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Tamaru Y, Matsushita F, Matsugi A. Tests of abnormal gaze behavior increase the accuracy of mild cognitive impairment assessments. Sci Rep 2024; 14:19512. [PMID: 39174695 PMCID: PMC11341758 DOI: 10.1038/s41598-024-70657-3] [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: 10/19/2023] [Accepted: 08/20/2024] [Indexed: 08/24/2024] Open
Abstract
Tests to detect mild cognitive impairment (MCI) should have high sensitivity and accuracy. Previously, we reported on a cognitive composition test (CCT) that we developed to detect MCI. In this study, we compared gaze behavior parameters, namely, gaze fixation duration and gaze-shift frequency, during the CCT in participants with MCI and healthy controls (HC) to determine whether these parameters would accurately detect MCI in older adults. Participants performed CCT-A, -B, and -C tasks with varying difficulty levels while wearing eye-tracking devices. Performance time, gaze fixation duration, and gaze-shift frequency were analyzed. Receiver operating characteristic curve analysis was performed to assess the identification accuracy. The MCI group was significantly slower in completing the CCT-C task and had a higher gaze-shift frequency into both the sample object space and workspace than the HC group. Gaze fixation duration in the sample object space increased in the MCI group as the CCT became difficult. Our findings indicated that combining the CCT with performance time and gaze pattern improved the accuracy of distinguishing between individuals with and without MCI and that patients with MCI have abnormal gaze behavior during cognitive tasks. Therefore, evaluation of gaze parameters may improve the accuracy of identifying patients with MCI.
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Affiliation(s)
- Yoshiki Tamaru
- Faculty of Rehabilitation, Morinomiya University of Medical Sciences, 1-26-16 Nankokita, Suminoe-ku, Osaka-shi, Osaka, 559-8611, Japan.
| | - Futoshi Matsushita
- Faculty of Rehabilitation, Morinomiya University of Medical Sciences, 1-26-16 Nankokita, Suminoe-ku, Osaka-shi, Osaka, 559-8611, Japan
| | - Akiyoshi Matsugi
- Faculty of Rehabilitation, Shijonawate-Gakuen University, Hojo 5-11-10, Daito-shi, Osaka, 574-0011, Japan
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2
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Boujelbane MA, Trabelsi K, Salem A, Ammar A, Glenn JM, Boukhris O, AlRashid MM, Jahrami H, Chtourou H. Eye Tracking During Visual Paired-Comparison Tasks: A Systematic Review and Meta-Analysis of the Diagnostic Test Accuracy for Detecting Cognitive Decline. J Alzheimers Dis 2024; 99:207-221. [PMID: 38640158 DOI: 10.3233/jad-240028] [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: 04/21/2024]
Abstract
Background Alzheimer's disease and mild cognitive impairment (MCI) progress silently, making early diagnosis challenging, especially in less educated populations. The visual paired comparison (VPC) task, utilizing eye-tracking movement (ETM) technology, offers a promising alternative for early detection of memory decline. Objective This systematic review and meta-analysis evaluated the efficacy of the VPC task, utilizing ETM as a tool for assessing age-related cognitive changes. Methods A comprehensive search across five databases and grey literature focused on healthy and impaired memory participants assessed through the ETM-based VPC task. The primary outcomes were novelty preference scores and eye movement metrics. The risk of bias of the included studies was assessed using the Quality Assessment of Diagnostic Accuracy Studies 2 (QUADAS-2). Random-effects meta-analyses calculated Hedges' g effect size. Sensitivity and specificity of the VPC were meta-analytically pooled. Results The systematic review included 12 articles, involving 1,022 participants (aged 18 to 90 years, with education ranging from 6.5 to 20.0 years), with a low risk of bias and minimal applicability concerns across all items. Five studies contributed to the meta-analysis, revealing a significant effect favoring the VPC task for recognition memory detection (k = 9, g = -1.03). Pooled sensitivity and specificity analyses demonstrated VPC effectiveness as a recognition memory assessment tool (0.84 and 0.75, respectively). Conclusions The VPC task, utilizing ETM, may serve as a biomarker for early memory decline detection. Its use as a digital eye-tracking tool presents a possible alternative to traditional tests, warranting further research for application in neurodegenerative disease diagnosis.
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Affiliation(s)
- Mohamed Ali Boujelbane
- High Institute of Sport and Physical Education of Sfax, University of Sfax, Sfax, Tunisia
- Research Unit, Physical Activity, Sport, and Health, UR18JS01, National Observatory of Sport, Tunis, Tunisia
- Department of Training and Movement Science, Institute of Sport Science, Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Khaled Trabelsi
- High Institute of Sport and Physical Education of Sfax, University of Sfax, Sfax, Tunisia
- Research Laboratory: Education, Motricity, Sport and Health, EM2S, LR19JS01, High Institute of Sport and Physical Education of Sfax, University of Sfax, Sfax, Tunisia
- SIESTA Research Group, School of Allied Health, Human Services and Sport, La Trobe University, Melbourne, VIC, Australia
| | - Atef Salem
- High Institute of Sport and Physical Education of Sfax, University of Sfax, Sfax, Tunisia
- Research Unit, Physical Activity, Sport, and Health, UR18JS01, National Observatory of Sport, Tunis, Tunisia
- Department of Training and Movement Science, Institute of Sport Science, Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Achraf Ammar
- High Institute of Sport and Physical Education of Sfax, University of Sfax, Sfax, Tunisia
- Department of Training and Movement Science, Institute of Sport Science, Johannes Gutenberg-University Mainz, Mainz, Germany
- Research Laboratory, Molecular Bases of Human Pathology, LR19ES13, Faculty of Medicine of Sfax, University of Sfax, Sfax, Tunisia
- Interdisciplinary Laboratory in Neurosciences, Physiology, and Psychology: Physical Activity, Health, and Learning (LINP2), UFR STAPS (Faculty of Sport Sciences), UPL, Paris Nanterre University, Nanterre, France
| | - Jordan M Glenn
- Department of Health, Exercise Science Research Center Human Performance and Recreation, University of Arkansas, Fayetteville, AR, USA
| | - Omar Boukhris
- SIESTA Research Group, School of Allied Health, Human Services and Sport, La Trobe University, Melbourne, VIC, Australia
- Sport, Performance, and Nutrition Research Group, School of Allied Health, Human Services and Sport, La Trobe University, Melbourne, VIC, Australia
| | - Maha M AlRashid
- Clinical Pharmacy Department, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Haitham Jahrami
- Ministry of Health, Manama, Bahrain
- Department of Psychiatry, College of Medicine and Medical Sciences, Arabian Gulf University, Manama, Bahrain
| | - Hamdi Chtourou
- High Institute of Sport and Physical Education of Sfax, University of Sfax, Sfax, Tunisia
- Research Unit, Physical Activity, Sport, and Health, UR18JS01, National Observatory of Sport, Tunis, Tunisia
- SIESTA Research Group, School of Allied Health, Human Services and Sport, La Trobe University, Melbourne, VIC, Australia
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3
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He X, Selesnick I, Zhu M. Research Progress of Eye Movement Analyses and its Detection Algorithms in Alzheimer's Disease. Curr Alzheimer Res 2024; 21:91-100. [PMID: 38661033 DOI: 10.2174/0115672050300564240416074025] [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: 01/04/2024] [Revised: 03/29/2024] [Accepted: 03/29/2024] [Indexed: 04/26/2024]
Abstract
Alzheimer's disease (AD) has been considered one of the most challenging forms of dementia. The earlier the people are diagnosed with AD, the easier it is for doctors to find a treatment. Based on the previous literature summarizing the research results on the relationship between eye movement and AD before 2013, this paper reviewed 34 original eye movements research papers only closely related to AD published in the past ten years and pointed out that the prosaccade (4 papers) and antisaccade (5 papers) tasks, reading tasks (3 papers), visual search tasks (3 papers) are still the research objects of many researchers, Some researchers have looked at King-Devick tasks (2 papers), reading tasks (3 papers) and special tasks (8 papers), and began to use combinations of different saccade tasks to detect the relationship between eye movement and AD, which had not been done before. These reflect the diversity of eye movement tasks and the complexity and difficulty of the relationship between eye movement and AD. On this basis, the current processing and analysis methods of eye movement datasets are analyzed and discussed in detail, and we note that certain key data that may be especially important for the early diagnosis of AD by using eye movement studies cannot be miss-classified as noise and removed. Finally, we note that the development of methods that can accurately denoise and classify and quickly process massive eye movement data is quite significant for detecting eye movements in early diagnosis of AD.
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Affiliation(s)
- Xueying He
- School of Electronic Information and Communications, Huazhong University of Science and Technology, Wuhan, Hubei, CN, USA
- Tandon School of Engineering, New York University, Brooklyn, NY, USA
| | - Ivan Selesnick
- Tandon School of Engineering, New York University, Brooklyn, NY, USA
| | - Ming Zhu
- School of Electronic Information and Communications, Huazhong University of Science and Technology, Wuhan, Hubei, CN, USA
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4
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Zukowski LA, Brinkerhoff SA, Levin I, Herter TM, Hetrick L, Lockhart SN, Miller ME, Laurienti PJ, Kritchevsky SB, Hugenschmidt CE. Amyloid-β Deposition Predicts Grocery Shopping Performance in Older Adults Without Cognitive Impairment. J Alzheimers Dis 2024; 100:53-75. [PMID: 38820016 DOI: 10.3233/jad-231108] [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: 06/02/2024]
Abstract
Background A screening tool sensitive to Alzheimer's disease (AD) risk factors, such as amyloid-β (Aβ) deposition, and subtle cognitive changes, best elicited by complex everyday tasks, is needed. Objective To determine if grocery shopping performance could differentiate older adults at elevated risk of developing AD (OAer), older adults at low risk of developing AD (OAlr), and young adults (YA), and if amount of Aβ deposition could predict grocery shopping performance in older adults (OA). Methods Twenty-one OAer (78±5 years), 33 OAlr (78±5 years), and 28 YA (31±3 years) performed four grocery shopping trials, with the best and worst performances analyzed. Measures included trial time, number of correct items, number of grocery note fixations, and number of fixations and percentage of time fixating on the correct shelving unit, correct brand, and correct shelf. Linear mixed effects models compared measures by performance rank (best, worst) and group (OAer, OAlr, YA), and estimated the effect of Aβ deposition on measures in OA. Results Relative to their best performance, OAer and OAlr exhibited more correct shelving unit fixations and correct brand fixations during their worst performance, while YA did not. Within OA's worst performance, greater Aβ deposition was associated with a smaller percentage of time fixating on the correct shelving unit, correct shelf, and correct brand. Within OA, greater Aβ deposition was associated with more grocery note fixations. Conclusions OA with elevated Aβ deposition may exhibit subtle working memory impairments and less efficient visual search strategies while performing a cognitively demanding everyday task.
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Affiliation(s)
- Lisa A Zukowski
- Department of Physical Therapy, High Point University, High Point, NC, USA
| | - Sarah A Brinkerhoff
- Department of Neurology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Ilana Levin
- Department of Physical Therapy, High Point University, High Point, NC, USA
| | - Troy M Herter
- Department of Exercise Science, University of South Carolina, Columbia, SC, USA
| | - Lena Hetrick
- Department of Neuroscience, High Point University, High Point, NC, USA
| | - Samuel N Lockhart
- Sticht Center for Healthy Aging and Alzheimer's Prevention, Department of Internal Medicine, Section on Gerontology and Geriatric Medicine, Wake Forest University School of Medicine, Winston-Salem, NC, USA
| | - Michael E Miller
- Division of Public Health Sciences, Wake Forest University School of Medicine, Winston-Salem, NC, USA
| | - Paul J Laurienti
- Department of Radiology, Wake Forest University School of Medicine, Winston-Salem, NC, USA
| | - Stephen B Kritchevsky
- Sticht Center for Healthy Aging and Alzheimer's Prevention, Department of Internal Medicine, Section on Gerontology and Geriatric Medicine, Wake Forest University School of Medicine, Winston-Salem, NC, USA
| | - Christina E Hugenschmidt
- Sticht Center for Healthy Aging and Alzheimer's Prevention, Department of Internal Medicine, Section on Gerontology and Geriatric Medicine, Wake Forest University School of Medicine, Winston-Salem, NC, USA
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Baik JS, Min JH, Ko SH, Yun MS, Lee B, Kang NY, Kim B, Lee H, Shin YI. Effects of Home-Based Computerized Cognitive Training in Community-Dwelling Adults With Mild Cognitive Impairment. IEEE JOURNAL OF TRANSLATIONAL ENGINEERING IN HEALTH AND MEDICINE 2023; 12:97-105. [PMID: 38088994 PMCID: PMC10712670 DOI: 10.1109/jtehm.2023.3317189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 05/03/2023] [Accepted: 09/12/2023] [Indexed: 12/18/2023]
Abstract
OBJECTIVE There is a growing importance for the home-based (HB) support services, and computerized cognitive training (CCT) has been reported as an effective intervention for cognitive impairment. However, there is still a need for further verification of the effect of HB-CCT. This study aimed to determine the effectiveness of HB-CCT on the cognitive function of community-dwelling adults with mild cognitive impairment (MCI) as well as safety in its use. METHODS Fifty community-dwelling adults with MCI were included, of which 25 each were randomized to either HB-CCT or control groups. Evaluations of comprehensive cognition, memory, attention, language, executive function, and depression were performed before and after the intervention, including three times a week for eight weeks in the intervention group and eight weeks apart with no intervention in the control group. RESULTS In baseline and post-evaluation comparisons, the HB-CCT group showed significant improvements, while the control group did not show significant changes. Statistically significant variations were noted between the HB-CCT and control groups in all post-intervention evaluations relative to baseline. Additionally, no side effects were observed. CONCLUSION Beneficial effects on cognition and depression were noted in the intervention group compared with the control group, suggesting that HB-CCT may be a positive tool for cognitive improvement in adults with MCI.
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Affiliation(s)
- Ji Soo Baik
- Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan HospitalYangsan50612Republic of Korea
| | - Ji Hong Min
- Department of Rehabilitation MedicinePusan National University Yangsan HospitalYangsan50612Republic of Korea
| | - Sung-Hwa Ko
- Department of Rehabilitation MedicinePusan National University Yangsan HospitalYangsan50612Republic of Korea
- Department of Rehabilitation MedicineThe Graduate School of MedicinePusan National UniversityYangsan50612Republic of Korea
| | - Mi Sook Yun
- Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan HospitalYangsan50612Republic of Korea
| | - Byunghoon Lee
- Department of Rehabilitation MedicinePusan National University HospitalBusan46241Republic of Korea
| | - Nae Yoon Kang
- Department of Rehabilitation MedicinePusan National University Yangsan HospitalYangsan50612Republic of Korea
| | | | | | - Yong-Il Shin
- Department of Rehabilitation MedicinePusan National University Yangsan HospitalYangsan50612Republic of Korea
- Department of Rehabilitation MedicineThe Graduate School of MedicinePusan National UniversityYangsan50612Republic of Korea
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Zheng Y, Li T, Xie T, Zhang Y, Liu Y, Zeng X, Wang Z, Wang L, Li H, Xie Y, Lv X, Wang J, Yu X, Wang H. Characteristics and Potential Neural Substrates of Encoding and Retrieval During Memory Binding in Amnestic Mild Cognitive Impairment. J Alzheimers Dis 2023; 94:1405-1415. [PMID: 37424465 DOI: 10.3233/jad-230154] [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: 07/11/2023]
Abstract
BACKGROUND Whether encoding or retrieval failure contributes to memory binding deficit in amnestic mild cognitive impairment (aMCI) has not been elucidated. Also, the potential brain structural substrates of memory binding remained undiscovered. OBJECTIVE To investigate the characteristics and brain atrophy pattern of encoding and retrieval performance during memory binding in aMCI. METHODS Forty-three individuals with aMCI and 37 cognitively normal controls were recruited. The Memory Binding Test (MBT) was used to measure memory binding performance. The immediate and delayed memory binding indices were computed by using the free and cued paired recall scores. Partial correlation analysis was performed to map the relationship between regional gray matter volume and memory binding performance. RESULTS The memory binding performance in the learning and retrieval phases was worse in the aMCI group than in the control group (F = 22.33 to 52.16, all p < 0.001). The immediate and delayed memory binding index in the aMCI group was lower than that in the control group (p < 0.05). The gray matter volume of the left inferior temporal gyrus was positively correlated with memory binding test scores (r = 0.49 to 0.61, p < 0.05) as well as the immediate (r = 0.39, p < 0.05) and delayed memory binding index (r = 0.42, p < 0.05) in the aMCI group. CONCLUSION aMCI may be primarily characterized by a deficit in encoding phase during the controlled learning process. Volumetric losses in the left inferior temporal gyrus may contribute to encoding failure.
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Affiliation(s)
- Yaonan Zheng
- Dementia Care and Research Center, Peking University Institute of Mental Health (Sixth Hospital), Beijing, China
- National Clinical Research Center for Mental Disorders (Peking University), NHC Key Laboratory for Mental Health, Beijing, China
| | - Tao Li
- Dementia Care and Research Center, Peking University Institute of Mental Health (Sixth Hospital), Beijing, China
- National Clinical Research Center for Mental Disorders (Peking University), NHC Key Laboratory for Mental Health, Beijing, China
| | - Teng Xie
- Dementia Care and Research Center, Peking University Institute of Mental Health (Sixth Hospital), Beijing, China
- National Clinical Research Center for Mental Disorders (Peking University), NHC Key Laboratory for Mental Health, Beijing, China
| | - Ying Zhang
- Dementia Care and Research Center, Peking University Institute of Mental Health (Sixth Hospital), Beijing, China
- National Clinical Research Center for Mental Disorders (Peking University), NHC Key Laboratory for Mental Health, Beijing, China
- Beijing Anding Hospital, Capital Medical University, Beijing, China
| | - Ying Liu
- Department of Radiology, Peking University Third Hospital, Beijing, China
| | - Xiangzhu Zeng
- Department of Radiology, Peking University Third Hospital, Beijing, China
| | - Zhijiang Wang
- Dementia Care and Research Center, Peking University Institute of Mental Health (Sixth Hospital), Beijing, China
- National Clinical Research Center for Mental Disorders (Peking University), NHC Key Laboratory for Mental Health, Beijing, China
| | - Luchun Wang
- Dementia Care and Research Center, Peking University Institute of Mental Health (Sixth Hospital), Beijing, China
- National Clinical Research Center for Mental Disorders (Peking University), NHC Key Laboratory for Mental Health, Beijing, China
| | - Huizi Li
- Dementia Care and Research Center, Peking University Institute of Mental Health (Sixth Hospital), Beijing, China
- National Clinical Research Center for Mental Disorders (Peking University), NHC Key Laboratory for Mental Health, Beijing, China
| | - Yuhan Xie
- Dementia Care and Research Center, Peking University Institute of Mental Health (Sixth Hospital), Beijing, China
- National Clinical Research Center for Mental Disorders (Peking University), NHC Key Laboratory for Mental Health, Beijing, China
| | - Xiaozhen Lv
- Dementia Care and Research Center, Peking University Institute of Mental Health (Sixth Hospital), Beijing, China
- National Clinical Research Center for Mental Disorders (Peking University), NHC Key Laboratory for Mental Health, Beijing, China
| | - Jing Wang
- Dementia Care and Research Center, Peking University Institute of Mental Health (Sixth Hospital), Beijing, China
- National Clinical Research Center for Mental Disorders (Peking University), NHC Key Laboratory for Mental Health, Beijing, China
| | - Xin Yu
- Dementia Care and Research Center, Peking University Institute of Mental Health (Sixth Hospital), Beijing, China
- National Clinical Research Center for Mental Disorders (Peking University), NHC Key Laboratory for Mental Health, Beijing, China
| | - Huali Wang
- Dementia Care and Research Center, Peking University Institute of Mental Health (Sixth Hospital), Beijing, China
- National Clinical Research Center for Mental Disorders (Peking University), NHC Key Laboratory for Mental Health, Beijing, China
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Parra MA, Granada J, Fernández G. Memory-driven eye movements prospectively predict dementia in people at risk of Alzheimer's disease. ALZHEIMER'S & DEMENTIA (AMSTERDAM, NETHERLANDS) 2022; 14:e12386. [PMID: 36579131 PMCID: PMC9780510 DOI: 10.1002/dad2.12386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 09/29/2022] [Accepted: 10/21/2022] [Indexed: 12/24/2022]
Abstract
Introduction Oculomotor behaviors linked to cognitive performance revealed neurocognitive features of Alzheimer's disease (AD) that can enhance the accuracy of its assessment and diagnosis. Methods A sample of 107 participants (i.e., 65 mild cognitive impairment [MCI] and 42 controls) were recruited and followed up for 40 months. At baseline, they underwent assessment with the ViewMind digital biomarker, which draws cognitive-related patterns of eye movement while people perform the visual short-term memory binding task. Results Baseline data predicted that 36 patients with MCI would progress to the AD clinical syndrome (ADS Progressing). The remaining 29 MCI patients were predicted to remain as MCI or progress to other forms of dementia. After 40 months of follow-up, 94% of ADS Progressing patients had received a diagnosis of dementia, whereas none of the non-ADS Progressing had. Discussion The analysis of eye movement behavior combined with cognitive markers for AD can effectively predict progression to ADS among patients with MCI.
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Affiliation(s)
- Mario A Parra
- School of Psychological Sciences and HealthUniversity of StrathclydeGlasgowUK,ViewMind IncDelawareUSA
| | | | - Gerardo Fernández
- ViewMind IncDelawareUSA,Laboratorio de Desarrollo en Neurociencias Cognitivas, Instituto de Investigaciones en Ingeniería Eléctrica (IIIE) (UNS‐CONICET)Bahía BlancaBuenos AiresArgentina,Axis NeurocienciasBahía BlancaArgentina
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Haberstumpf S, Leinweber J, Lauer M, Polak T, Deckert J, Herrmann MJ. Factors associated with dropout in the longitudinal Vogel study of cognitive decline. Eur J Neurosci 2022; 56:5587-5600. [PMID: 34490950 DOI: 10.1111/ejn.15446] [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: 06/01/2021] [Revised: 08/20/2021] [Accepted: 08/25/2021] [Indexed: 12/14/2022]
Abstract
Dementia, including Alzheimer's disease, is a growing problem worldwide. Prevention or early detection of the disease or a prodromal cognitive decline is necessary. By means of our long-term follow-up 'Vogel study', we aim to predict the pathological cognitive decline of a German cohort (mean age was 73.9 ± 1.55 years at first visit) with three measurement time points within 6 years per participant. Especially in samples of the elderly and subjects with chronic or co-morbid diseases, dropouts are one of the biggest problems of long-term studies. In contrast to the large number of research articles conducted on the course of dementia, little research has been done on the completion of treatment. To ensure unbiased and reliable predictors of cognitive decline from study completers, our objective was to determine predictors of dropout. We conducted multivariate analyses of covariance and multinomial logistic regression analyses to compare and predict the subject's dropout behaviour at the second visit 3 years after baseline (full participation, partial participation and no participation/dropout) with neuropsychiatric, cognitive, blood and lifestyle variables. Lower performance in declarative memory, attention and visual-spatial processing predicted dropout rather than full participation. Lower performance in visual-spatial processing predicted partial participation as opposed to full participation. Furthermore, lower performance in mini-mental status examination predicted whether subjects dropped out or participated partially instead of full participation. Baseline cognitive parameters are associated with dropouts at follow-up with a loss of impaired participants. We expect a bias into a healthier sample over time.
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Affiliation(s)
- Sophia Haberstumpf
- Center for Mental Health, Department of Psychiatry, Psychosomatics and Psychotherapy, University Hospital Würzburg, Würzburg, Germany
| | - Jonas Leinweber
- Department of Psychotherapy, Alexianer Psychiatric Hospital Köln-Porz, Köln, Germany
| | - Martin Lauer
- Center for Mental Health, Department of Psychiatry, Psychosomatics and Psychotherapy, University Hospital Würzburg, Würzburg, Germany
| | - Thomas Polak
- Center for Mental Health, Department of Psychiatry, Psychosomatics and Psychotherapy, University Hospital Würzburg, Würzburg, Germany
| | - Jürgen Deckert
- Center for Mental Health, Department of Psychiatry, Psychosomatics and Psychotherapy, University Hospital Würzburg, Würzburg, Germany
| | - Martin J Herrmann
- Center for Mental Health, Department of Psychiatry, Psychosomatics and Psychotherapy, University Hospital Würzburg, Würzburg, Germany
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9
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Cimminella F, D'Innocenzo G, Sala SD, Iavarone A, Musella C, Coco MI. Preserved Extra-Foveal Processing of Object Semantics in Alzheimer's Disease. J Geriatr Psychiatry Neurol 2022; 35:418-433. [PMID: 34044661 DOI: 10.1177/08919887211016056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Alzheimer's disease (AD) patients underperform on a range of tasks requiring semantic processing, but it is unclear whether this impairment is due to a generalised loss of semantic knowledge or to issues in accessing and selecting such information from memory. The objective of this eye-tracking visual search study was to determine whether semantic expectancy mechanisms known to support object recognition in healthy adults are preserved in AD patients. Furthermore, as AD patients are often reported to be impaired in accessing information in extra-foveal vision, we investigated whether that was also the case in our study. Twenty AD patients and 20 age-matched controls searched for a target object among an array of distractors presented extra-foveally. The distractors were either semantically related or unrelated to the target (e.g., a car in an array with other vehicles or kitchen items). Results showed that semantically related objects were detected with more difficulty than semantically unrelated objects by both groups, but more markedly by the AD group. Participants looked earlier and for longer at the critical objects when these were semantically unrelated to the distractors. Our findings show that AD patients can process the semantics of objects and access it in extra-foveal vision. This suggests that their impairments in semantic processing may reflect difficulties in accessing semantic information rather than a generalised loss of semantic memory.
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Affiliation(s)
- Francesco Cimminella
- Human Cognitive Neuroscience, Psychology, University of Edinburgh, Edinburgh, United Kingdom.,Laboratory of Experimental Psychology, Suor Orsola Benincasa University, Naples, Italy
| | | | - Sergio Della Sala
- Human Cognitive Neuroscience, Psychology, University of Edinburgh, Edinburgh, United Kingdom
| | | | - Caterina Musella
- Associazione Italiana Malattia d'Alzheimer (AIMA sezione Campania), Naples, Italy
| | - Moreno I Coco
- Faculdade de Psicologia, Universidade de Lisboa, Lisbon, Portugal.,School of Psychology, The University of East London, London, United Kingdom
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Abstract
Recently, Alzheimer's Disease International (ADI) stressed that around 75% of people living with dementia globally are still not receiving a diagnosis. In this commentary, I reflect on how efforts towards better cognitive assessments, particularly of memory, can be aligned and harmonized to contribute to such needs. I highlight some barriers that ongoing collaborations and trials are facing and their potential drivers. I suggest some strategies that can help overcome them and in so doing, integrate research agendas. We need to ignite the debate towards strategies that can help level the playfield to tackle Alzheimer's disease with true global solutions.
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Affiliation(s)
- Mario A Parra
- School of Psychological Sciences and Health, University of Strathclyde, Glasgow, Scotland, UK
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11
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Almario G, Piñero DP. Impact of Alzheimer's Disease in Ocular Motility and Visual Perception: A Narrative Review. Semin Ophthalmol 2021; 37:436-446. [PMID: 34779338 DOI: 10.1080/08820538.2021.2002371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
PURPOSE Alzheimer's disease (AD) is a neurodegenerative disease generating a progressive neuronal loss as well as cognitive deficiencies. This disease can be accompanied by ocular manifestations, including alterations in ocular motility and visual perception. The aim of the current review article was to collect all the information about these alterations and to analyze if there is scientific evidence supporting the potential use of these changes as biomarkers of the disease. METHODS A bibliographic search was performed using two different databases, Pubmed and Google Scholar, as well as a search of material in non-peer reviewed journals about Alzheimer's and Neurology. A total of 227 articles were found in the initial search, but only 76 were included considering their relevance according to the purpose of the reviewResults: This narrative review describes the findings obtained in this area to this date, confirming that deficiencies in saccades is the most common condition among AD patients. Furthermore, other visual alterations have also been reported in these patients, including a compromise of visual acuity and contrast sensitivity, fluctuations of colour vision, stereopsis impairment and visual field losses. Likewise, other complex visuo-spatial and visuo-perceptual impairments can be present. More studies are still needed to understand better what type of changes occurs in ocular alignment, binocularity, and fixation pattern in AD patients. CONCLUSIONS AD is associated to visual perception and ocular motility alterations. All the scientific information found in this review should be considered as a guide for designing future studies and to define adequate clinical protocols for the visual evaluation of patients with AD, considering the cognitive limitations that are normally present in this type of patients.
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Affiliation(s)
- Gemma Almario
- Department of Optics, Pharmacology and Anatomy, University of Alicante, Alicante, Spain.,Punto Óptico, Elche, Alicante, Spain
| | - David P Piñero
- Department of Optics, Pharmacology and Anatomy, University of Alicante, Alicante, Spain.,Department of Ophthalmology, Vithas Medimar International Hospital, Alicante, Spain
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12
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Fernández G, Parra MA. Oculomotor Behaviors and Integrative Memory Functions in the Alzheimer's Clinical Syndrome. J Alzheimers Dis 2021; 82:1033-1044. [PMID: 34151787 DOI: 10.3233/jad-201189] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
BACKGROUND Biological information drawn from eye-tracking metrics is providing evidence regarding drivers of cognitive decline in Alzheimer's disease. In particular, pupil size has proved useful to investigate cognitive performance during online activities. OBJECTIVE To investigate the oculomotor correlates of impaired performance of patients with mild Alzheimer's Clinical Syndrome (ACS) on a recently developed memory paradigm, namely the Short-Term Memory Binding Test (STMBT). METHODS We assessed a sample of eighteen healthy controls (HC) and eighteen patients with a diagnosis of mild ACS with the STMBT while we recorded their oculomotor behaviors using pupillometry and eye-tracking. RESULTS As expected, a group (healthy controls versus ACS) by condition (Unbound Colours versus Bound Colours) interaction was found whereby behavioral group differences were paramount in the Bound Colours condition. Healthy controls' pupils dilated significantly more in the Bound Colours than in the Unbound Colours condition, a discrepancy not observed in ACS patients. Furthermore, ROC analysis revealed the abnormal pupil behaviors distinguished ACS patients from healthy controls with values of sensitivity and specify of 100%, thus outperforming both recognition scores and gaze duration. CONCLUSION The biological correlates of Short-Term Memory Binding impairments appear to involve a network much wider than we have thought to date, which expands across cortical and subcortical structures. We discuss these findings focusing on their implications for our understanding of neurocognitive phenotypes in the preclinical stages of Alzheimer's disease and potential development of cognitive biomarkers that can support ongoing initiatives to prevent dementia.
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Affiliation(s)
- Gerardo Fernández
- Chief Scientific Officer, ViewMind Inc., New York, NY, USA.,Axis Neurociencias, Bahía Blanca, Argentina.,Instituto de Investigaciones en Ingeniería Eléctrica (IIIE) (UNS-CONICET), Bahía Blanca, Buenos Aires, Argentina
| | - Mario A Parra
- School of Psychological Sciences and Health, University of Strathclyde, Glasgow, UK
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13
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Pavisic IM, Pertzov Y, Nicholas JM, O'Connor A, Lu K, Yong KXX, Husain M, Fox NC, Crutch SJ. Eye-tracking indices of impaired encoding of visual short-term memory in familial Alzheimer's disease. Sci Rep 2021; 11:8696. [PMID: 33888739 PMCID: PMC8062689 DOI: 10.1038/s41598-021-88001-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Accepted: 04/05/2021] [Indexed: 12/18/2022] Open
Abstract
The basis of visual short-term memory (VSTM) impairments in preclinical Alzheimer's disease (AD) remains unclear. Research suggests that eye movements may serve as indirect surrogates to investigate VSTM. Yet, investigations in preclinical populations are lacking. Fifty-two individuals from a familial Alzheimer's disease (FAD) cohort (9 symptomatic carriers, 17 presymptomatic carriers and 26 controls) completed the "Object-localisation" VSTM task while an eye-tracker recorded eye movements during the stimulus presentation. VSTM function and oculomotor performance were compared between groups and their association during encoding investigated. Compared to controls, symptomatic FAD carriers showed eye movement patterns suggestive of an ineffective encoding and presymptomatic FAD carriers within 6 years of their expected age at symptom onset, were more reliant on the stimuli fixation time to achieve accuracy in the localisation of the target. Consequently, for shorter fixation times on the stimuli, presymptomatic carriers were less accurate at localising the target than controls. By contrast, the only deficits detected on behavioural VSTM function was in symptomatic individuals. Our findings provide novel evidence that encoding processes may be vulnerable and weakened in presymptomatic FAD carriers, most prominently for spatial memory, suggesting a possible explanation for the subtle VSTM impairments observed in the preclinical stages of AD.
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Affiliation(s)
- Ivanna M Pavisic
- Department of Neurodegenerative Diseases, Dementia Research Centre, UCL Queen Square Institute of Neurology, London, WC1N 3BG, UK. .,UK Dementia Research Institute at University College London, London, UK.
| | - Yoni Pertzov
- Department of Psychology, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Jennifer M Nicholas
- Department of Neurodegenerative Diseases, Dementia Research Centre, UCL Queen Square Institute of Neurology, London, WC1N 3BG, UK.,Department of Medial Statistics, London School of Hygiene and Tropical Medicine, London, UK
| | - Antoinette O'Connor
- Department of Neurodegenerative Diseases, Dementia Research Centre, UCL Queen Square Institute of Neurology, London, WC1N 3BG, UK.,UK Dementia Research Institute at University College London, London, UK
| | - Kirsty Lu
- Department of Neurodegenerative Diseases, Dementia Research Centre, UCL Queen Square Institute of Neurology, London, WC1N 3BG, UK
| | - Keir X X Yong
- Department of Neurodegenerative Diseases, Dementia Research Centre, UCL Queen Square Institute of Neurology, London, WC1N 3BG, UK
| | - Masud Husain
- Nuffield Department of Clinical Neuroscience, University of Oxford, Oxford, UK.,Department of Experimental Psychology, University of Oxford, Oxford, UK
| | - Nick C Fox
- Department of Neurodegenerative Diseases, Dementia Research Centre, UCL Queen Square Institute of Neurology, London, WC1N 3BG, UK.,UK Dementia Research Institute at University College London, London, UK
| | - Sebastian J Crutch
- Department of Neurodegenerative Diseases, Dementia Research Centre, UCL Queen Square Institute of Neurology, London, WC1N 3BG, UK.,UK Dementia Research Institute at University College London, London, UK
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14
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Nie J, Qiu Q, Phillips M, Sun L, Yan F, Lin X, Xiao S, Li X. Early Diagnosis of Mild Cognitive Impairment Based on Eye Movement Parameters in an Aging Chinese Population. Front Aging Neurosci 2020; 12:221. [PMID: 32848703 PMCID: PMC7405864 DOI: 10.3389/fnagi.2020.00221] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Accepted: 06/22/2020] [Indexed: 01/04/2023] Open
Abstract
Background: The pathogenesis of dementia often starts several years prior to clinical onset during which the individual is asymptomatic. Existing strategies for the accurate diagnosis of early dementia are limited by high cost and the invasive nature of the procedures. Eye movement parameters associated with cognitive functions may be helpful in the early identification of dementia and in the development and evaluation of preventive and therapeutic strategies. Objective: We aimed to assess differences in eye movement parameters between healthy elderly individuals and patients with mild cognitive impairment (MCI). Furthermore, we examined the correlations between eye movement parameters with cognitive functions and specific hemispheric region and neural structures in individuals with MCI. Method: Eighty individuals with MCI without dementia (based on DSM-IV criteria) identified by community screening and 170 healthy controls were administered Chinese versions of MoCA and NTB, and a long (20 min) or short (5 min) version of a visual paired comparison (VPC) task. Two weeks later, 44 MCI patients and 107 healthy controls completed a retest of the VPC task, 44 MCI patients and 43 healthy controls among them administered a MRI. At the end of 1-year follow-up, a subset of 26 individuals with MCI and 57 healthy controls were administered the long version of VPC task and MoCA test again. Eye movement parameters and the relationship of eye movement parameters with cognitive functions and with changes in neural structures were compared between groups. Results: Patients with MCI were older, had less education, and had lower scores on cognitive tests than healthy controls. After adjustment for age and level of education, patients with MCI had lower novelty preference scores on the VPC than healthy controls. Using the logistic regression model, the amount of time that subjects focused on these novel images could predict MCI patients from normal elderly with an out of sample area under the receiver operator characteristic curve of 0.62. Furthermore, the cognition score of subjects whose novelty preference score was low decreased more remarkably in 1 year. For both the patient and control groups, VPC novelty preference was significantly correlated with verbal fluency and delayed and short-term memory function. Novelty preference score was also significantly correlated with the cortical thickness of several structures in the right hemisphere. Conclusion: Eye movement parameters are stable indicators to distinguish patients with MCI and cognitively normal subjects and are not affected by different testing versions and numbers. Additionally, the patients’ cognitive deficits and eye movement indices were correlated. Future longitudinal studies should further explore the clinical utility of eye movement parameters as early markers of MCI.
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Affiliation(s)
- Jing Nie
- Department of Psychiatry, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Qi Qiu
- Department of Psychiatry, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Michael Phillips
- Department of Psychiatry, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Departments of Psychiatry and Epidemiology, Columbia University, New York, NY, United States
| | - Lin Sun
- Department of Psychiatry, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Feng Yan
- Department of Psychiatry, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiang Lin
- Department of Psychiatry, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Shifu Xiao
- Department of Psychiatry, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xia Li
- Department of Psychiatry, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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15
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Parra MA, Butler S, McGeown WJ, Brown Nicholls LA, Robertson DJ. Globalising strategies to meet global challenges: the case of ageing and dementia. J Glob Health 2019; 9:020310. [PMID: 31777656 PMCID: PMC6858988 DOI: 10.7189/jogh.09.020310] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Affiliation(s)
- Mario A Parra
- School of Psychological Sciences and Health, University of Strathclyde, Glasgow, UK
- Alzheimer’s Scotland Dementia Research Centre, Edinburgh University, UK
- Autonomous University of the Caribbean, Barranquilla, Colombia
| | - Stephen Butler
- School of Psychological Sciences and Health, University of Strathclyde, Glasgow, UK
- Equal contribution, sorted alphabetically by surname
| | - William J. McGeown
- School of Psychological Sciences and Health, University of Strathclyde, Glasgow, UK
- Equal contribution, sorted alphabetically by surname
| | - Louise A Brown Nicholls
- School of Psychological Sciences and Health, University of Strathclyde, Glasgow, UK
- Equal contribution, sorted alphabetically by surname
| | - David J Robertson
- School of Psychological Sciences and Health, University of Strathclyde, Glasgow, UK
- Equal contribution, sorted alphabetically by surname
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16
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Broadhouse KM, Mowszowski L, Duffy S, Leung I, Cross N, Valenzuela MJ, Naismith SL. Memory Performance Correlates of Hippocampal Subfield Volume in Mild Cognitive Impairment Subtype. Front Behav Neurosci 2019; 13:259. [PMID: 31849620 PMCID: PMC6897308 DOI: 10.3389/fnbeh.2019.00259] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Accepted: 11/05/2019] [Indexed: 01/02/2023] Open
Abstract
The increased understanding that neuropathology begins decades before symptom onset, has led to the conceptualization and widespread utilization of Mild Cognitive Impairment (MCI) as an important transitional state between healthy aging and dementia. Further subcategorization to MCI subtype has led to more distinct prognoses and it is widely considered that amnestic and non-amnestic MCI (aMCI, naMCI) likely have distinct pathophysiologies. Yet, accurately classification remains contentious. Here, we differentiate hippocampal subfield volume between subtypes, diagnosed according to stringent clinical consensus criteria, where aMCI is characterized based on deficits in delayed recall (rather than encoding). We then identify memory performance correlates to subfield volume and associations with long-term cognitive performance and outcome. 3D T1-weighted structural MRI was acquired in 142 participants recruited from the Healthy Brain Aging (HBA) Clinic and diagnosed with aMCI (n = 38), naMCI (n = 84) or subjective memory complaints (SMC; n = 20). T1-weighted datasets were processed with the cortical and hippocampal subfield processing streams in FreeSurfer (v6.0). Subfield volumes, and associations with baseline and longitudinal objective memory scores were then examined. Subfield volumes were found to differentiate clinical profiles: subiculum, CA1, CA4 and dentate gyrus volumes were significantly reduced in aMCI compared to both naMCI and SMC. CA1 subfield volume was shown to predict concurrent memory performance in aMCI, while dentate gyrus volume significantly predicted longitudinal verbal learning and memory decline in the entire cohort. Our findings demonstrate that using a more stringent diagnostic approach to characterizing aMCI is well justified, as delayed recall deficits are strongly linked to underlying volumetric subfield reductions in CA1, CA4 and the dentate gyrus, subfields known to be associated with mnemonic processes. Further research is now warranted to replicate these findings in other MCI samples.
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Affiliation(s)
- Kathryn M Broadhouse
- Sunshine Coast Mind and Neuroscience Thompson Institute, University of the Sunshine Coast, Sunshine Coast, QLD, Australia.,Regenerative Neuroscience Group, Brain and Mind Centre, The University of Sydney, Sydney, NSW, Australia
| | - Loren Mowszowski
- Healthy Brain Aging Program, Brain and Mind Centre, The University of Sydney, Sydney, NSW, Australia.,School of Psychology, Faculty of Science, The University of Sydney, Sydney, NSW, Australia
| | - Shantel Duffy
- Healthy Brain Aging Program, Brain and Mind Centre, The University of Sydney, Sydney, NSW, Australia.,Charles Perkins Centre, The University of Sydney, Sydney, NSW, Australia
| | - Isabella Leung
- Regenerative Neuroscience Group, Brain and Mind Centre, The University of Sydney, Sydney, NSW, Australia.,Healthy Brain Aging Program, Brain and Mind Centre, The University of Sydney, Sydney, NSW, Australia
| | - Nathan Cross
- Healthy Brain Aging Program, Brain and Mind Centre, The University of Sydney, Sydney, NSW, Australia
| | - Michael J Valenzuela
- Regenerative Neuroscience Group, Brain and Mind Centre, The University of Sydney, Sydney, NSW, Australia.,Sydney Medical School, The University of Sydney, Sydney, NSW, Australia
| | - Sharon L Naismith
- Healthy Brain Aging Program, Brain and Mind Centre, The University of Sydney, Sydney, NSW, Australia.,School of Psychology, Faculty of Science, The University of Sydney, Sydney, NSW, Australia.,Charles Perkins Centre, The University of Sydney, Sydney, NSW, Australia
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17
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Loughrey DG, Parra MA, Lawlor BA. Visual short-term memory binding deficit with age-related hearing loss in cognitively normal older adults. Sci Rep 2019; 9:12600. [PMID: 31467387 PMCID: PMC6715732 DOI: 10.1038/s41598-019-49023-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Accepted: 08/19/2019] [Indexed: 01/12/2023] Open
Abstract
Age-related hearing loss (ARHL) has been posited as a possible modifiable risk factor for neurocognitive impairment and dementia. Measures sensitive to early neurocognitive changes associated with ARHL would help to elucidate the mechanisms underpinning this relationship. We hypothesized that ARHL might be associated with decline in visual short-term memory binding (VSTMB), a potential biomarker for preclinical dementia due to Alzheimer’s disease (AD). We examined differences in accuracy between older adults with hearing loss and a control group on the VSTMB task from a single feature (shapes) condition to a feature binding (shapes-colors) condition. Hearing loss was associated with a weaker capacity to process bound features which appeared to be accounted for by a weaker sensitivity for change detection (A’). Our findings give insight into the neural mechanisms underpinning neurocognitive decline with ARHL and its temporal sequence.
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Affiliation(s)
- David G Loughrey
- Global Brain Health Institute, Trinity College Dublin, Dublin, Ireland/University of California, San Francisco, USA. .,Trinity College Institute of Neuroscience, Trinity College Dublin, Dublin, Ireland.
| | - Mario A Parra
- School of Psychological Sciences and Health, University of Strathclyde, Glasgow, UK.,Programa de Psicología, Universidad Autónoma del Caribe, Barranquilla, Colombia
| | - Brian A Lawlor
- Global Brain Health Institute, Trinity College Dublin, Dublin, Ireland/University of California, San Francisco, USA.,Trinity College Institute of Neuroscience, Trinity College Dublin, Dublin, Ireland.,School of Medicine, Trinity College Dublin, Dublin, Ireland.,Mercer's Institute for Successful Ageing, St James Hospital, Dublin, Ireland
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18
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Parra MA, Calia C, García AF, Olazarán-Rodríguez J, Hernandez-Tamames JA, Alvarez-Linera J, Della Sala S, Fernandez Guinea S. Refining memory assessment of elderly people with cognitive impairment: Insights from the short-term memory binding test. Arch Gerontol Geriatr 2019; 83:114-120. [DOI: 10.1016/j.archger.2019.03.025] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2018] [Revised: 03/24/2019] [Accepted: 03/26/2019] [Indexed: 12/17/2022]
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19
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Visual short-term memory for coherent motion in video game players: evidence from a memory-masking paradigm. Sci Rep 2019; 9:6027. [PMID: 30988353 PMCID: PMC6465596 DOI: 10.1038/s41598-019-42593-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 03/28/2019] [Indexed: 01/12/2023] Open
Abstract
In this study, we investigated visual short-term memory for coherent motion in action video game players (AVGPs), non-action video game players (NAVGPs), and non-gamers (control group: CONs). Participants performed a visual memory-masking paradigm previously used with macaque monkeys and humans. In particular, we tested whether video game players form a more robust visual short-term memory trace for coherent moving stimuli during the encoding phase, and whether such memory traces are less affected by an intervening masking stimulus presented 0.2 s after the offset of the to-be-remembered sample. The results showed that task performance of all groups was affected by the masking stimulus, but video game players were affected to a lesser extent than controls. Modelling of performance values and reaction times revealed that video game players have a lower guessing rate than CONs, and higher drift rates than CONs, indicative of more efficient perceptual decisions. These results suggest that video game players exhibit a more robust VSTM trace for moving objects and this trace is less prone to external interference.
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