild Cognitive Impairment (MCI). In the present study, we examined P300 latency and amplitude elicited by visual oddball paradigm in 20 participants with MCI and age, education, and sex-matched healthy controls from frontal, central, and parietal midline electrodes. We performed a mixed-design ANOVA to compare P300 amplitude and latency between groups during target and non-target stimulus presentation. We also assessed the correlation between our electrophysiology findings and neuropsychological tests. Our results indicated that in healthy individuals P300 is elicited earlier in target stimulus processing compared to non-target stimulus processing. On the contrary, in the MCI group, P300 latency was increased during target processing compared to non-target stimulus processing. Moreover, P300 latency in target processing is prolonged in the MCI group compared to controls. Also, our correlation results showed a significant correlation between P300 peak latency and amplitude, and attention required cognitive tasks. In conclusion, our results provide evidence that high-order cognitive processes that are involved in stimulus processing slows down in individuals with MCI due to the high working memory demand for neural processing.
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Affiliation(s)
- Pinar Demirayak
- Civitan International Research Center, University of Alabama at Birmingham, 1719 6th Ave S Suite:252B, Birmingham, AL, 35233, USA.
- Department of Neurobiology, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA.
| | - İlayda Kıyı
- Department of Neurosciences, Institute of Health Sciences, Dokuz Eylül University, İzmir, Turkey
| | - Yağmur Özbek İşbitiren
- Department of Neurosciences, Institute of Health Sciences, Dokuz Eylül University, İzmir, Turkey
| | - Görsev Yener
- Brain Dynamics Multidisciplinary Research Center, Dokuz Eylül University, İzmir, Turkey
- Faculty of Medicine, İzmir University of Economics, İzmir, Turkey
- İzmir International Biomedicine and Genome Institute, Dokuz Eylül University, Izmir, Turkey
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Sanadgol N, Amini J, Beyer C, Zendedel A. Presenilin-1-Derived Circular RNAs: Neglected Epigenetic Regulators with Various Functions in Alzheimer's Disease. Biomolecules 2023; 13:1401. [PMID: 37759801 PMCID: PMC10527059 DOI: 10.3390/biom13091401] [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: 08/01/2023] [Revised: 08/28/2023] [Accepted: 09/13/2023] [Indexed: 09/29/2023] Open
Abstract
The presenilin-1 (PSEN1) gene is crucial in developing Alzheimer's disease (AD), a progressive neurodegenerative disorder and the most common cause of dementia. Circular RNAs (circRNAs) are non-coding RNA generated through back-splicing, resulting in a covalently closed circular molecule. This study aimed to investigate PSEN1-gene-derived circular RNAs (circPSEN1s) and their potential functions in AD. Our in silico analysis indicated that circPSEN1s (hsa_circ_0008521 and chr14:73614502-73614802) act as sponge molecules for eight specific microRNAs. Surprisingly, two of these miRNAs (has-mir-4668-5p and has-mir-5584-5p) exclusively interact with circPSEN1s rather than mRNA-PSEN1. Furthermore, the analysis of pathways revealed that these two miRNAs predominantly target mRNAs associated with the PI3K-Akt signaling pathway. With sponging these microRNAs, circPSEN1s were found to protect mRNAs commonly targeted by these miRNAs, including QSER1, BACE2, RNF157, PTMA, and GJD3. Furthermore, the miRNAs sequestered by circPSEN1s have a notable preference for targeting the TGF-β and Hippo signaling pathways. We also demonstrated that circPSEN1s potentially interact with FOXA1, ESR1, HNF1B, BRD4, GATA4, EP300, CBX3, PRDM9, and PPARG proteins. These proteins have a prominent preference for targeting the TGF-β and Notch signaling pathways, where EP300 and FOXA1 have the highest number of protein interactions. Molecular docking analysis also confirms the interaction of these hub proteins and Aβ42 with circPSEN1s. Interestingly, circPSEN1s-targeted molecules (miRNAs and proteins) impacted TGF-β, which served as a shared signaling pathway. Finally, the analysis of microarray data unveiled distinct expression patterns of genes influenced by circPSEN1s (WTIP, TGIF, SMAD4, PPP1CB, and BMPR1A) in the brains of AD patients. In summary, our findings suggested that the interaction of circPSEN1s with microRNAs and proteins could affect the fate of specific mRNAs, interrupt the function of unique proteins, and influence cell signaling pathways, generally TGF-β. Further research is necessary to validate these findings and gain a deeper understanding of the precise mechanisms and significance of circPSEN1s in the context of AD.
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Affiliation(s)
- Nima Sanadgol
- Institute of Neuroanatomy, RWTH University Hospital Aachen, 52074 Aachen, Germany
| | - Javad Amini
- Department of Physiology and Pharmacology, School of Medicine, North Khorasan University of Medical Sciences, Bojnurd 94149-75516, Iran
| | - Cordian Beyer
- Institute of Neuroanatomy, RWTH University Hospital Aachen, 52074 Aachen, Germany
| | - Adib Zendedel
- Department of Biomedicine, Institut of Anatomy, University of Basel, 4031 Basel, Switzerland
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Wang C, Xu T, Yu W, Li T, Han H, Zhang M, Tao M. Early diagnosis of Alzheimer's disease and mild cognitive impairment based on electroencephalography: From the perspective of event related potentials and deep learning. Int J Psychophysiol 2022; 182:182-189. [DOI: 10.1016/j.ijpsycho.2022.10.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 10/21/2022] [Accepted: 10/24/2022] [Indexed: 11/06/2022]
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Treatment effects on event-related EEG potentials and oscillations in Alzheimer's disease. Int J Psychophysiol 2022; 177:179-201. [PMID: 35588964 DOI: 10.1016/j.ijpsycho.2022.05.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 05/11/2022] [Accepted: 05/12/2022] [Indexed: 11/23/2022]
Abstract
Alzheimer's disease dementia (ADD) is the most diffuse neurodegenerative disorder belonging to mild cognitive impairment (MCI) and dementia in old persons. This disease is provoked by an abnormal accumulation of amyloid-beta and tauopathy proteins in the brain. Very recently, the first disease-modifying drug has been licensed with reserve (i.e., Aducanumab). Therefore, there is a need to identify and use biomarkers probing the neurophysiological underpinnings of human cognitive functions to test the clinical efficacy of that drug. In this regard, event-related electroencephalographic potentials (ERPs) and oscillations (EROs) are promising candidates. Here, an Expert Panel from the Electrophysiology Professional Interest Area of the Alzheimer's Association and Global Brain Consortium reviewed the field literature on the effects of the most used symptomatic drug against ADD (i.e., Acetylcholinesterase inhibitors) on ERPs and EROs in ADD patients with MCI and dementia at the group level. The most convincing results were found in ADD patients. In those patients, Acetylcholinesterase inhibitors partially normalized ERP P300 peak latency and amplitude in oddball paradigms using visual stimuli. In these same paradigms, those drugs partially normalize ERO phase-locking at the theta band (4-7 Hz) and spectral coherence between electrode pairs at the gamma (around 40 Hz) band. These results are of great interest and may motivate multicentric, double-blind, randomized, and placebo-controlled clinical trials in MCI and ADD patients for final cross-validation.
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Wang Y, Huang X, Feng Y, Luo Q, He Y, Guo Q, Feng Y, Wang H, Yin S. Resting-State Electroencephalography and P300 Evidence: Age-Related Vestibular Loss as a Risk Factor Contributes to Cognitive Decline. J Alzheimers Dis 2022; 86:1107-1121. [PMID: 35213376 PMCID: PMC9108596 DOI: 10.3233/jad-215467] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Background: In recent years, there have been several meaningful advances in the understanding of the cognitive effects of vestibular loss. However, there has not yet been an investigation exploring the early biomarkers of preclinical cognitive decline in individuals with age-related vestibular loss. Objective: We aim to explore the “early biomarkers” of preclinical cognitive decline based on altered cortical activity (resting-state electroencephalography (EEG) and P300) with a multichannel EEG system in individuals with age-related vestibular loss. Method: This is a case-control study. A total of 21 patients with age-related vestibular loss (66.50±5.79 years, 13 [62% ] females), 19 patients with cognitive decline (68.42±5.82 years, 13 [68% ] females), and 21 age- and sex-matched healthy controls were recruited. All participants underwent a comprehensive battery of neuropsychological tests, audio-vestibular evaluations, resting-state EEG and P300 recordings. Results: Significant visuo-spatial, executive, and attention hypofunction were observed in the age-related vestibular group, reflected by decreased subscale scores. Reduced gamma functional connectivity between the right cuneus (Brodmann area 19, BA19) and the left superior parietal gyrus (BA7) was observed in both the age-related vestibular group and the cognitive impairment group. Smaller P300 amplitudes were observed in the age-related vestibular group (1.43±3.69μV) and cognitive impairment group (1.15±4.24μV) than in the healthy control group (3.97±2.38μV). Conclusion: Decreased P300 amplitude and functional connectivity between the right BA19 and the left BA7 were “early biomarkers” observed in individuals with age-related vestibular loss; these biomarkers may contribute to visuospatial, executive, and attention hypofunction.
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Affiliation(s)
- Ying Wang
- Department of Otolaryngology-Head and Neck Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China.,Otolaryngology Institute of Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai, China
| | - Xuan Huang
- Department of Otolaryngology-Head and Neck Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China.,Otolaryngology Institute of Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai, China
| | - Yueting Feng
- Department of Otolaryngology-Head and Neck Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China.,Otolaryngology Institute of Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai, China
| | - Qiong Luo
- Department of Otolaryngology-Head and Neck Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China.,Otolaryngology Institute of Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai, China
| | - Yemeng He
- Department of Otolaryngology-Head and Neck Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China.,Otolaryngology Institute of Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai, China
| | - Qihao Guo
- Department of Gerontology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China
| | - Yanmei Feng
- Department of Otolaryngology-Head and Neck Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China.,Otolaryngology Institute of Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai, China
| | - Hui Wang
- Department of Otolaryngology-Head and Neck Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China.,Otolaryngology Institute of Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai, China
| | - Shankai Yin
- Department of Otolaryngology-Head and Neck Surgery, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China.,Otolaryngology Institute of Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory of Sleep Disordered Breathing, Shanghai, China
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13
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Cognitive screening in HTLV-1-infected people using a self-perceived memory score and auditory P300. J Neurovirol 2022; 28:123-132. [PMID: 35167053 DOI: 10.1007/s13365-021-01044-1] [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: 07/12/2021] [Revised: 11/21/2021] [Accepted: 12/09/2021] [Indexed: 10/19/2022]
Abstract
The HTLV-1-associated myelopathy/tropical spastic paraparesis (HAM/TSP) is the most common neurological manifestation associated with human T-cell lymphotropic virus type-1 (HTLV-1) infection. Although cognitive impairment has been highlighted in the spectrum of HTLV-1 neurological manifestations, it may go unnoticed in those who do not spontaneously report it. We aimed at evaluating the applicability of a self-perceived memory score (SMS) and the cognitive event-related potential (P300) for early detection of cognitive impairment in HTLV-1-infected people. The SMS was measured by a 0-10 point numeric scale combined with a sad-happy face rating scale. The higher the number, the better was the SMS. The P300 was obtained through an oddball paradigm with a mental counting task. The participants were 15 (21.4%) individuals with HAM/TSP, 20 (28.6%) HTLV-1 asymptomatic carriers, and 35 (50%) seronegative controls. We found that SMS (p < 0.001) and P300 latency (p < 0.001) got progressively worse from the seronegative controls to the asymptomatic carriers and then to the HAM/TSP. The results that indicated cognitive impairment were SMS < 7.2 points and P300 latency > 369.0 ms. The HAM/TSP group showed the highest prevalence of altered P300 (80%) and SMS (87%). Interestingly, the asymptomatic group also presented significantly higher prevalence of altered SMS (60%) and P300 (35%) when compared to controls (< 10%). The frequency of cognitive impairment was 16 times higher in the HTLV-1 asymptomatic group and 69 times higher in the HAM/TSP group when compared to controls. The use of SMS in the medical consultation was a useful and easy-to-apply method to screen HTLV-1-infected subjects for everyday memory complaints.
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14
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Orhanbulucu F, Latifoğlu F. Detection of amyotrophic lateral sclerosis disease from event-related potentials using variational mode decomposition method. Comput Methods Biomech Biomed Engin 2021; 25:840-851. [PMID: 34602001 DOI: 10.1080/10255842.2021.1983803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
This study, it was aimed to contribute to the literature on Amyotrophic lateral sclerosis (ALS) diagnosis and Brain-Computer Interface (BCI) technologies by analyzing the electroencephalography (EEG) signals obtained as a result of visual stimuli and attention from ALS patients and healthy controls. It was observed that the success rate significantly increased both in the occipital and central regions in all classifiers, especially in the entropy features. The most successful classification was obtained with the Naïve Bayes (NB) classifier using the Morphological Features (MF) + Variational Mode Decomposition (VMD) -Entropy features at 88.89% in the occipital region and 94.44% in the central region.
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Affiliation(s)
- Fırat Orhanbulucu
- Department of Biomedical Engineering, Inonu University, Malatya, Turkey.,Department of Biomedical Engineering, Erciyes University, Kayseri, Turkey
| | - Fatma Latifoğlu
- Department of Biomedical Engineering, Erciyes University, Kayseri, Turkey
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15
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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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16
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Chen PY, Hsu HY, Chao YP, Nouchi R, Wang PN, Cheng CH. Altered mismatch response of inferior parietal lobule in amnestic mild cognitive impairment: A magnetoencephalographic study. CNS Neurosci Ther 2021; 27:1136-1145. [PMID: 34347358 PMCID: PMC8446215 DOI: 10.1111/cns.13691] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 05/16/2021] [Accepted: 05/20/2021] [Indexed: 12/31/2022] Open
Abstract
Background Mismatch negativity (MMN) reflects the functional integrity of sensory memory function. With the advantages of independence of individual's focused attention and behavioral cooperation, this neurophysiological signal is particularly suitable for investigating elderly with cognitive decline such as amnestic mild cognitive impairment (aMCI). However, the existing results remain substantially inconsistent whether these patients show deficits of MMN. In order to reconcile the previous disputes, the present study used magnetoencephalography combined with distributed source imaging methods to determine the source‐level magnetic mismatch negativity (MMNm) in aMCI. Methods A total of 26 healthy controls (HC) and 26 patients with aMCI underwent an auditory oddball paradigm during the MEG recordings. MMNm amplitudes and latencies in the bilateral superior temporal gyrus, inferior frontal gyrus, and inferior parietal lobule (IPL) were compared between HC and aMCI groups. The correlations of MMNm responses with performance of auditory/verbal memory tests were examined. Finally, MMNm and its combination with verbal/auditory memory tests were submitted to receiver operating characteristic (ROC) curve analysis. Results Compared to HC, patients with aMCI showed significantly delayed MMNm latencies in the IPL. Among the patients with aMCI, longer MMNm latencies of left IPL were associated with lower scores of Chinese Version Verbal Learning Test (CVVLT). The ROC curve analysis revealed that the combination of MMNm latencies of left IPL and CVVLT scores yielded a moderate accuracy in the discrimination of aMCI from HC at an individual level. Conclusions Our data suggest dysfunctional MMNm in patients with aMCI, particularly in the IPL.
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Affiliation(s)
- Pin-Yu Chen
- Department of Occupational Therapy and Graduate Institute of Behavioral Sciences, Chang Gung University, Taoyuan, Taiwan.,Laboratory of Brain Imaging and Neural Dynamics (BIND Lab), Chang Gung University, Taoyuan, Taiwan
| | - Hui-Yun Hsu
- Department of Occupational Therapy and Graduate Institute of Behavioral Sciences, Chang Gung University, Taoyuan, Taiwan.,Laboratory of Brain Imaging and Neural Dynamics (BIND Lab), Chang Gung University, Taoyuan, Taiwan
| | - Yi-Ping Chao
- Graduate Institute of Biomedical Engineering, Chang Gung University, Taoyuan, Taiwan.,Department of Neurology, Chang Gung Memorial Hospital, Linkou, Taiwan
| | - Rui Nouchi
- Institute of Development, Aging and Cancer (IDAC), Tohoku University, Sendai, Japan.,Smart Aging Research Center (S.A.R.C), Tohoku University, Sendai, Japan
| | - Pei-Ning Wang
- Division of General Neurology, Department of Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan.,Department of Neurology, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Chia-Hsiung Cheng
- Department of Occupational Therapy and Graduate Institute of Behavioral Sciences, Chang Gung University, Taoyuan, Taiwan.,Laboratory of Brain Imaging and Neural Dynamics (BIND Lab), Chang Gung University, Taoyuan, Taiwan.,Healthy Aging Research Center, Chang Gung University, Taoyuan, Taiwan.,Department of Psychiatry, Chang Gung Memorial Hospital, Linkou, Taiwan
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17
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McWilliams EC, Barbey FM, Dyer JF, Islam MN, McGuinness B, Murphy B, Nolan H, Passmore P, Rueda-Delgado LM, Buick AR. Feasibility of Repeated Assessment of Cognitive Function in Older Adults Using a Wireless, Mobile, Dry-EEG Headset and Tablet-Based Games. Front Psychiatry 2021; 12:574482. [PMID: 34276428 PMCID: PMC8281974 DOI: 10.3389/fpsyt.2021.574482] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 03/18/2021] [Indexed: 02/01/2023] Open
Abstract
Access to affordable, objective and scalable biomarkers of brain function is needed to transform the healthcare burden of neuropsychiatric and neurodegenerative disease. Electroencephalography (EEG) recordings, both resting and in combination with targeted cognitive tasks, have demonstrated utility in tracking disease state and therapy response in a range of conditions from schizophrenia to Alzheimer's disease. But conventional methods of recording this data involve burdensome clinic visits, and behavioural tasks that are not effective in frequent repeated use. This paper aims to evaluate the technical and human-factors feasibility of gathering large-scale EEG using novel technology in the home environment with healthy adult users. In a large field study, 89 healthy adults aged 40-79 years volunteered to use the system at home for 12 weeks, 5 times/week, for 30 min/session. A 16-channel, dry-sensor, portable wireless headset recorded EEG while users played gamified cognitive and passive tasks through a tablet application, including tests of decision making, executive function and memory. Data was uploaded to cloud servers and remotely monitored via web-based dashboards. Seventy-eight participants completed the study, and high levels of adherence were maintained throughout across all age groups, with mean compliance over the 12-week period of 82% (4.1 sessions per week). Reported ease of use was also high with mean System Usability Scale scores of 78.7. Behavioural response measures (reaction time and accuracy) and EEG components elicited by gamified stimuli (P300, ERN, Pe and changes in power spectral density) were extracted from the data collected in home, across a wide range of ages, including older adult participants. Findings replicated well-known patterns of age-related change and demonstrated the feasibility of using low-burden, large-scale, longitudinal EEG measurement in community-based cohorts. This technology enables clinically relevant data to be recorded outside the lab/clinic, from which metrics underlying cognitive ageing could be extracted, opening the door to potential new ways of developing digital cognitive biomarkers for disorders affecting the brain.
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Affiliation(s)
| | | | - John F. Dyer
- Cumulus Neuroscience Ltd, Belfast, United Kingdom
| | | | - Bernadette McGuinness
- Centre for Public Health, School of Medicine, Dentistry and Biomedical Sciences, Queen's University Belfast, Belfast, United Kingdom
| | - Brian Murphy
- Cumulus Neuroscience Ltd, Dublin, Ireland
- School of Electronics, Electrical Engineering and Computer Science, Queen's University Belfast, Belfast, United Kingdom
| | - Hugh Nolan
- Cumulus Neuroscience Ltd, Dublin, Ireland
| | - Peter Passmore
- Centre for Public Health, School of Medicine, Dentistry and Biomedical Sciences, Queen's University Belfast, Belfast, United Kingdom
| | - Laura M. Rueda-Delgado
- Cumulus Neuroscience Ltd, Dublin, Ireland
- Trinity Centre for Biomedical Engineering, Trinity College, The University of Dublin, Dublin, Ireland
| | - Alison R. Buick
- Cumulus Neuroscience Ltd, Belfast, United Kingdom
- School of Electronics, Electrical Engineering and Computer Science, Queen's University Belfast, Belfast, United Kingdom
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18
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Canipe LG, Sioda M, Cheatham CL. Diversity of the gut-microbiome related to cognitive behavioral outcomes in healthy older adults. Arch Gerontol Geriatr 2021; 96:104464. [PMID: 34174489 DOI: 10.1016/j.archger.2021.104464] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 05/24/2021] [Accepted: 06/12/2021] [Indexed: 12/18/2022]
Abstract
With the aging of the United States population, age-related cognitive disorders will be more prevalent and will negatively impact society. Differences in factors within and among individuals that influence cognitive decline complicate studies on the topic. One difference among individuals - gut microbiome diversity and composition - changes within the person across their lifespan and varies among individuals. An individual's gut microflora can significantly influence gut-brain communication, brain function, and behavior. Little research has been done to evaluate the gut-brain relation in non-clinical populations, with no previous studies, to our knowledge, in healthy older adults. In the present study, we investigated the relation between microbiome diversity and cognitive decline. The researchers invited sixty-three healthy older adults between 67-83 years of age to provide a fecal sample and complete an electrophysiological assessment of brain potentials (Event-Related Potentials; ERP) and the Cambridge Neuropsychological Test Automated Battery (CANTAB). Electrophysiological and behavioral data were related to alpha diversity, a measure of the variety of species in the gut-microbiome, supporting the hypothesis that a relation exists between gut microbial diversity and cognitive performance in healthy older adults as measured by CANTAB and ERP. To our knowledge, this study is the first to demonstrate the association between ERP outcomes and the gut-microbiome. Our results begin to bridge the gap in our understanding of the connection between behavior and the composition of the gut-microbiome, commonly referred to as the gut-brain connection.
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Affiliation(s)
- L Grant Canipe
- Department of Psychology and Neuroscience, University of North Carolina at Chapel Hill, 235 E. Cameron Avenue Chapel Hill, NC 27599-3270; Department of Psychology & Human Service, Elon University, 100 Campus Drive, CB 2337, Elon, NC 27244.
| | - Michael Sioda
- Department of Bioinformatics and Genomics, The University of North Carolina at Charlotte, Bioinformatics Building, 9201 University City Blvd., Charlotte, NC 28223-0001.
| | - Carol L Cheatham
- University of North Carolina at Chapel Hill Nutrition Research Institute, 500 Laureate Way, Rm 1101, Kannapolis NC, USA; Department of Psychology and Neuroscience, University of North Carolina at Chapel Hill, 235 E. Cameron Avenue Chapel Hill, NC 27599-3270.
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19
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Jiménez EC, Sierra-Marcos A, Romeo A, Hashemi A, Leonovych O, Bustos Valenzuela P, Solé Puig M, Supèr H. Altered Vergence Eye Movements and Pupil Response of Patients with Alzheimer's Disease and Mild Cognitive Impairment During an Oddball Task. J Alzheimers Dis 2021; 82:421-433. [PMID: 34024820 DOI: 10.3233/jad-201301] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
BACKGROUND Alzheimer's disease (AD) is characterized by progressive deterioration of cognitive functions and may be preceded by mild cognitive impairment (MCI). Evidence shows changes in pupil and vergence responses related to cognitive processing of visual information. OBJECTIVE Here we test the hypothesis that MCI and AD are associated with specific patterns in vergence and pupil responses. METHODS We employed a visual oddball task. In the distractor condition (80%of the trials), a blue stimulus was presented whereas in the target condition (20%of trials) it was red. Participants (23 Controls, 33 MCI patients, and 18 AD patients) were instructed to press a button when a target appeared. RESULTS Participants briefly converged their eyes 200 ms after stimulus presentation. In controls, this transient peak response was followed by a delay response to targets but not to distractor stimuli. In the patient groups, delay responses to distractors were noticed. Consequently, the differential vergence response was strong in the control group, weak in the MCI group, and absent in the AD group. Pupils started to dilate 500-600 ms after the appearance of a target but slightly contracted after the presentation of a distractor. This differential pupil response was strongest in the AD group. CONCLUSION Our findings support the idea of a role of vergence and pupil responses in attention and reveal altered responses in MCI and AD patients. Further studies should assess the value of vergence and pupil measurements as an objective support tool for early diagnosis of AD.
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Affiliation(s)
- Elizabeth Carolina Jiménez
- Department of Cognition, Development and Educational Psychology, University of Barcelona, Barcelona, Spain.,University of Guadalajara, Jalisco, México
| | - Alba Sierra-Marcos
- Department of Neurology and Neurophysiology, Hospital Sanitas CIMA, Barcelona, Spain
| | - August Romeo
- Department of Cognition, Development and Educational Psychology, University of Barcelona, Barcelona, Spain
| | - Amin Hashemi
- Department of Cognition, Development and Educational Psychology, University of Barcelona, Barcelona, Spain
| | - Oleksii Leonovych
- Department of Cognition, Development and Educational Psychology, University of Barcelona, Barcelona, Spain.,Braingaze SL, Mataró, Spain
| | - Patricia Bustos Valenzuela
- Department of Cognition, Development and Educational Psychology, University of Barcelona, Barcelona, Spain
| | - Maria Solé Puig
- Department of Cognition, Development and Educational Psychology, University of Barcelona, Barcelona, Spain
| | - Hans Supèr
- Department of Cognition, Development and Educational Psychology, University of Barcelona, Barcelona, Spain.,Institute of Neurosciences of the University of Barcelona (UBNeuro), Barcelona, Spain.,Braingaze SL, Mataró, Spain.,Catalan Institution for Research and Advanced Studies (ICREA), Barcelona, Spain
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20
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Susana CF, Mónica L, Fernando D. Event-related brain potential indexes provide evidence for some decline in healthy people with subjective memory complaints during target evaluation and response inhibition processing. Neurobiol Learn Mem 2021; 182:107450. [PMID: 33933631 DOI: 10.1016/j.nlm.2021.107450] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 04/06/2021] [Accepted: 04/27/2021] [Indexed: 11/29/2022]
Abstract
In the preclinical stage of the Alzheimer's disease (AD) continuum, subjects report subjective memory complaints (SMCs), although with the absence of any objective decline, and have a higher risk of progressing to dementia than the general population. Early identification of this stage therefore constitutes a major focus of current AD research, to enable early intervention. In this study, healthy adult participants with high and low SMCs (HSMCs and LSMCs) performed a Go/NoGo task during electroencephalogram (EEG) recording. Relative to LSMC participants, HSMC participants performed the task slower (longer reaction times) and showed changes in the event-related potential (ERP) components associated with response preparation (lower readiness potential -RP- amplitude in the Go condition), and also related to response inhibition processes (lower N2-P3 amplitude in the NoGo condition). In addition, HSMC participants showed lower Go-N2 and NoGo-N2 peak-to-baseline amplitudes, however these results seem to be influenced by a negative tendency overlapping stimulus-related waveforms. The declines observed in this study are mostly consistent with those observed in aMCI participants, supporting the notion of the AD continuum regarding SMC state.
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21
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Tramonti Fantozzi MP, Artoni F, Di Galante M, Briscese L, De Cicco V, Bruschini L, d'Ascanio P, Manzoni D, Faraguna U, Carboncini MC. Effect of the Trigeminal Nerve Stimulation on Auditory Event-Related Potentials. Cereb Cortex Commun 2021; 2:tgab012. [PMID: 34296158 PMCID: PMC8153017 DOI: 10.1093/texcom/tgab012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 02/08/2021] [Accepted: 02/10/2021] [Indexed: 11/25/2022] Open
Abstract
Trigeminal sensorimotor activity stimulates arousal and cognitive performance, likely through activation of the locus coeruleus (LC). In this study we investigated, in normal subjects, the effects of bilateral trigeminal nerve stimulation (TNS) on the LC-dependent P300 wave, elicited by an acoustic oddball paradigm. Pupil size, a proxy of LC activity, and electroencephalographic power changes were also investigated. Before TNS/sham-TNS, pupil size did not correlate with P300 amplitude across subjects. After TNS but not sham-TNS, a positive correlation emerged between P300 amplitude and pupil size within frontal and median cortical regions. TNS also reduced P300 amplitude in several cortical areas. In both groups, before and after TNS/sham-TNS, subjects correctly indicated all the target stimuli. We propose that TNS activates LC, increasing the cortical norepinephrine release and the dependence of the P300 upon basal LC activity. Enhancing the signal-to-noise ratio of cortical neurons, norepinephrine may improve the sensory processing, allowing the subject to reach the best discriminative performance with a lower level of neural activation (i.e., a lower P300 amplitude). The study suggests that TNS could be used for improving cognitive performance in patients affected by cognitive disorders or arousal dysfunctions.
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Affiliation(s)
- Maria Paola Tramonti Fantozzi
- Department of Translational Research and of New Surgical and Medical Technologies, University of Pisa, Pisa 56123, Italy
| | - Fiorenzo Artoni
- Bertarelli Foundation Chair in Translational Neuroengineering, Center for Neuroprosthetics, Institute of Bioengineering, School of Engineering, École Polytechnique Fédérale de Lausanne, Genève 1202, Switzerland
| | | | - Lucia Briscese
- Department of Translational Research and of New Surgical and Medical Technologies, University of Pisa, Pisa 56123, Italy
| | - Vincenzo De Cicco
- Department of Translational Research and of New Surgical and Medical Technologies, University of Pisa, Pisa 56123, Italy
| | - Luca Bruschini
- Department of Surgical, Medical, Molecular Pathology and Critical Care Medicine, University of Pisa, Pisa 56123, Italy
| | - Paola d'Ascanio
- Department of Translational Research and of New Surgical and Medical Technologies, University of Pisa, Pisa 56123, Italy
| | - Diego Manzoni
- Department of Translational Research and of New Surgical and Medical Technologies, University of Pisa, Pisa 56123, Italy
| | - Ugo Faraguna
- Department of Translational Research and of New Surgical and Medical Technologies, University of Pisa, Pisa 56123, Italy
| | - Maria Chiara Carboncini
- Department of Translational Research and of New Surgical and Medical Technologies, University of Pisa, Pisa 56123, Italy
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22
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Sanches C, Stengel C, Godard J, Mertz J, Teichmann M, Migliaccio R, Valero-Cabré A. Past, Present, and Future of Non-invasive Brain Stimulation Approaches to Treat Cognitive Impairment in Neurodegenerative Diseases: Time for a Comprehensive Critical Review. Front Aging Neurosci 2021; 12:578339. [PMID: 33551785 PMCID: PMC7854576 DOI: 10.3389/fnagi.2020.578339] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 10/07/2020] [Indexed: 12/14/2022] Open
Abstract
Low birth rates and increasing life expectancy experienced by developed societies have placed an unprecedented pressure on governments and the health system to deal effectively with the human, social and financial burden associated to aging-related diseases. At present, ∼24 million people worldwide suffer from cognitive neurodegenerative diseases, a prevalence that doubles every five years. Pharmacological therapies and cognitive training/rehabilitation have generated temporary hope and, occasionally, proof of mild relief. Nonetheless, these approaches are yet to demonstrate a meaningful therapeutic impact and changes in prognosis. We here review evidence gathered for nearly a decade on non-invasive brain stimulation (NIBS), a less known therapeutic strategy aiming to limit cognitive decline associated with neurodegenerative conditions. Transcranial Magnetic Stimulation and Transcranial Direct Current Stimulation, two of the most popular NIBS technologies, use electrical fields generated non-invasively in the brain to long-lastingly enhance the excitability/activity of key brain regions contributing to relevant cognitive processes. The current comprehensive critical review presents proof-of-concept evidence and meaningful cognitive outcomes of NIBS in eight of the most prevalent neurodegenerative pathologies affecting cognition: Alzheimer's Disease, Parkinson's Disease, Dementia with Lewy Bodies, Primary Progressive Aphasias (PPA), behavioral variant of Frontotemporal Dementia, Corticobasal Syndrome, Progressive Supranuclear Palsy, and Posterior Cortical Atrophy. We analyzed a total of 70 internationally published studies: 33 focusing on Alzheimer's disease, 19 on PPA and 18 on the remaining neurodegenerative pathologies. The therapeutic benefit and clinical significance of NIBS remains inconclusive, in particular given the lack of a sufficient number of double-blind placebo-controlled randomized clinical trials using multiday stimulation regimes, the heterogeneity of the protocols, and adequate behavioral and neuroimaging response biomarkers, able to show lasting effects and an impact on prognosis. The field remains promising but, to make further progress, research efforts need to take in account the latest evidence of the anatomical and neurophysiological features underlying cognitive deficits in these patient populations. Moreover, as the development of in vivo biomarkers are ongoing, allowing for an early diagnosis of these neuro-cognitive conditions, one could consider a scenario in which NIBS treatment will be personalized and made part of a cognitive rehabilitation program, or useful as a potential adjunct to drug therapies since the earliest stages of suh diseases. Research should also integrate novel knowledge on the mechanisms and constraints guiding the impact of electrical and magnetic fields on cerebral tissues and brain activity, and incorporate the principles of information-based neurostimulation.
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Affiliation(s)
- Clara Sanches
- Cerebral Dynamics, Plasticity and Rehabilitation Group, FRONTLAB Team, CNRS UMR 7225, INSERM U 1127, Institut du Cerveau, Sorbonne Universités, Paris, France
| | - Chloé Stengel
- Cerebral Dynamics, Plasticity and Rehabilitation Group, FRONTLAB Team, CNRS UMR 7225, INSERM U 1127, Institut du Cerveau, Sorbonne Universités, Paris, France
| | - Juliette Godard
- Cerebral Dynamics, Plasticity and Rehabilitation Group, FRONTLAB Team, CNRS UMR 7225, INSERM U 1127, Institut du Cerveau, Sorbonne Universités, Paris, France
| | - Justine Mertz
- Cerebral Dynamics, Plasticity and Rehabilitation Group, FRONTLAB Team, CNRS UMR 7225, INSERM U 1127, Institut du Cerveau, Sorbonne Universités, Paris, France
| | - Marc Teichmann
- Cerebral Dynamics, Plasticity and Rehabilitation Group, FRONTLAB Team, CNRS UMR 7225, INSERM U 1127, Institut du Cerveau, Sorbonne Universités, Paris, France
- National Reference Center for Rare or Early Onset Dementias, Department of Neurology, Institute of Memory and Alzheimer’s Disease, Pitié-Salpêtrière Hospital, Assistance Publique -Hôpitaux de Paris, Paris, France
| | - Raffaella Migliaccio
- Cerebral Dynamics, Plasticity and Rehabilitation Group, FRONTLAB Team, CNRS UMR 7225, INSERM U 1127, Institut du Cerveau, Sorbonne Universités, Paris, France
- National Reference Center for Rare or Early Onset Dementias, Department of Neurology, Institute of Memory and Alzheimer’s Disease, Pitié-Salpêtrière Hospital, Assistance Publique -Hôpitaux de Paris, Paris, France
| | - Antoni Valero-Cabré
- Cerebral Dynamics, Plasticity and Rehabilitation Group, FRONTLAB Team, CNRS UMR 7225, INSERM U 1127, Institut du Cerveau, Sorbonne Universités, Paris, France
- Laboratory for Cerebral Dynamics Plasticity & Rehabilitation, Boston University School of Medicine, Boston, MA, United States
- Cognitive Neuroscience and Information Technology Research Program, Open University of Catalonia, Barcelona, Spain
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Bell KL, Lister JJ, Conter R, Harrison Bush AL, O'Brien J. Cognitive Event-Related Potential Responses Differentiate Older Adults with and without Probable Mild Cognitive Impairment. Exp Aging Res 2020; 47:145-164. [PMID: 33342371 DOI: 10.1080/0361073x.2020.1861838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Background: Older adults rarely seek cognitive assessment, but often visit other healthcare professionals (e.g., audiologists). Noninvasive clinical measures within the scopes of practice of those professions sensitive to cognitive impairment are needed. Purpose: This study examined the differences of probable mild cognitive impairment (MCI) on latency and mean amplitude of the P3b auditory event-related potential. Method: Fifty-four participants comprised two groups according to cognitive status (cognitively normal older adults [CNOA], n = 25; probable MCI, n = 29). P3b was recorded using an oddball paradigm for speech (/ba/, /da/) and non-speech (1000, 2000 Hz) stimuli. Amplitudes and latencies were compared from six electrodes (FPz, Fz, FCz, Cz, CPz, Pz) between groups across stimulus probability and type. Results: CNOA participants had larger P3b mean amplitudes for deviant stimuli than those with probable MCI. Group effects of latency were isolated to deviant stimuli at FCz only when those with unclear P3bs were included. Findings did not covary with age or education. Overall, CNOAs showed a large P3b oddball effect while those with probable MCI did not. Conclusions: P3b can be used to show electrophysiological differences between older adults with and without probable MCI. These results support the development of educational materials targeting professionals using auditory-evoked potentials.
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Affiliation(s)
- Karen L Bell
- Department of Communication Sciences and Disorders, University of South Florida , Tampa, Florida, USA
| | - Jennifer Jones Lister
- Department of Communication Sciences and Disorders, University of South Florida , Tampa, Florida, USA
| | - Rachel Conter
- Department of Communication Sciences and Disorders, University of South Florida , Tampa, Florida, USA
| | - Aryn L Harrison Bush
- Department of Communication Sciences and Disorders, University of South Florida , Tampa, Florida, USA.,Department of Brain Health and Cognition, Reliance Medical Centers , Lakeland, Florida, USA
| | - Jennifer O'Brien
- Department of Psychology, University of South Florida , Tampa, Florida, USA
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Stefanidis KB, Isbel B, Klein T, Lagopoulos J, Askew CD, Summers MJ. Reduced cerebral pressure-flow responses are associated with electrophysiological markers of attention in healthy older adults. J Clin Neurosci 2020; 81:167-172. [PMID: 33222909 DOI: 10.1016/j.jocn.2020.09.034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 08/10/2020] [Accepted: 09/13/2020] [Indexed: 11/27/2022]
Abstract
The aim of this study was to determine the effect of age on the relationship between cerebrovascular function and the neural bases of sustained attention. Twenty-seven healthy young adults (aged 18-30 years) and 24 older adults (60-75 years) underwent assessments of cerebrovascular function and sustained attention. Blood flow velocity of the middle cerebral artery was assessed via Transcranial Doppler Ultrasound, during seated rest, in response to hypocapnic breathing (cerebrovascular reactivity) and during a repeated sit-to-stand procedure (pressure-flow response). Attentional processing was assessed using the N2 and P3 components of the event-related potential during a two-tone auditory oddball task. Poorer pressure-flow responses were significantly associated with reductions in N2 and P3 amplitude in the old group (b = -0.50, p = .029 and b = -0.46, p = .045), but not the young group. These results suggest that alterations in the brain's capacity to combat reductions in perfusion pressure are associated with age-related differences in attentional processing, supporting the hypothesis that cerebrovascular hemodynamic disturbances play a role in age-related cognitive decline.
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Affiliation(s)
- Kayla B Stefanidis
- Sunshine Coast Mind and Neuroscience - Thompson Institute, University of the Sunshine Coast, Birtinya, QLD, Australia.
| | - Ben Isbel
- Sunshine Coast Mind and Neuroscience - Thompson Institute, University of the Sunshine Coast, Birtinya, QLD, Australia
| | - Timo Klein
- Vasoactive Group, School of Health & Sport Sciences, University of the Sunshine Coast, Sippy Downs, QLD, Australia
| | - Jim Lagopoulos
- Sunshine Coast Mind and Neuroscience - Thompson Institute, University of the Sunshine Coast, Birtinya, QLD, Australia
| | - Christopher D Askew
- Vasoactive Group, School of Health & Sport Sciences, University of the Sunshine Coast, Sippy Downs, QLD, Australia; Sunshine Coast Health Institute, Sunshine Coast Hospital and Health Service, Australia
| | - Mathew J Summers
- Discipline of Psychology, School of Social Sciences, University of the Sunshine Coast, Sippy Downs, QLD, Australia
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Auditory event-related potentials in individuals with subjective and mild cognitive impairment. Behav Brain Res 2020; 391:112700. [DOI: 10.1016/j.bbr.2020.112700] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 04/19/2020] [Accepted: 05/08/2020] [Indexed: 12/11/2022]
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Early diagnosis of Alzheimer’s disease: the role of biomarkers including advanced EEG signal analysis. Report from the IFCN-sponsored panel of experts. Clin Neurophysiol 2020; 131:1287-1310. [DOI: 10.1016/j.clinph.2020.03.003] [Citation(s) in RCA: 81] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Revised: 03/01/2020] [Accepted: 03/02/2020] [Indexed: 02/06/2023]
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Wu D, Yang CC, Chen KY, Lin YC, Wu PJ, Hsieh PH, Nakao Y, Ow MYL, Hsieh YC, Hu CJ. Hydrolyzed Chicken Extract (ProBeptigen ®) on Cognitive Function in Healthy Middle-Aged People: A Randomized Double-Blind Trial. Nutrients 2020; 12:nu12051362. [PMID: 32397609 PMCID: PMC7284526 DOI: 10.3390/nu12051362] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 05/07/2020] [Accepted: 05/09/2020] [Indexed: 12/16/2022] Open
Abstract
Cognitive decline is an important issue of global public health. Cognitive aging might begin at middle adulthood, the period particularly vulnerable to stress in lifespan. Essence of chicken (EOC) has consistently demonstrated its beneficial effects on various cognitive domains as nutritional supplementation. This study primarily aimed to examine the cognitive enhancement effects of ProBeptigen® (previously named CMI-168), hydrolyzed peptides extracted from EOC, in healthy middle-aged people under mild stress. Ninety healthy subjects were randomly assigned into the ProBeptigen® or placebo group for eight weeks. Neurocognitive assessment, event-related potentials (ERPs), and blood tests were conducted before, during, and after the treatment. The ProBeptigen® group outperformed placebo group on Logical Memory subtests of Wechsler Memory Scale-third edition (WMS-III) and Spatial Working Memory task in the Cambridge Neuropsychological Test Automated Battery (CANTAB). The anti-inflammatory effects of ProBeptigen® in humans were also confirmed, with progressively declining high-sensitivity C-reactive protein (hs-CRP) levels. Regular dietary supplementation of ProBeptigen® is suggested to improve verbal short- and long-term memory as well as spatial working memory, and reduce inflammation in middle-aged healthy individuals with stress. The effects of ProBeptigen® on cognition warrant further investigation. (NCT03612752)
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Affiliation(s)
- Dean Wu
- Department of Neurology, Shuang-Ho Hospital, Taipei Medical University, New Taipei 235, Taiwan; (D.W.); (C.-C.Y.); (K.-Y.C.); (P.-J.W.); (P.-H.H.)
- School of Medicine, College of Medicine, Taipei Medical University, Taipei 110, Taiwan;
| | - Cheng-Chang Yang
- Department of Neurology, Shuang-Ho Hospital, Taipei Medical University, New Taipei 235, Taiwan; (D.W.); (C.-C.Y.); (K.-Y.C.); (P.-J.W.); (P.-H.H.)
- Research Center for Brain and Consciousness, Taipei Medical University, Taipei 235, Taiwan
| | - Kuan-Yu Chen
- Department of Neurology, Shuang-Ho Hospital, Taipei Medical University, New Taipei 235, Taiwan; (D.W.); (C.-C.Y.); (K.-Y.C.); (P.-J.W.); (P.-H.H.)
| | - Ying-Chin Lin
- School of Medicine, College of Medicine, Taipei Medical University, Taipei 110, Taiwan;
- Department of Family Medicine, Wanfang Hospital, Taipei 116, Taiwan
| | - Pei-Jung Wu
- Department of Neurology, Shuang-Ho Hospital, Taipei Medical University, New Taipei 235, Taiwan; (D.W.); (C.-C.Y.); (K.-Y.C.); (P.-J.W.); (P.-H.H.)
| | - Pei-Hsiu Hsieh
- Department of Neurology, Shuang-Ho Hospital, Taipei Medical University, New Taipei 235, Taiwan; (D.W.); (C.-C.Y.); (K.-Y.C.); (P.-J.W.); (P.-H.H.)
| | - Yoshihiro Nakao
- Research and Development, BRAND’S Suntory Asia, Singapore 138623, Singapore; (Y.N.); (M.Y.L.O.)
| | - Mandy Y. L. Ow
- Research and Development, BRAND’S Suntory Asia, Singapore 138623, Singapore; (Y.N.); (M.Y.L.O.)
| | - Yi-Chen Hsieh
- PhD Program for Neural Regenerative Medicine, College of Medical Science and Technology, Taipei Medical University, Taipei 110, Taiwan
- Correspondence: (Y.-C.H.); (C.-J.H.)
| | - Chaur-Jong Hu
- Department of Neurology, Shuang-Ho Hospital, Taipei Medical University, New Taipei 235, Taiwan; (D.W.); (C.-C.Y.); (K.-Y.C.); (P.-J.W.); (P.-H.H.)
- School of Medicine, College of Medicine, Taipei Medical University, Taipei 110, Taiwan;
- PhD Program for Neural Regenerative Medicine, College of Medical Science and Technology, Taipei Medical University, Taipei 110, Taiwan
- Correspondence: (Y.-C.H.); (C.-J.H.)
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Kamp S. Preceding stimulus sequence effects on the oddball‐P300 in young and healthy older adults. Psychophysiology 2020; 57:e13593. [DOI: 10.1111/psyp.13593] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 02/18/2020] [Accepted: 04/06/2020] [Indexed: 11/26/2022]
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Cerebrovascular Correlates of Subclinical Attentional Disturbances in Non-stroke Cardiovascular Disease. Neuroscience 2019; 421:144-151. [PMID: 31682956 DOI: 10.1016/j.neuroscience.2019.09.035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 09/25/2019] [Accepted: 09/26/2019] [Indexed: 11/23/2022]
Abstract
Evidence suggests that cerebrovascular hemodynamic disturbances underlie cognitive deterioration secondary to cardiovascular disease (CVD), including manifestations other than stroke, but the mechanisms remain unclear. To date, the majority of studies have used neuropsychological measures validated for the detection of clinically significant cognitive decline but lack the sensitivity to accurately detect subclinical or subtle cognitive changes. The N2 and P3 components of the event-related potential are sensitive markers of attention and cognitive processing, and are valuable in the assessment of age-related cognitive changes and neurodegenerative disease. The aims of this study were to test (a) the sensitivity of N2 and P3 components in differentiating older adults with CVD from healthy controls, and (b) whether cerebrovascular hemodynamics are associated with alterations in attention in persons with non-stroke CVD. Older adults with CVD (n = 20) and healthy older adults (n = 20) without cognitive impairment or history of stroke and matched for age, were recruited. Cerebral blood flow velocity of the middle cerebral artery (MCAv) and Gosling's Pulsatility Index (PI) were assessed using Transcranial Doppler ultrasound (TCD). ERPs were elicited using a two-tone auditory oddball task. N2 amplitude was significantly reduced in the CVD group at midline frontal, central and parietal sites (p < .05, d > 0.6). No significant group differences were observed in N2 latency, P3 amplitude, or P3 latency. Further, MCAv and PI were strongly associated with N2 amplitude in the CVD group, such that greater MCAv was associated with reductions in N2 amplitude (b = -0.58, p = .018), whilst PI was associated with increases in N2 amplitude (b = 0.66, p = .006). No relationships between MCAv or PI with N2 or P3 ERP components were observed in the healthy control group. The data reported here suggest that a reduction in N2 amplitude may be an important objective indicator of subclinical cognitive and attentional alterations in non-stroke CVD, and support the notion that cerebrovascular hemodynamic disturbances play a role in the pathogenesis of cognitive deterioration secondary to non-stroke CVD.
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White AT, Merino RB, Hardin S, Kim S. Non-Invasive, Cost-Effective, Early Diagnosis of Mild Cognitive Impairment in an Outpatient Setting: Pilot Study. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2019; 2018:13-16. [PMID: 30440329 DOI: 10.1109/embc.2018.8512268] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Mild cognitive impairment (MCI) and Alzheimer's Disease (AD) affect millions worldwide, yet no curative treatments for these neuro-degenerative disorders have been developed to date. The current study aims to propose a noninvasive, cost-effective, early diagnostic protocol for individuals suffering with MCI in an outpatient setting. Elderly participants (n=11) were screened for MCI utilizing the Montreal Cognitive Assessment (MoCA) questionnaire preceding a visual stimuli task. Participants were presented with facial stimuli to elicit event related potentials (ERP) while their cortical activity was recorded utilizing electroencephalogram (EEG). Combining regional neurophysiological biomarkers into a multidimensional feature space allowed for differentiation between healthy and MCI participants based on their respective MoCA scores. This study illustrates the feasibility of recording reliable EEG in an outpatient setting while presenting a novel method for diagnosing MCI in elderly (age >60) populations.
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Rodríguez-Labrada R, Velázquez-Pérez L, Ortega-Sánchez R, Peña-Acosta A, Vázquez-Mojena Y, Canales-Ochoa N, Medrano-Montero J, Torres-Vega R, González-Zaldivar Y. Insights into cognitive decline in spinocerebellar Ataxia type 2: a P300 event-related brain potential study. CEREBELLUM & ATAXIAS 2019; 6:3. [PMID: 30873287 PMCID: PMC6399884 DOI: 10.1186/s40673-019-0097-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Accepted: 02/21/2019] [Indexed: 12/25/2022]
Abstract
BACKGROUND Cognitive decline is a common non-motor feature characterizing Spinocerebellar Ataxia type 2 (SCA2) during the prodromal stage, nevertheless a reduced number of surrogate biomarkers of these alterations have been described. OBJECTIVE To provide insights into cognitive dysfunction in SCA2 patients using P300 event-related potentials (ERP) and to evaluate these measures as biomarkers of the disease. METHODS A cross-sectional study was performed with 30 SCA2 patients, 20 preclinical carriers and 33 healthy controls, who underwent visual, auditory P300 ERPs, and neurological examinations and ataxia scoring. RESULTS SCA2 patients showed significant increase in P300 latencies and decrease of P300 amplitudes for visual and auditory stimuli, whereas preclinical carriers exhibit a less severe, but significant prolongation of P300 latencies. Multiple regression analyses disclosed a significant effect of SARA score on visual P300 abnormalities in patients as well as of the time to ataxia onset on visual P300 latencies in preclinical carriers. CONCLUSIONS This paper demonstrated the role of P300 ERP for the study of attentional, discriminative and working memory abnormalities in SCA2 patients and for the search of surrogate biomarkers from prodromal to the symptomatic stages. Moreover, our findings provide psychophysiological evidences supporting the cerebellar involvement in cognitive processes and allows us to identify promising outcome measures for future trials focusing on cognitive dysfunction.
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Affiliation(s)
- Roberto Rodríguez-Labrada
- Centre for the Research and Rehabilitation of Hereditary Ataxias, Libertad Street # 26, 80100 Holguín, Cuba
- Faculty of Sport and Physical Culture, University of Holguín, Holguín, Cuba
- Cuban Academy of Science, street no. 460, Habana Vieja, La Habana, Cuba
| | - Luis Velázquez-Pérez
- Centre for the Research and Rehabilitation of Hereditary Ataxias, Libertad Street # 26, 80100 Holguín, Cuba
- Cuban Academy of Science, street no. 460, Habana Vieja, La Habana, Cuba
- Medical University of Holguín, Lenin Avenue 1, Holguín, Cuba
| | - Ricardo Ortega-Sánchez
- Centre for the Research and Rehabilitation of Hereditary Ataxias, Libertad Street # 26, 80100 Holguín, Cuba
| | - Arnoy Peña-Acosta
- Centre for the Research and Rehabilitation of Hereditary Ataxias, Libertad Street # 26, 80100 Holguín, Cuba
| | - Yaimeé Vázquez-Mojena
- Centre for the Research and Rehabilitation of Hereditary Ataxias, Libertad Street # 26, 80100 Holguín, Cuba
- Faculty of Sport and Physical Culture, University of Holguín, Holguín, Cuba
- Cuban Academy of Science, street no. 460, Habana Vieja, La Habana, Cuba
| | - Nalia Canales-Ochoa
- Centre for the Research and Rehabilitation of Hereditary Ataxias, Libertad Street # 26, 80100 Holguín, Cuba
| | - Jacqueline Medrano-Montero
- Centre for the Research and Rehabilitation of Hereditary Ataxias, Libertad Street # 26, 80100 Holguín, Cuba
- Faculty of Sport and Physical Culture, University of Holguín, Holguín, Cuba
| | - Reidenis Torres-Vega
- Centre for the Research and Rehabilitation of Hereditary Ataxias, Libertad Street # 26, 80100 Holguín, Cuba
| | - Yanetza González-Zaldivar
- Centre for the Research and Rehabilitation of Hereditary Ataxias, Libertad Street # 26, 80100 Holguín, Cuba
- Medical University of Holguín, Lenin Avenue 1, Holguín, Cuba
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Electrophysiological assessment methodology of sensory processing dysfunction in schizophrenia and dementia of the Alzheimer type. Neurosci Biobehav Rev 2019; 97:70-84. [DOI: 10.1016/j.neubiorev.2018.09.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 09/04/2018] [Accepted: 09/05/2018] [Indexed: 12/26/2022]
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Geraldo A, Azeredo A, Pasion R, Dores AR, Barbosa F. Fostering advances to neuropsychological assessment based on the Research Domain Criteria: The bridge between cognitive functioning and physiology. Clin Neuropsychol 2018; 33:327-356. [DOI: 10.1080/13854046.2018.1523467] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Andreia Geraldo
- Faculty of Psychology and Education Sciences, University of Porto, Porto, Portugal
- School of Health, Institute Polytechnic of Porto, Porto, Portugal
| | - Andreia Azeredo
- Faculty of Psychology and Education Sciences, University of Porto, Porto, Portugal
| | - Rita Pasion
- Faculty of Psychology and Education Sciences, University of Porto, Porto, Portugal
| | - Artemisa Rocha Dores
- Faculty of Psychology and Education Sciences, University of Porto, Porto, Portugal
- School of Health, Institute Polytechnic of Porto, Porto, Portugal
| | - Fernando Barbosa
- Faculty of Psychology and Education Sciences, University of Porto, Porto, Portugal
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Zhu Y, Wu H, Qi M, Wang S, Zhang Q, Zhou L, Wang S, Wang W, Wu T, Xiao M, Yang S, Chen H, Zhang L, Zhang KC, Ma J, Wang T. Effects of a specially designed aerobic dance routine on mild cognitive impairment. Clin Interv Aging 2018; 13:1691-1700. [PMID: 30237705 PMCID: PMC6138969 DOI: 10.2147/cia.s163067] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background Mild cognitive impairment (MCI) is known as a transitional stage or phase between normal aging and dementia. In addition, it is associated with an increased risk of dementia. Research has shown that moderate-intensity exercise is associated with a decreased risk of cognitive impairment. Two recent studies demonstrated that dance interventions are associated with improved cognitive function in the elderly with MCI. Purpose We evaluated the effect of a moderate-intensity aerobic dance routine on the cognitive function in patients with MCI. Patients and methods This is a single-blind randomized controlled trial. Sixty MCI patients were randomized to receive either treatment (aerobic dance routine + usual care) or control (usual care only) for 3 months. All patients received usual care for an additional 3 months thereafter. The aerobic dance routine was a specially designed dance routine which involved cognitive effort for patients to memorize the complex movements. Wechsler memory scale-revised logical memory (WMS-R LM) and event-related evoked potentials (ERPs) P300 latency were used to assess patients’ cognitive function at baseline, 3 months, and 6 months. Results Twenty-nine patients received exercise therapy and 31 patients received usual care. Patients in the treatment group showed a greater improvement in memory (difference in WMS-R LM changes over 3 months 4.6; 95% CI 2.2, 7.0; p<0.001) and processing speed (difference in P300 latency changes over 6 months −20.0; 95% CI=−39.5, −0.4; p<0.05) compared to control. Conclusion This dance routine improves cognitive function, especially episodic memory and processing speed, in MCI patients and merits promotion in communities.
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Affiliation(s)
- Yi Zhu
- Rehabilitation Department, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China,
| | - Han Wu
- Rehabilitation Department, Nanjing Drum Tower Hospital, The Affiliated Hospital of the Medical School at Nanjing University, Nanjing, Jiangsu, China
| | - Ming Qi
- Radiology Department, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Sheng Wang
- Rehabilitation Department, Suzhou Science and Technology Town Hospital, Suzhou, Jiangsu, China
| | - Qin Zhang
- Rehabilitation Department, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China,
| | - Li Zhou
- Rehabilitation Department, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China,
| | - Shiyan Wang
- Rehabilitation Department, Zhejiang Province Hospital, Hangzhou, Zhejiang, China
| | - Wei Wang
- Neurological Department, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Ting Wu
- Neurological Department, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China
| | - Ming Xiao
- Department of Anatomy, Nanjing Medical University, Nanjing, Jiangsu, China
| | - Siyu Yang
- Neurological Department, The Second Affiliated Hospital of Wan'nan Medical College, Wuhu, Anhui, China
| | - Hong Chen
- Department of Physical Diagnosis, Nanjing Brain Hospital, Nanjing, Jiangsu, China
| | - Ling Zhang
- Rehabilitation Department, Suzhou Science and Technology Town Hospital, Suzhou, Jiangsu, China
| | - Kathryn Chu Zhang
- Dalla Lana School of Public Health, University of Toronto, ON, Canada
| | - Jinhui Ma
- School of Epidemiology, Public Health and Preventive Medicine, University of Ottawa, Ottawa, ON, Canada.,Children's Hospital of Eastern Ontario Research Institute, Ottawa, ON, Canada
| | - Tong Wang
- Rehabilitation Department, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China,
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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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Kim M, Kwak YB, Lee TY, Kwon JS. Modulation of Electrophysiology by Transcranial Direct Current Stimulation in Psychiatric Disorders: A Systematic Review. Psychiatry Investig 2018; 15:434-444. [PMID: 29695150 PMCID: PMC5976006 DOI: 10.30773/pi.2018.01.10] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 11/15/2017] [Accepted: 01/10/2018] [Indexed: 01/03/2023] Open
Abstract
OBJECTIVE Transcranial direct current stimulation (tDCS) is a non-invasive neuromodulation technique increasingly used to relieve symptoms of psychiatric disorders. Electrophysiologic markers, such as electroencephalography (EEG) and event-related potentials (ERP), have high temporal resolution sensitive to detect plastic changes of the brain associated with symptomatic improvement following tDCS application. METHODS We performed systematic review to identify electrophysiological markers that reflect tDCS effects on plastic brain changes in psychiatric disorders. A total of 638 studies were identified by searching PubMed, Embase, psychINFPO. Of these, 21 full-text articles were assessed eligible and included in the review. RESULTS Although the reviewed studies were heterogeneous in their choices of tDCS protocols, targeted electrophysiological markers, and disease entities, their results strongly support EEG/ERPs to sensitively reflect plastic brain changes and the associated symptomatic improvement following tDCS. CONCLUSION EEG/ERPs may serve a potent tool in revealing the mechanisms underlying psychiatric symptoms, as well as in localizing the brain area targeted for stimulation. Future studies in each disease entities employing consistent tDCS protocols and electrophysiological markers would be necessary in order to substantiate and further elaborate the findings of studies included in the present systematic review.
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Affiliation(s)
- Minah Kim
- Department of Psychiatry, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Yoo Bin Kwak
- Department of Brain and Cognitive Sciences, Seoul National University College of Natural Science, Seoul, Republic of Korea
| | - Tae Young Lee
- Department of Neuropsychiatry, Seoul National University Hospital, Seoul, Republic of Korea
| | - Jun Soo Kwon
- Department of Psychiatry, Seoul National University College of Medicine, Seoul, Republic of Korea
- Department of Brain and Cognitive Sciences, Seoul National University College of Natural Science, Seoul, Republic of Korea
- Department of Neuropsychiatry, Seoul National University Hospital, Seoul, Republic of Korea
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Altered Neurocognitive Processing of Tactile Stimuli in Patients with Complex Regional Pain Syndrome. THE JOURNAL OF PAIN 2018; 19:395-409. [DOI: 10.1016/j.jpain.2017.11.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 10/06/2017] [Accepted: 11/27/2017] [Indexed: 11/18/2022]
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Weissberger GH, Strong JV, Stefanidis KB, Summers MJ, Bondi MW, Stricker NH. Diagnostic Accuracy of Memory Measures in Alzheimer's Dementia and Mild Cognitive Impairment: a Systematic Review and Meta-Analysis. Neuropsychol Rev 2017; 27:354-388. [PMID: 28940127 PMCID: PMC5886311 DOI: 10.1007/s11065-017-9360-6] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Accepted: 08/16/2017] [Indexed: 11/26/2022]
Abstract
With an increasing focus on biomarkers in dementia research, illustrating the role of neuropsychological assessment in detecting mild cognitive impairment (MCI) and Alzheimer's dementia (AD) is important. This systematic review and meta-analysis, conducted in accordance with PRISMA (Preferred Reporting Items for Systematic reviews and Meta-Analyses) standards, summarizes the sensitivity and specificity of memory measures in individuals with MCI and AD. Both meta-analytic and qualitative examination of AD versus healthy control (HC) studies (n = 47) revealed generally high sensitivity and specificity (≥ 80% for AD comparisons) for measures of immediate (sensitivity = 87%, specificity = 88%) and delayed memory (sensitivity = 89%, specificity = 89%), especially those involving word-list recall. Examination of MCI versus HC studies (n = 38) revealed generally lower diagnostic accuracy for both immediate (sensitivity = 72%, specificity = 81%) and delayed memory (sensitivity = 75%, specificity = 81%). Measures that differentiated AD from other conditions (n = 10 studies) yielded mixed results, with generally high sensitivity in the context of low or variable specificity. Results confirm that memory measures have high diagnostic accuracy for identification of AD, are promising but require further refinement for identification of MCI, and provide support for ongoing investigation of neuropsychological assessment as a cognitive biomarker of preclinical AD. Emphasizing diagnostic test accuracy statistics over null hypothesis testing in future studies will promote the ongoing use of neuropsychological tests as Alzheimer's disease research and clinical criteria increasingly rely upon cerebrospinal fluid (CSF) and neuroimaging biomarkers.
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Affiliation(s)
- Gali H Weissberger
- Brain, Behavior, and Aging Research Center, VA Greater Los Angeles Healthcare System, Los Angeles, CA, USA
- Psychology Service, VA Boston Healthcare System, Boston, MA, USA
| | - Jessica V Strong
- Psychology Service, VA Boston Healthcare System, Boston, MA, USA
- New England Geriatric Research, Education and Clinical Center (GRECC), Boston VA Healthcare System, Boston, MA, USA
| | - Kayla B Stefanidis
- Sunshine Coast Mind and Neuroscience - Thompson Institute, University of the Sunshine Coast, Sippy Downs, Queensland, Australia
| | - Mathew J Summers
- Sunshine Coast Mind and Neuroscience - Thompson Institute, University of the Sunshine Coast, Sippy Downs, Queensland, Australia
| | - Mark W Bondi
- VA San Diego Healthcare System, San Diego, CA, USA
- Department of Psychiatry, University of California San Diego, La Jolla, CA, USA
| | - Nikki H Stricker
- Psychology Service, VA Boston Healthcare System, Boston, MA, USA.
- Department of Psychiatry and Psychology, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA.
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Nitta E, Onoda K, Ishitobi F, Okazaki R, Mishima S, Nagai A, Yamaguchi S. Enhanced Feedback-Related Negativity in Alzheimer's Disease. Front Hum Neurosci 2017; 11:179. [PMID: 28503138 PMCID: PMC5408015 DOI: 10.3389/fnhum.2017.00179] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 03/27/2017] [Indexed: 01/08/2023] Open
Abstract
Alzheimer’s disease (AD), the most common cause of dementia in the elderly, results in the impairment of executive function, including that of performance monitoring. Feedback-related negativity (FRN) is an electrophysiological measure reflecting the activity of this monitoring system via feedback signals, and is generated from the anterior cingulate cortex. However, there have been no reports on FRN in AD. Based on prior aging studies, we hypothesized that FRN would decrease in AD patients. To assess this, FRN was measured in healthy individuals and those with AD during a simple gambling task involving positive and negative feedback stimuli. Contrary to our hypothesis, FRN amplitude increased in AD patients, compared with the healthy elderly. We speculate that this may reflect the existence of a compensatory mechanism against the decline in executive function. Also, there was a significant association between FRN amplitude and depression scores in AD, and the FRN amplitude tended to increase insomuch as the Self-rating Depression Scale (SDS) was higher. This result suggests the existence of a negative bias in the affective state in AD. Thus, the impaired functioning monitoring system in AD is a more complex phenomenon than we thought.
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Affiliation(s)
- Eri Nitta
- Central Clinical Laboratory, Shimane University HospitalIzumo, Japan
| | - Keiichi Onoda
- Department of Neurology, Shimane University Faculty of MedicineIzumo, Japan
| | - Fuminori Ishitobi
- Central Clinical Laboratory, Shimane University HospitalIzumo, Japan
| | - Ryota Okazaki
- Central Clinical Laboratory, Shimane University HospitalIzumo, Japan
| | - Seiji Mishima
- Central Clinical Laboratory, Shimane University HospitalIzumo, Japan
| | - Atsushi Nagai
- Central Clinical Laboratory, Shimane University HospitalIzumo, Japan
| | - Shuhei Yamaguchi
- Department of Neurology, Shimane University Faculty of MedicineIzumo, Japan
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Parameters of the P300 Potential in Mild Neurocognitive Disorders of Different Etiologies. NEUROPHYSIOLOGY+ 2017. [DOI: 10.1007/s11062-017-9618-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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41
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López Zunini RA, Knoefel F, Lord C, Breau M, Sweet L, Goubran R, Taler V. P300 amplitude alterations during inhibitory control in persons with Mild Cognitive Impairment. Brain Res 2016; 1646:241-248. [DOI: 10.1016/j.brainres.2016.06.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 06/01/2016] [Accepted: 06/03/2016] [Indexed: 11/15/2022]
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Ambrosini A, Kisialiou A, Coppola G, Finos L, Magis D, Pierelli F, Schoenen J. Visual and auditory cortical evoked potentials in interictal episodic migraine: An audit on 624 patients from three centres. Cephalalgia 2016; 37:1126-1134. [DOI: 10.1177/0333102416665224] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Background Many studies report a habituation deficit of visual evoked potentials (VEP) and/or increased intensity dependence of auditory evoked cortical potentials (IDAP) in episodic migraine patients between attacks. These findings have a pathophysiological interest, but their diagnostic utility is not known. Aims To perform an audit on a large database of interictal VEP and IDAP recordings in episodic migraine patients and evaluate their diagnostic accuracy. Methods We pooled data for VEP habituation and IDAP measured in 624 episodic migraineurs (EM) and 360 healthy volunteers (HV) from three centers. Thresholds were calculated by Receiver Operating Curve analysis and used to calculate sensitivity, specificity, positive and negative likelihood ratios (LR+ and LR-) and the accuracy of each test, using ICHD diagnostic criteria as the gold standard. Results In EM, VEP habituation was significantly lower than in HV, and IDAP slopes were significantly steeper. VEP (five blocks of 50 responses), VEP (six blocks of 100 responses) and IDAP had respectively 61.0%, 61.4% and 45.7% sensitivity, and 77.9%, 77.9% and 87.2% specificity. Their positive (LR+) and negative (LR-) likelihood ratios were respectively 2.760, 2.778, 3.570 and 0.500, 0.495, 0.623, with diagnostic accuracies of 65.3%, 69.0% and 54.3%. In combined VEP + IDAP recordings, an abnormality of at least one test had 83.4% sensitivity, 66.7% specificity, 2.504 LR+, 0.249 LR− and 81.1% accuracy. Conclusions In this large database, VEP habituation is significantly reduced and IDAP increased in episodic migraine patients between attacks. Taken alone, neither VEP nor IDAP has sufficient diagnostic accuracy. However, when both tests are performed in the same patient, an abnormality of at least one of them is highly predictive of interictal episodic migraine.
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Affiliation(s)
| | - Aliaksei Kisialiou
- Clinical and Molecular Epidemiology Unit, IRCCS San Raffaele Pisana, Rome, Italy
| | - Gianluca Coppola
- Department of Neurophysiology of Vision and Neurophthalmology, GB Bietti Foundation IRCCS, Rome, Italy
| | - Livio Finos
- Department of Developmental Psychology and Socialization, University of Padua, Italy
| | | | - Francesco Pierelli
- Headache Unit, IRCCS Neuromed, Pozzilli, IS, Italy
- Sapienza University of Rome Polo Pontino, Department of Medico-Surgical Sciences and Biotechnologies, Latina, Italy
| | - Jean Schoenen
- Headache Research Unit, University Dept of Neurology, Citadelle Hospital, Liège, Belgium
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Deiber MP, Meziane HB, Hasler R, Rodriguez C, Toma S, Ackermann M, Herrmann F, Giannakopoulos P. Attention and Working Memory-Related EEG Markers of Subtle Cognitive Deterioration in Healthy Elderly Individuals. J Alzheimers Dis 2016; 47:335-49. [PMID: 26401557 DOI: 10.3233/jad-150111] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Future treatments of Alzheimer's disease need the identification of cases at high risk at the preclinical stage of the disease before the development of irreversible structural damage. We investigated here whether subtle cognitive deterioration in a population of healthy elderly individuals could be predicted by EEG signals at baseline under cognitive activation. Continuous EEG was recorded in 97 elderly control subjects and 45 age-matched mild cognitive impairment (MCI) cases during a simple attentional and a 2-back working memory task. Upon 18-month neuropsychological follow-up, the final sample included 55 stable (sCON) and 42 deteriorated (dCON) controls. We examined the P1, N1, P3, and PNwm event-related components as well as the oscillatory activities in the theta (4-7 Hz), alpha (8-13 Hz), and beta (14-25 Hz) frequency ranges (ERD/ERS: event-related desynchronization/synchronization, and ITC: inter-trial coherence). Behavioral performance, P1, and N1 components were comparable in all groups. The P3, PNwm, and all oscillatory activity indices were altered in MCI cases compared to controls. Only three EEG indices distinguished the two control groups: alpha and beta ERD (dCON > sCON) and beta ITC (dCON < sCON). These findings show that subtle cognitive deterioration has no impact on EEG indices associated with perception, discrimination, and working memory processes but mostly affects attention, resulting in an enhanced recruitment of attentional resources. In addition, cognitive decline alters neural firing synchronization at high frequencies (14-25 Hz) at early stages, and possibly affects lower frequencies (4-13 Hz) only at more severe stages.
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Affiliation(s)
- Marie-Pierre Deiber
- INSERM U1039, Faculty of Medicine, La Tronche, France.,Biomarkers of Vulnerability Unit, Department of Mental Health and Psychiatry, University Hospitals of Geneva, Geneva, Switzerland
| | - Hadj Boumediene Meziane
- Biomarkers of Vulnerability Unit, Department of Mental Health and Psychiatry, University Hospitals of Geneva, Geneva, Switzerland
| | - Roland Hasler
- Biomarkers of Vulnerability Unit, Department of Mental Health and Psychiatry, University Hospitals of Geneva, Geneva, Switzerland
| | - Cristelle Rodriguez
- Division of General Psychiatry, Department of Mental Health and Psychiatry, University Hospitals of Geneva, Geneva, Switzerland
| | - Simona Toma
- Division of General Psychiatry, Department of Mental Health and Psychiatry, University Hospitals of Geneva, Geneva, Switzerland
| | - Marine Ackermann
- Division of General Psychiatry, Department of Mental Health and Psychiatry, University Hospitals of Geneva, Geneva, Switzerland
| | - François Herrmann
- Division of Geriatrics, Department of Internal Medicine, Rehabilitation and Geriatrics, University Hospitals of Geneva, Geneva, Switzerland
| | - Panteleimon Giannakopoulos
- Division of General Psychiatry, Department of Mental Health and Psychiatry, University Hospitals of Geneva, Geneva, Switzerland
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Tsai CL, Pai MC, Ukropec J, Ukropcová B. The Role of Physical Fitness in the Neurocognitive Performance of Task Switching in Older Persons with Mild Cognitive Impairment. J Alzheimers Dis 2016; 53:143-59. [DOI: 10.3233/jad-151093] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Chia-Liang Tsai
- Institute of Physical Education, Health and Leisure Studies, National Cheng Kung University, Taiwan, R.O.C
| | - Ming-Chyi Pai
- Department of Neurology, Division of Behavioral Neurology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Taiwan, R.O.C
- Alzheimer’s Disease Research Center, National Cheng Kung University Hospital, Taiwan, R.O.C
| | - Jozef Ukropec
- Institute of Experimental Endocrinology, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Barbara Ukropcová
- Institute of Experimental Endocrinology, Biomedical Research Center, Slovak Academy of Sciences, Bratislava, Slovakia
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Ochoa JF, Ruiz M, Valle D, Duque J, Tobon C, Alonso JF, Hernandez AM, Mananas MA. Neurophysiological correlates in Mild Cognitive Impairment detected using group Independent Component Analysis. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2016; 2015:7442-5. [PMID: 26738012 DOI: 10.1109/embc.2015.7320112] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Alzheimer's disease is the most prevalent cause of dementia. Mild Cognitive Impairment (MCI) is defined as a grey area between intact cognitive functioning and clinical dementia. Electroencephalography (EEG) has been used to identify biomarkers in dementia. Currently, there is a great interest in translating the study from raw signals to signal generators, trying to keep the relationship with neurophysiology. In the current study, EEG recordings during an encoding task were acquired in MCI subjects and healthy controls. Data was decomposed using group Independent Component Analysis (gICA) and the most neuronal components were analyzed using Phase Intertrial Coherence (PIC) and Phase shift Intertrial Coherence (PsIC). MCI subjects exhibited an increase of PIC in the theta band, while controls showed increase in PsIC in the alpha band. Correlation between PIC and PsIC and clinical scales were also found. Those findings indicate that the methodology proposed based in gICA can help to extract information from EEG recordings with neurophysiological meaning.
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46
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Weinberg A, Liu H, Shankman SA. Blunted neural response to errors as a trait marker of melancholic depression. Biol Psychol 2015; 113:100-7. [PMID: 26638761 DOI: 10.1016/j.biopsycho.2015.11.012] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 10/21/2015] [Accepted: 11/24/2015] [Indexed: 01/18/2023]
Abstract
Identification of biomarkers of vulnerability for Major Depressive Disorder is a high priority, but heterogeneity of the diagnosis can hinder research. Biomarkers of vulnerability should also be present in the absence of the diagnosis. The present study examined the magnitude of the error-related negativity (ERN), an event-related potential component following errors in a sample with remitted melancholic depression (N=17), remitted non-melancholic depression (N=33), and healthy controls (N=55). Remitted melancholic depression was uniquely characterized by a blunted ERN relative to the other two groups. Individuals with remitted non-melancholic depression did not differ from controls in the magnitude of the ERN. This was the case despite the fact that the melancholic and non-melancholic groups did not differ in course or severity of their past illnesses, or in their current functioning. Results suggest that the blunted ERN may be a viable vulnerability marker for melancholia.
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Affiliation(s)
| | - Huiting Liu
- University of Illinois at Chicago, United States
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Prehn K, Flöel A. Potentials and limits to enhance cognitive functions in healthy and pathological aging by tDCS. Front Cell Neurosci 2015; 9:355. [PMID: 26441526 PMCID: PMC4568338 DOI: 10.3389/fncel.2015.00355] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Accepted: 08/24/2015] [Indexed: 11/18/2022] Open
Abstract
Transcranial direct current stimulation (tDCS) is a non-invasive brain stimulation technique that is increasingly used in research and clinical settings to enhance the effects of cognitive training. In our present review, we will first summarize studies using tDCS alone and in combination with cognitive training in older adults and patients with Alzheimer’s dementia (AD). We will also review one study (Meinzer et al., 2014c) that showed an improvement in cognitive performance during anodal tDCS over the left inferior frontal cortex in patients with mild cognitive impairment (MCI) which is regarded as a prodromal stage of AD. Although promising short-term results have been reported, evidence from randomized controlled trials (RCTs) with sufficient sample sizes is scarce. In addition, stimulation protocols (in terms of intensity, duration, and repetition of stimulation) that lead to sustained improvements in outcome measures relevant for daily life still remain to be established. Following, we will discuss modulating factors such as technical parameters as well as the question whether there are specific cognitive functions (e.g., learning, memory consolidation, executive control) which are more amenable to tDCS enhancement than others. Finally, we will highlight future directions and limitations in this field and emphasize the need to conduct RCTs to establish efficacy of interventions for activities of daily life for a given patient population.
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Affiliation(s)
- Kristin Prehn
- Department of Neurology and NeuroCure Clinical Research Center, Charité Universitätsmedizin Berlin Berlin, Germany
| | - Agnes Flöel
- Department of Neurology and NeuroCure Clinical Research Center, Charité Universitätsmedizin Berlin Berlin, Germany
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Tang H, Huang J, Nie K, Gan R, Wang L, Zhao J, Huang Z, Zhang Y, Wang L. Cognitive profile of Parkinson's disease patients: a comparative study between early-onset and late-onset Parkinson's disease. Int J Neurosci 2015; 126:227-34. [DOI: 10.3109/00207454.2015.1010646] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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49
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Sundgren M, Nikulin VV, Maurex L, Wahlin Å, Piehl F, Brismar T. P300 amplitude and response speed relate to preserved cognitive function in relapsing–remitting multiple sclerosis. Clin Neurophysiol 2015; 126:689-97. [DOI: 10.1016/j.clinph.2014.07.024] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Revised: 06/16/2014] [Accepted: 07/14/2014] [Indexed: 10/24/2022]
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50
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Faria CDA, Alves HVD, Charchat-Fichman H. The most frequently used tests for assessing executive functions in aging. Dement Neuropsychol 2015; 9:149-155. [PMID: 29213956 PMCID: PMC5619353 DOI: 10.1590/1980-57642015dn92000009] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Accepted: 04/18/2015] [Indexed: 01/01/2024] Open
Abstract
There are numerous neuropsychological tests for assessing executive functions in aging, which vary according to the different domains assessed. OBJECTIVE To present a systematic review of the most frequently used instruments for assessing executive functions in older adults with different educational levels in clinical and experimental research. METHODS We searched for articles published in the last five years, using the PubMed database with the following terms: "neuropsychological tests", "executive functions", and "mild cognitive impairment". There was no language restriction. RESULTS 25 articles fulfilled all the inclusion criteria. The seven neuropsychological tests most frequently used to evaluate executive functions in aging were:[1] Trail Making Test (TMT) Form B;[2] Verbal Fluency Test (VFT) - F, A and S;[3] VFT Animals category;[4] Clock Drawing Test (CDT);[5] Digits Forward and Backward subtests (WAIS-R or WAIS-III);[6] Stroop Test; and[7] Wisconsin Card Sorting Test (WCST) and its variants. The domains of executive functions most frequently assessed were: mental flexibility, verbal fluency, planning, working memory, and inhibitory control. CONCLUSION The study identified the tests and domains of executive functions most frequently used in the last five years by research groups worldwide to evaluate older adults. These results can direct future research and help build evaluation protocols for assessing executive functions, taking into account the different educational levels and socio-demographic profiles of older adults in Brazil.
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