1
|
Mao L, Hong X, Hu M. Identifying neuroimaging biomarkers in major depressive disorder using machine learning algorithms and functional near-infrared spectroscopy (fNIRS) during verbal fluency task. J Affect Disord 2024; 365:9-20. [PMID: 39151759 DOI: 10.1016/j.jad.2024.08.082] [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] [Received: 05/09/2024] [Revised: 08/12/2024] [Accepted: 08/13/2024] [Indexed: 08/19/2024]
Abstract
One of the most prevalent psychiatric disorders is major depressive disorder (MDD), which increases the probability of suicidal ideation or untimely demise. Abnormal frontal hemodynamic changes detected by functional near-infrared spectroscopy (fNIRS) during verbal fluency task (VFT) have the potential to be used as an objective indicator for assessing clinical symptoms. However, comprehensive quantitative and objective assessment instruments for individuals who exhibit symptoms suggestive of depression remain undeveloped. Drawing from a total of 467 samples in a large-scale dataset comprising 289 MDD patients and 178 healthy controls, fNIRS measurements were obtained throughout the VFT. To identify unique MDD biomarkers, this research introduced a data representation approach for extracting spatiotemporal features from fNIRS signals, which were subsequently utilized as potential predictors. Machine learning classifiers (e.g., Gradient Boosted Decision Trees (GBDT) and Multilayer Perceptron) were implemented to assess the ability to predict selected features. The mean and standard deviation of the cross-validation indicated that the GBDT model, when combined with the 180-feature pattern, distinguishes patients with MDD from healthy controls in the most effective manner. The accuracy of correct classification for the test set was 0.829 ± 0.053, with an AUC of 0.895 (95 % CI: 0.864-0.925) and a sensitivity of 0.914 ± 0.051. Channels that made the most important contribution to the identification of MDD were identified using Shapley Additive Explanations method, located in the frontopolar area and the dorsolateral prefrontal cortex, as well as pars triangularis Broca's area. Assessment of abnormal prefrontal activity during the VFT in MDD serves as an objectively measurable biomarker that could be utilized to evaluate cognitive deficits and facilitate early screening for MDD. The model suggested in this research could be applied to large-scale case-control fNIRS datasets to detect unique characteristics of MDD and offer clinicians an objective biomarker-based analytical instrument to assist in the evaluation of suspicious cases.
Collapse
Affiliation(s)
- Lingyun Mao
- Department of Psychology, School of Social and Behavioral Sciences, Nanjing University, Nanjing, China; Department of Psychosomatic Medicine, The First Affiliated Hospital of Nanchang University, Nanchang, China.
| | - Xin Hong
- Department of Psychosomatic Medicine, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Maorong Hu
- Department of Psychosomatic Medicine, The First Affiliated Hospital of Nanchang University, Nanchang, China.
| |
Collapse
|
2
|
Balboa-Bandeira Y, Zubiaurre-Elorza L, García-Guerrero MA, Ibarretxe-Bilbao N, Ojeda N, Peña J. Enhancement of phonemic verbal fluency in multilingual young adults by transcranial random noise stimulation. Neuropsychologia 2024; 198:108882. [PMID: 38599569 DOI: 10.1016/j.neuropsychologia.2024.108882] [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: 07/19/2023] [Revised: 03/25/2024] [Accepted: 04/02/2024] [Indexed: 04/12/2024]
Abstract
Several studies have analyzed the effects of transcranial direct current stimulation on verbal fluency tasks in non-clinical populations. Nevertheless, the reported effects on verbal fluency are inconsistent. In addition, the effect of other techniques such as transcranial random noise stimulation (tRNS) on verbal fluency enhancement has yet to be studied in healthy multilingual populations. This study aims to explore the effects of tRNS on verbal fluency in healthy multilingual individuals. Fifty healthy multilingual (Spanish, English and Basque) adults were randomly assigned to a tRNS or sham group. Electrodes were placed on the left dorsolateral prefrontal cortex and left inferior frontal gyrus. All participants performed phonemic and semantic verbal fluency tasks before, during (online assessment) and immediately after (offline assessment) stimulation in three different languages. The results showed significantly better performance by participants who received tRNS in the phonemic verbal fluency tasks in Spanish (in the online and offline assessment) and English (in the offline assessment). No differences between conditions were found in Basque nor semantic verbal fluency. These findings suggests that tRNS on the left prefrontal cortex could help improve phonemic, yet not semantic, fluency in healthy multilingual adults.
Collapse
Affiliation(s)
| | - Leire Zubiaurre-Elorza
- Department of Psychology, Faculty of Health Sciences, University of Deusto, Bilbao, Spain
| | | | - Naroa Ibarretxe-Bilbao
- Department of Psychology, Faculty of Health Sciences, University of Deusto, Bilbao, Spain
| | - Natalia Ojeda
- Department of Psychology, Faculty of Health Sciences, University of Deusto, Bilbao, Spain
| | - Javier Peña
- Department of Psychology, Faculty of Health Sciences, University of Deusto, Bilbao, Spain.
| |
Collapse
|
3
|
Franzen S, Nuytemans K, Bourdage R, Caramelli P, Ellajosyula R, Finger E, Illán-Gala I, Loi SM, Morhardt D, Pijnenburg Y, Rascovsky K, Williams MM, Yokoyama J, Alladi S, Broce I, Castro-Suarez S, Coleman K, de Souza LC, Dacks PA, de Boer SCM, de Leon J, Dodge S, Grasso S, Gupta V, Gupta V, Ghoshal N, Kamath V, Kumfor F, Matias-Guiu JA, Narme P, Nielsen TR, Okhuevbie D, Piña-Escudero SD, Garcia RR, Scarioni M, Slachevsky A, Suarez-Gonzalez A, Tee BL, Tsoy E, Ulugut H, Babulal GM, Onyike CU. Gaps in clinical research in frontotemporal dementia: A call for diversity and disparities-focused research. Alzheimers Dement 2023; 19:5817-5836. [PMID: 37270665 PMCID: PMC10693651 DOI: 10.1002/alz.13129] [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: 01/12/2023] [Accepted: 02/06/2023] [Indexed: 06/05/2023]
Abstract
Frontotemporal dementia (FTD) is one of the leading causes of dementia before age 65 and often manifests as abnormal behavior (in behavioral variant FTD) or language impairment (in primary progressive aphasia). FTD's exact clinical presentation varies by culture, language, education, social norms, and other socioeconomic factors; current research and clinical practice, however, is mainly based on studies conducted in North America and Western Europe. Changes in diagnostic criteria and procedures as well as new or adapted cognitive tests are likely needed to take into consideration global diversity. This perspective paper by two professional interest areas of the Alzheimer's Association International Society to Advance Alzheimer's Research and Treatment examines how increasing global diversity impacts the clinical presentation, screening, assessment, and diagnosis of FTD and its treatment and care. It subsequently provides recommendations to address immediate needs to advance global FTD research and clinical practice.
Collapse
Affiliation(s)
- Sanne Franzen
- Department of Neurology and Alzheimer Center, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - Karen Nuytemans
- John P. Hussman Institute for Human Genomics and Dr. John T. Macdonald Department of Human Genetics, University of Miami, Miller School of Medicine, Miami, FL
| | - Renelle Bourdage
- Department of Neurology and Alzheimer Center, Erasmus MC University Medical Center, Rotterdam, the Netherlands
- Laboratoire Mémoire Cerveau et Cognition (UR 7536), Institut de Psychologie, Université Paris Cité, Boulogne-Billancourt, France
| | - Paulo Caramelli
- Behavioral and Cognitive Neurology Research Group, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte (MG), Brazil
| | - Ratnavalli Ellajosyula
- Manipal Hospitals, Bangalore and Annasawmy Mudaliar Hospital, Bangalore, India
- Manipal Academy of Higher Education (MAHE), India
| | - Elizabeth Finger
- Parkwood Institute Research, London, Ontario, Canada
- Robarts Research Institute, University of Western Ontario, London, Ontario, Canada
- Department of Clinical Neurological Sciences, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada
| | - Ignacio Illán-Gala
- Sant Pau Memory Unit, Department of Neurology, Hospital de la Santa Creu i Sant Pau, Biomedical Research Institute Sant Pau, Universitat Autònoma de Barcelona, Barcelona, Spain
- Centro de Investigación en Red-Enfermedades Neurodegenerativas (CIBERNED), Barcelona, Spain
| | - Samantha M. Loi
- Neuropsychiatry, Royal Melbourne Hospital, Parkville VIC Australia 3050
- Department of Psychiatry, University of Melbourne, Parkville VIC Australia 3052
| | - Darby Morhardt
- Mesulam Center for Cognitive Neurology and Alzheimer’s Disease and Department of Preventive Medicine, Northwestern University Feinberg School of Medicine
| | - Yolande Pijnenburg
- Alzheimer Center Amsterdam, Neurology, Vrije Universiteit Amsterdam, Amsterdam UMC location VUmc, Amsterdam, The Netherlands
- Amsterdam Neuroscience, Neurodegeneration, Amsterdam, The Netherlands
| | - Katya Rascovsky
- Department of Neurology and Penn Frontotemporal Degeneration Center, University of Pennsylvania Perelman School of Medicine
| | | | - Jennifer Yokoyama
- Memory and Aging Center, Department of Neurology, Weill Institute for Neurosciences, University of California, San Francisco, San Francisco, CA 94158, USA
- Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Suvarna Alladi
- National Institute of Mental Health and Neurosciences, Bangalore, India
| | - Iris Broce
- Department of Neurosciences, UC San Diego
- Department of Neurology, UC San Francisco
| | - Sheila Castro-Suarez
- CBI en Demencias y Enfermedades Desmielinizantes del Sistema Nervioso, Instituto Nacional de Ciencias Neurológicas, Lima, Peru
- Atlantic Senior Fellow for Equity in Brain Health at the University of California San Francisco, San Francisco, CA, 94115, USA
| | | | - Leonardo Cruz de Souza
- Department of Internal Medicine, Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | | | - Sterre C. M. de Boer
- Alzheimer Center Amsterdam, Neurology, Vrije Universiteit Amsterdam, Amsterdam UMC location VUmc, Amsterdam, The Netherlands
- Amsterdam Neuroscience, Neurodegeneration, Amsterdam, The Netherlands
| | - Jessica de Leon
- Department of Neurology, Memory and Aging Center, University of California, San Francisco, CA, USA
| | - Shana Dodge
- The Association for Frontotemporal Degeneration
| | - Stephanie Grasso
- Speech, Language and Hearing Sciences, The University of Texas at Austin
| | - Veer Gupta
- IMPACT—The Institute for Mental and Physical Health and Clinical Translation, School of Medicine, Deakin University, Geelong, VIC 3216, Australia
| | - Vivek Gupta
- Macquarie Medical school, Faculty of Medicine, Health and Human Sciences, Macquarie University, NSW, Australia
| | - Nupur Ghoshal
- Depts. of Neurology and Psychiatry, Knight Alzheimer Disease Research Center, Washington University School of Medicine
| | - Vidyulata Kamath
- Department of Psychiatry and Behavioral Sciences, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Fiona Kumfor
- The University of Sydney, Brain & Mind Centre and the School of Psychology, Sydney, Australia
| | - Jordi A. Matias-Guiu
- Department of Neurology, Hospital Clinico San Carlos, San Carlos Institute for Health Research (IdiSSC), Universidad Complutense, Madrid, Spain
| | - Pauline Narme
- Laboratoire Mémoire Cerveau et Cognition (UR 7536), Institut de Psychologie, Université Paris Cité, Boulogne-Billancourt, France
| | - T. Rune Nielsen
- Danish Dementia Research Center, Department of Neurology, The Neuroscience Center, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - Daniel Okhuevbie
- Department of Cell Biology and Genetics, University of Lagos, Nigeria
- Department of Comparative Biosciences, University of Wisconsin-Madison, USA
| | - Stefanie D. Piña-Escudero
- Global Brain Health Institute at the Memory and Aging Center. University of California, San Francisco, USA
| | - Ramiro Ruiz Garcia
- Instituto Nacional de Neurología y Neurocirurgía Manuel Velasco Suárez, Mexico DF, Mexico
| | - Marta Scarioni
- Alzheimer Center Amsterdam, Neurology, Vrije Universiteit Amsterdam, Amsterdam UMC location VUmc, Amsterdam, The Netherlands
- Department of Neurology, Ghent University Hospital, Ghent, Belgium
| | - Andrea Slachevsky
- Geroscience Center for Brain Health and Metabolism (GERO), Santiago, Chile
- Neuropsychology and Clinical Neuroscience Laboratory (LANNEC), Physiopathology Department - Intitute of Biomedical Sciences (ICBM), Neurocience and East Neuroscience Departments, Faculty of Medicine, University of Chile, Santiago, Chile
- Memory and Neuropsychiatric Center (CMYN), Memory Unit, Neurology Department, Hospital del Salvador and Faculty of Medicine, University of Chile, Santiago, Chile
- Servicio de Neurología, Departamento de Medicina, Clínica Alemana-Universidad del Desarrollo, Santiago, Chile
| | - Aida Suarez-Gonzalez
- Dementia Research Centre, UCL Queen Square Institute of Neurology, University College London, London WC1N 3BG, UK
| | - Boon Lead Tee
- Memory and Aging Center, University of California at San Francisco, San Francisco, CA, United States
- Department of Neurology, Dyslexia Center, University of California, San Francisco, CA, United States
- Global Brain Health Institute, University of California, San Francisco, United States
| | - Elena Tsoy
- Speech, Language and Hearing Sciences, The University of Texas at Austin
- Global Brain Health Institute, University of California San Francisco and Trinity College Dublin
| | - Hülya Ulugut
- Alzheimer Center Amsterdam, Neurology, Vrije Universiteit Amsterdam, Amsterdam UMC location VUmc, Amsterdam, The Netherlands
- Amsterdam Neuroscience, Neurodegeneration, Amsterdam, The Netherlands
- Department of Neurology, Memory and Aging Center, University of California, San Francisco, CA, USA
| | - Ganesh M. Babulal
- Department of Neurology, Washington University in St. Louis, St. Louis, MO, USA
- Institute of Public Health, Washington University in St. Louis, St. Louis, MO, USA
- Department of Psychology, Faculty of Humanities, University of Johannesburg, South Africa
- Department of Clinical Research and Leadership, The George Washington University School of Medicine and Health Sciences, Washington, DC, USA
| | - Chiadi U. Onyike
- Department of Psychiatry and Behavioral Sciences, The Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| |
Collapse
|
4
|
Smit AP, Beran M, Twait EL, Geerlings MI, Vonk JMJ. Bear in mind: the role of personal background in semantic animal fluency - The SMART-MR study. Front Psychol 2023; 14:1227053. [PMID: 37809288 PMCID: PMC10556661 DOI: 10.3389/fpsyg.2023.1227053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 09/06/2023] [Indexed: 10/10/2023] Open
Abstract
Objectives Semantic fluency is a prominent neuropsychological task, typically administered within the category 'animals'. With the increasing development of novel item-level metrics of semantic fluency, a concern around the validity of item-level analyses could be that personal background factors (e.g., hobbies like birdwatching or fishing) may disproportionally influence performance. We analyzed animal fluency performance at the item level and investigated the prevalence of individuals with abundant knowledge in specific classes of animals (e.g., birds, fish, insects) and the relationship of such knowledge with personal background factors and other cognitive tasks (episodic memory and executive functioning). Method Participants included 736 Dutch middle-aged to older adults from the SMART-MR cohort (mean age 58 ± 9.4 years, 18% women). Individuals were asked to name as many animals as possible for 2 min. Number of people with abundant animal class knowledge was calculated for the ability to recall a series of minimum ≥5 and up to ≥15 animals within a specific class with at most one interruption by an animal from another class. Subsequent analyses to investigate relationships of abundant class knowledge with sociodemographic characteristics (t-tests and chi-square tests) and cognitive performance (linear regressions) were performed for a cut-off of ≥10 animals within a specific class (90th percentile), with a sensitivity analysis for ≥7 animals (67th percentile). Results A total of 416 (56.2%) participants recalled a series of ≥5 animals from a specific class, 245 (33.3%) participants recalled ≥7, 78 (10.6%) participants recalled ≥10, and 8 (1.1%) participants recalled ≥15. Those who recalled a series of at least 10 animals within a class were older, more often men, and more often retired than those who did not. Moreover, they had a higher total score on animal fluency, letter fluency (i.e., executive functioning), and episodic memory tasks compared to those who did not. Discussion Our results suggest that the benefit of abundant animal class knowledge gained by personal background does not disproportionally influence animal fluency performance as individuals with such knowledge also performed better on other cognitive tasks unrelated to abundant knowledge of animal classes.
Collapse
Affiliation(s)
- Annelot P Smit
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht and Utrecht University, Utrecht, Netherlands
| | - Magdalena Beran
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht and Utrecht University, Utrecht, Netherlands
| | - Emma L Twait
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht and Utrecht University, Utrecht, Netherlands
- Amsterdam UMC, Department of General Practice, Vrije Universiteit, Amsterdam, Netherlands
- Research Institute Amsterdam Public Health, Research Programme Aging and Later Life, and Research Programme Personalized Medicine, Amsterdam, Netherlands
- Research Institute Amsterdam Neuroscience, Research Programme Neurodegeneration, and Research Programme Mood, Anxiety, Psychosis, Stress, and Sleep, Amsterdam, Netherlands
| | - Mirjam I Geerlings
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht and Utrecht University, Utrecht, Netherlands
- Research Institute Amsterdam Public Health, Research Programme Aging and Later Life, and Research Programme Personalized Medicine, Amsterdam, Netherlands
- Research Institute Amsterdam Neuroscience, Research Programme Neurodegeneration, and Research Programme Mood, Anxiety, Psychosis, Stress, and Sleep, Amsterdam, Netherlands
- Amsterdam UMC, Department of General Practice, University of Amsterdam, Amsterdam, Netherlands
| | - Jet M J Vonk
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht and Utrecht University, Utrecht, Netherlands
- Department of Neurology, Memory and Aging Center, University of California, San Francisco (UCSF), San Francisco, CA, United States
| |
Collapse
|
5
|
Gallée J, Cartwright J, Volkmer A, Whitworth A, Hersh D. "Please Don't Assess Him to Destruction": The R.A.I.S.E. Assessment Framework for Primary Progressive Aphasia. AMERICAN JOURNAL OF SPEECH-LANGUAGE PATHOLOGY 2023; 32:391-410. [PMID: 36763839 DOI: 10.1044/2022_ajslp-22-00122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
PURPOSE Speech-language pathologists (SLPs) assess people with primary progressive aphasia (PPA) through measurements of speech, language, communication, and well-being, with the aims of identifying challenges and strengths, monitoring change, and informing treatment directions and supports. The purpose of this clinical focus article is to highlight the necessity for person-centered assessment specific to PPA and to conceptualize a framework that acknowledges the multifaceted nature of assessment for this population. In this framework, the unique challenges posed by a diagnosis of PPA are addressed with the aim to provide practical guidance for clinicians and to support reflection on current practices. METHOD In clinical and research practice, assessment of people with PPA requires an ever-evolving approach that is centered on the client. In this clinical focus article, a discussion-based consensus process was used to synthesize authentic longitudinal experiences of people with PPA to explore assessment approaches, tools, and philosophies. RESULTS This analysis of person-centered assessment identifies seven essential components of assessment in PPA that set the foundation for the five steps of the R.A.I.S.E. Assessment framework. These components each contribute to a clear definition of assessment that reveals clients' competencies with a strengths-based focus; prioritizes the reciprocity of benefits; promotes dynamic assessment; and recognizes the complexity, evolution of assessment over time, and advocacy. CONCLUSIONS This clinical focus article takes a novel look at assessment in PPA by stepping away from assessment practices that focus on revealing deficits and decline and, instead, provides practical recommendations through the conceptualization of a PPA-specific assessment framework. The R.A.I.S.E. Assessment framework is grounded in principles of uplifting clients through person-centered assessment, keeps pace with best practice in PPA intervention, and contributes to a supportive experience for clients and families in the face of a progressive diagnosis over time.
Collapse
Affiliation(s)
- Jeanne Gallée
- Department of Communication Sciences and Disorders, MGH Institute of Health Professions, Boston, MA
- Evergreen Speech & Hearing Clinic, Redmond, WA
| | - Jade Cartwright
- School of Health Sciences, University of Tasmania, Launceston, Australia
| | - Anna Volkmer
- Division of Psychology and Language Sciences, University College London, United Kingdom
| | - Anne Whitworth
- School of Health Sciences, University of Tasmania, Launceston, Australia
| | - Deborah Hersh
- Speech Pathology, School of Allied Health, Curtin University, Perth, Western Australia, Australia
- Speech Pathology, School of Medical and Health Sciences, Edith Cowan University, Perth, Western Australia, Australia
- School of Allied Health Sciences and Practice, Adelaide University, South Australia, Australia
| |
Collapse
|
6
|
Tran BX, Nguyen TT, Boyer L, Fond G, Auquier P, Nguyen HSA, Tran HTN, Nguyen HM, Choi J, Le HT, Latkin CA, Nathan KI, Husain SF, McIntyre RS, Ho CSH, Zhang MWB, Ho RCM. Differentiating people with schizophrenia from healthy controls in a developing Country: An evaluation of portable functional near infrared spectroscopy (fNIRS) as an adjunct diagnostic tool. Front Psychiatry 2023; 14:1061284. [PMID: 36778640 PMCID: PMC9910791 DOI: 10.3389/fpsyt.2023.1061284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 01/05/2023] [Indexed: 01/27/2023] Open
Abstract
INTRODUCTION This study aimed to evaluate portable functional near-infrared spectroscopy (fNIRS) device as an adjunct diagnostic tool in Vietnam to assess hemodynamics when people with schizophrenia and healthy controls performed cognitive tasks. METHODS One hundred fifty-seven participants were divided into schizophrenia (n = 110) and healthy controls group (n = 47), which were recruited by match of age, and gender. Hemodynamic responses in the frontal cortex were monitored with a 48-channel portable device during the Stroop Color-Word Test (SCWT) and Verbal Fluency Test (VFT). General linear model compared the differences in oxyhemoglobin (HbO2) levels between the two groups. The Receiver Operating Characteristic (ROC) graph was generated for each neuroanatomical area. RESULTS People with schizophrenia did not show significant activation in the frontal lobe during the SCWT and VFT as compared to pre-task. During the VFT, the area under the ROC curve of the bilateral dorsolateral prefrontal cortex, bilateral orbitofrontal cortex, bilateral frontopolar prefrontal cortex, and bilateral ventrolateral prefrontal cortex were greater than 0.7 (p < 0.001). The area under the ROC curve (AUC) for the right orbitofrontal cortex was maximal during the VFT (AUC = 0.802, 95%CI = 0.731-0.872). The Youden's index reached a peak (0.57) at the optimal cut-point value (HbO2 cutoff <0.209 μmol/ml for schizophrenia) in which the sensitivity was 85%; specificity was 72%; positive predictive value (PPV) was 0.88; negative predictive value (NPV) was 0.68 and correct classification rate was 76%. DISCUSSION Assessing hemodynamics during VFT by portable fNIRS offers the potential as an adjunct diagnostic tool for schizophrenia in developing countries.
Collapse
Affiliation(s)
- Bach Xuan Tran
- Institute for Preventive Medicine and Public Health, Hanoi Medical University, Hanoi, Vietnam
| | - Tham Thi Nguyen
- Institute for Preventive Medicine and Public Health, Hanoi Medical University, Hanoi, Vietnam
| | - Laurent Boyer
- EA 3279, CEReSS, Research Centre on Health Services and Quality of Life, Aix Marseille University, Marseille, France
| | - Guillaume Fond
- EA 3279, CEReSS, Research Centre on Health Services and Quality of Life, Aix Marseille University, Marseille, France
| | - Pascal Auquier
- EA 3279, CEReSS, Research Centre on Health Services and Quality of Life, Aix Marseille University, Marseille, France
| | | | | | | | | | - Huong Thi Le
- Institute for Preventive Medicine and Public Health, Hanoi Medical University, Hanoi, Vietnam
| | - Carl A Latkin
- Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, United States
| | - Kalpana Isabel Nathan
- Department of Psychiatry and Behavioral Sciences, Stanford University, Stanford, CA, United States
| | - Syeda F Husain
- Department of Paediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Roger S McIntyre
- Mood Disorder Psychopharmacology Unit, University Health Network, University of Toronto, Toronto, ON, Canada.,Institute of Medical Science, University of Toronto, Toronto, ON, Canada.,Department of Psychiatry, University of Toronto, Toronto, ON, Canada.,Department of Pharmacology, University of Toronto, Toronto, ON, Canada
| | - Cyrus S H Ho
- Department of Psychological Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Melvyn W B Zhang
- Family Medicine and Primary Care, Lee Kong Chian School of Medicine, Nanyang Technological University Singapore, Singapore, Singapore
| | - Roger C M Ho
- Department of Psychological Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,Institute for Health Innovation and Technology, National University of Singapore, Singapore, Singapore
| |
Collapse
|
7
|
The Naming Assessment in Multicultural Europe (NAME): Development and Validation in a Multicultural Memory Clinic. J Int Neuropsychol Soc 2023; 29:92-104. [PMID: 35039100 DOI: 10.1017/s135561772100148x] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
OBJECTIVE Traditional naming tests are unsuitable to assess naming impairment in diverse populations, given the influence of culture, language, and education on naming performance. Our goal was therefore to develop and validate a new test to assess naming impairment in diverse populations: the Naming Assessment in Multicultural Europe (NAME). METHOD We carried out a multistage pilot study. First, we generated a list of 149 potentially suitable items - e.g. from published cross-linguistic word lists and other naming tests - and selected those with a homogeneous age of acquisition and word frequency across languages. We selected three to four colored photographs for each of the 73 remaining items; 194 controls selected the most suitable photographs. Thirteen items were removed after a pilot study in 15 diverse healthy controls. The final 60-item test was validated in 39 controls and 137 diverse memory clinic patients with subjective cognitive impairment, neurological/neurodegenerative disease or psychiatric disorders in the Netherlands and Turkey (mean age: 67, SD: 11). Patients were from 15 different countries; the majority completed primary education or less (53%). RESULTS The NAME showed excellent reliability (Spearman-Brown coefficient: 0.95; Kuder-Richardson coefficient: 0.94) and robust correlations with other language tests (ρ = .35-.73). Patients with AD/mixed dementia obtained lower scores on most (48/60) NAME items, with an area under the curve of 0.88. NAME scores were correlated with age and education, but not with acculturation or sex. CONCLUSIONS The NAME is a promising tool to assess naming impairment in culturally, educationally, and linguistically diverse individuals.
Collapse
|
8
|
Xue H, Deng R, Chen Y, Zheng W. How does bilingual experience influence novel word learning? Evidence from comparing L1-L3 and L2-L3 cognate status. Front Psychol 2022; 13:1003199. [PMID: 36506949 PMCID: PMC9731340 DOI: 10.3389/fpsyg.2022.1003199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 10/11/2022] [Indexed: 11/25/2022] Open
Abstract
Bilingual experience exerts a complex influence on novel word learning, including the direct effects of transferable prior knowledge and learning skill. However, the facilitation and interference mechanism of such influence has largely been tangled by the similarity of the previously learned word knowledge. The present study compared Chinese-English bilinguals' paired-associate learning of nonwords in logographic and alphabetic writing systems. The logographic nonwords resemble the form and meaning of L1 Chinese words in varying degrees, being cognates, false cognates, or non-cognates of Chinese. The alphabetic nonwords resemble the form and meaning of L2 English words, being cognates, false cognates, or non-cognates of English. The learning sequence of logographic and alphabetic words was cross-balanced. The learning results were measured in production and recognition tasks. As for learning the logographic nonwords, both the recognition and production results showed that cognates were learned significantly faster than the non-cognates, and the false cognates were also learned significantly faster than the non-cognates. This suggests stronger facilitation rather than interference from L1 on novel word learning. As for learning the alphabetic nonwords, both the recognition and production results revealed that cognates were learned significantly faster than the non-cognates, but false cognates showed no advantage over the non-cognates. This indicates that interference from L2 is stronger than that from L1. Taken together, the results provide new evidence for the dissociable facilitation and interference effects of bilingual experience. These results carry potential educational implications in that learning novel words depends on substantial bilingual experience.
Collapse
Affiliation(s)
- Heng Xue
- College of Education, Hebei Normal University, Shijiazhuang, China
| | - Renhua Deng
- School of Foreign Languages, South China University of Technology, Guangzhou, China
| | - Yanyan Chen
- School of Foreign Languages, South China University of Technology, Guangzhou, China,*Correspondence: Yanyan Chen,
| | - Wenxin Zheng
- Sino-Danish College, University of Chinese Academy of Sciences, Beijing, China
| |
Collapse
|
9
|
Garcia DL, Gollan TH. The MINT Sprint: Exploring a Fast Administration Procedure with an Expanded Multilingual Naming Test. J Int Neuropsychol Soc 2022; 28:845-861. [PMID: 34463235 PMCID: PMC8882711 DOI: 10.1017/s1355617721001004] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
OBJECTIVES The present study examined if time-pressured administration of an expanded Multilingual Naming Test (MINT) would improve or compromise assessment of bilingual language proficiency and language dominance. METHODS Eighty Spanish-English bilinguals viewed a grid with 80 MINT-Sprint pictures and were asked to name as many pictures as possible in 3 min in each language in counterbalanced order. An Oral Proficiency Interview rated by four native Spanish-English bilinguals provided independent assessment of proficiency level. Bilinguals also self-rated their proficiency, completed two subtests of the Woodcock-Muñoz, and a speeded translation recognition test. We compared scores after 2 min, a first-pass through all the pictures, and a second-pass in which bilinguals were prompted to try to name skipped items. RESULTS The MINT Sprint and a subset score including original MINT items were highly correlated with Oral Proficiency Interview scores for predicting the degree of language dominance - matching or outperforming all other measures. Self-ratings provided weaker measures (especially of degree of balance - i.e., bilingual index scores) and did not explain any unique variance in measuring the degree of language dominance when considered together with second-pass naming scores. The 2-min scoring procedure did not improve and appeared not to hamper assessment of absolute proficiency level but prompting to try to name skipped items improved assessment of language dominance and naming scores, especially in the nondominant language. CONCLUSIONS Time-pressured rapid naming saves time without significantly compromising assessment of proficiency level. However, breadth of vocabulary knowledge may be as important as retrieval speed for maximizing the accuracy in proficiency assessment.
Collapse
Affiliation(s)
- Dalia L. Garcia
- Joint Doctoral Program in Language and Communicative Disorders, San Diego State University/University of California, San Diego, CA, USA
| | - Tamar H. Gollan
- Department of Psychiatry, University of California, San Diego, CA, USA
| |
Collapse
|
10
|
Medimorec S, Milin P, Divjak D. Frogs, apples, and sand: Effects of cognitive and demographic factors on letter fluency performance. CURRENT PSYCHOLOGY 2022. [DOI: 10.1007/s12144-020-00713-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
11
|
Husain SF, McIntyre RS, Tang TB, Abd Latif MH, Tran BX, Linh VG, Thao TPN, Ho CS, Ho RC. Functional near-infrared spectroscopy during the verbal fluency task of English-Speaking adults with mood disorders: A preliminary study. J Clin Neurosci 2021; 94:94-101. [PMID: 34863469 DOI: 10.1016/j.jocn.2021.10.009] [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] [Received: 04/22/2021] [Revised: 08/10/2021] [Accepted: 10/05/2021] [Indexed: 02/07/2023]
Abstract
Functional near-infrared spectroscopy (fNIRS) provides a direct and objective assessment of cerebral cortex function. It may be used to determine neurophysiological differences between psychiatric disorders with overlapping symptoms, such as major depressive disorder (MDD) and bipolar disorder (BD). Therefore, this preliminary study aimed to compare fNIRS signals during the verbal fluency task (VFT) of English-speaking healthy controls (HC), patients with MDD and patients with BD. Fifteen HCs, 15 patients with MDD and 15 patients with BD were recruited. Groups were matched for age, gender, ethnicity and education. Relative oxy-haemoglobin and deoxy-haemoglobin changes in the frontotemporal cortex was monitored with a 52-channel fNIRS system. Integral values of the frontal and temporal regions were derived as a measure cortical haemodynamic response magnitude. Both patient groups had lower frontal and temporal region integral values than HCs, and patients with MDD had lower frontal region integral value than patients with BD. Moreover, patients could be differentiated from HCs using the frontal and temporal integral values, and patient groups could be differentiated using the frontal region integral values. VFT performance, clinical history and symptom severity were not associated with integral values. These results suggest that prefrontal cortex haemodynamic dysfunction occurs in mood disorders, and it is more extensive in MDD than BD. The fNIRS-VFT paradigm may be a potential tool for differentiating MDD from BD in clinical settings, and these findings need to be verified in a larger sample of English-speaking patients with mood disorders.
Collapse
Affiliation(s)
- Syeda Fabeha Husain
- Institute of Health Innovation and Technology (iHealthtech), National University of Singapore, Singapore; Department of Psychological Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.
| | - Roger S McIntyre
- Mood Disorders Psychopharmacology Unit, University Health Network, Toronto, ON, Canada; Department of Psychiatry, University of Toronto, Toronto, ON, Canada; Department of Pharmacology, University of Toronto, Toronto, ON, Canada; Brain and Cognition Discovery Foundation, Toronto, ON, Canada
| | - Tong-Boon Tang
- Centre for Intelligent Signal and Imaging Research (CISIR), University Teknologi PETRONAS, 32610 Seri Iskandar, Perak Darul Ridzuan, Malaysia
| | - Muhamad Hafiz Abd Latif
- Centre for Intelligent Signal and Imaging Research (CISIR), University Teknologi PETRONAS, 32610 Seri Iskandar, Perak Darul Ridzuan, Malaysia
| | - Bach X Tran
- Institute for Preventive Medicine and Public Health, Hanoi Medical University, Hanoi, Viet Nam; Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
| | - Vu Gia Linh
- Institute for Global Health Innovations, Duy Tan University, Da Nang 550000, Viet Nam; Faculty of Medicine, Duy Tan University, Da Nang 550000, Viet Nam
| | - Thi Phuong Nguyen Thao
- Institute for Global Health Innovations, Duy Tan University, Da Nang 550000, Viet Nam; Faculty of Medicine, Duy Tan University, Da Nang 550000, Viet Nam
| | - Cyrus S Ho
- Department of Psychological Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.
| | - Roger C Ho
- Institute of Health Innovation and Technology (iHealthtech), National University of Singapore, Singapore; Department of Psychological Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| |
Collapse
|
12
|
Instruction in second language enhances linguistic and cognitive abilities in first language as well: evidence from public school education in Nepal. JOURNAL OF CULTURAL COGNITIVE SCIENCE 2021. [DOI: 10.1007/s41809-021-00084-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
13
|
Celik S, Kokje E, Meyer P, Frölich L, Teichmann B. Does bilingualism influence neuropsychological test performance in older adults? A systematic review. APPLIED NEUROPSYCHOLOGY-ADULT 2020; 29:855-873. [PMID: 32677470 DOI: 10.1080/23279095.2020.1788032] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
OBJECTIVE Using standardized tests which have been normed on monolinguals for the assessment of bilinguals presents challenges to the accurate characterization of cognitive profile as the literature provides compelling evidence for the influence of bilingualism on cognitive abilities. However, little is known about the generalizability of these findings to clinical neuropsychology. The aim of this review was to address this gap by summarizing current evidence on the performance of bilingual older adults on standardized tests routinely used in clinical practice. METHOD A systematic search of Web of Science, PsycINFO and PubMed was conducted. 27 cross-sectional and longitudinal studies which use at least one standardized neuropsychological test for cognitive impairment were included in the review. Potential demographic (cultural/linguistic background of the participants, immigrant status), clinical (diagnostic status), and methodological confounders (language of test administration, components of bilingualism) were also examined. The review protocol was registered at the PROSPERO International Prospective Register of Systematic Review with registration number CRD42018114658. RESULTS The results of this review revealed some bilingual advantage on measures of inhibitory control and bilingual disadvantage on measures of verbal fluency in cross-sectional studies. Bilingualism status was not associated with test performance in longitudinal studies. However, findings lack consistency due to demographic variables and methodological differences across studies. CONCLUSION Neuropsychological tests assessing language domains and, to some extent executive function act as clinically relevant features of bilingualism for neuropsychological evaluation. However, immigration status, acculturation level and language of test administration needs to be taken into account when assessing bilingual older adults.
Collapse
Affiliation(s)
- Simge Celik
- Network Aging Research, Heidelberg University, Heidelberg, Germany
| | - Eesha Kokje
- Network Aging Research, Heidelberg University, Heidelberg, Germany
| | - Patric Meyer
- Network Aging Research, Heidelberg University, Heidelberg, Germany.,Faculty of Applied Psychology, SRH University Heidelberg, Heidelberg, Germany
| | - Lutz Frölich
- Network Aging Research, Heidelberg University, Heidelberg, Germany.,Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Heidelberg, Germany
| | - Birgit Teichmann
- Network Aging Research, Heidelberg University, Heidelberg, Germany
| |
Collapse
|
14
|
Validating a functional near-infrared spectroscopy diagnostic paradigm for Major Depressive Disorder. Sci Rep 2020; 10:9740. [PMID: 32546704 PMCID: PMC7298029 DOI: 10.1038/s41598-020-66784-2] [Citation(s) in RCA: 143] [Impact Index Per Article: 35.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Accepted: 05/21/2020] [Indexed: 12/18/2022] Open
Abstract
Reduced haemodynamic response in the frontotemporal cortices of patients with major depressive disorder (MDD) has been demonstrated using functional near-infrared spectroscopy (fNIRS). Most notably, changes in cortical oxy-haemoglobin during a Japanese phonetic fluency task can differentiate psychiatric patients from healthy controls (HC). However, this paradigm has not been validated in the English language. Therefore, the present work aimed to distinguish patients with MDD from HCs, using haemodynamic response measured during an English letter fluency task. One hundred and five HCs and 105 patients with MDD took part in this study. NIRS signals during the verbal fluency task (VFT) was acquired using a 52-channel system, and changes in oxy-haemoglobin in the frontal and temporal regions were quantified. Depression severity, psychosocial functioning, pharmacotherapy and psychiatric history were noted. Patients with MDD had smaller changes in oxy-haemoglobin in the frontal and temporal cortices than HCs. In both regions of interest, oxy-haemoglobin was not associated with any of the clinical variables studied. 75.2% and 76.5% of patients with MDD were correctly classified using frontal and temporal region oxy-haemoglobin, respectively. Haemodynamic response measured by fNIRS during an English letter fluency task is a promising biomarker for MDD.
Collapse
|
15
|
Vonk JMJ, Rizvi B, Lao PJ, Budge M, Manly JJ, Mayeux R, Brickman AM. Letter and Category Fluency Performance Correlates with Distinct Patterns of Cortical Thickness in Older Adults. Cereb Cortex 2019; 29:2694-2700. [PMID: 29893804 PMCID: PMC6519688 DOI: 10.1093/cercor/bhy138] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 04/09/2018] [Accepted: 05/17/2018] [Indexed: 12/12/2022] Open
Abstract
Verbal fluency tasks are generally thought to be mediated by frontal brain regions for letter fluency and temporal regions for category fluency. This idea, however, is primarily based on lesion studies and adapted versions of the fluency tasks in functional neuroimaging, without fundamental evidence from structural neuroimaging in healthy individuals. We investigated the cortical structural correlates of letter and category fluency, including overlapping and different regions, in 505 individuals who participated in a community-based study of healthy aging. The correlation between cortical thickness and verbal fluency in whole-brain analyses revealed distinct cortical signatures for letter fluency, primarily in frontal regions, and category fluency, in frontal and temporal-parietal regions. There was a dissociation in the left inferior frontal gyrus between letter and category fluency, with increased thickness in the posterior-dorsal versus anterior-ventral parts, respectively. These results distinguish the detailed anatomical correlates for verbal fluency within the coarse frontal-temporal distinction inferred from lesion studies and among the mixture of regions identified in functional neuroimaging. The evidence for the anatomical substrates of letter and category fluency, each recruiting slightly different language and cognitive processes, can serve both clinical applications as well as a deeper theoretical understanding of the organization of the cerebral cortex.
Collapse
Affiliation(s)
- Jet M J Vonk
- Department of Neurology, Taub Institute for Research on Alzheimer’s Disease and the Aging Brain, College of Physicians and Surgeons, Columbia University, New York, NY, USA
- Department of Neurology, Gertrude H. Sergievsky Center, College of Physicians and Surgeons, Columbia University, New York, NY, USA
- Department of Neurology, College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Batool Rizvi
- Department of Neurology, Taub Institute for Research on Alzheimer’s Disease and the Aging Brain, College of Physicians and Surgeons, Columbia University, New York, NY, USA
- Department of Neurology, Gertrude H. Sergievsky Center, College of Physicians and Surgeons, Columbia University, New York, NY, USA
- Department of Neurology, College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Patrick J Lao
- Department of Neurology, Taub Institute for Research on Alzheimer’s Disease and the Aging Brain, College of Physicians and Surgeons, Columbia University, New York, NY, USA
- Department of Neurology, Gertrude H. Sergievsky Center, College of Physicians and Surgeons, Columbia University, New York, NY, USA
- Department of Neurology, College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Mariana Budge
- Department of Neurology, Taub Institute for Research on Alzheimer’s Disease and the Aging Brain, College of Physicians and Surgeons, Columbia University, New York, NY, USA
- Department of Neurology, Gertrude H. Sergievsky Center, College of Physicians and Surgeons, Columbia University, New York, NY, USA
- Department of Neurology, College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Jennifer J Manly
- Department of Neurology, Taub Institute for Research on Alzheimer’s Disease and the Aging Brain, College of Physicians and Surgeons, Columbia University, New York, NY, USA
- Department of Neurology, Gertrude H. Sergievsky Center, College of Physicians and Surgeons, Columbia University, New York, NY, USA
- Department of Neurology, College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - Richard Mayeux
- Department of Neurology, Taub Institute for Research on Alzheimer’s Disease and the Aging Brain, College of Physicians and Surgeons, Columbia University, New York, NY, USA
- Department of Neurology, Gertrude H. Sergievsky Center, College of Physicians and Surgeons, Columbia University, New York, NY, USA
- Department of Neurology, College of Physicians and Surgeons, Columbia University, New York, NY, USA
- Department of Psychiatry, College of Physicians and Surgeons, Columbia University, New York, NY, USA
- Department of Epidemiology, Joseph P. Mailman School of Public Health, Columbia University, New York, NY, USA
| | - Adam M Brickman
- Department of Neurology, Taub Institute for Research on Alzheimer’s Disease and the Aging Brain, College of Physicians and Surgeons, Columbia University, New York, NY, USA
- Department of Neurology, Gertrude H. Sergievsky Center, College of Physicians and Surgeons, Columbia University, New York, NY, USA
- Department of Neurology, College of Physicians and Surgeons, Columbia University, New York, NY, USA
| |
Collapse
|
16
|
Vonk JMJ, Flores RJ, Rosado D, Qian C, Cabo R, Habegger J, Louie K, Allocco E, Brickman AM, Manly JJ. Semantic network function captured by word frequency in nondemented APOE ε4 carriers. Neuropsychology 2018; 33:256-262. [PMID: 30489116 DOI: 10.1037/neu0000508] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
OBJECTIVE Accurate identification of the earliest cognitive changes associated with Alzheimer's disease (AD) is critically needed. Item-level information within tests of category fluency, such as lexical frequency, harbors valuable information about the integrity of semantic networks affected early in AD. To determine the potential of lexical frequency as a cognitive marker of AD risk, we investigated whether lexical frequency of animal fluency output differentiated APOE ε4 carriers from noncarriers in a cross-sectional design among older African-American adults without dementia. METHOD We analyzed animal fluency performance using mean number of items and mean lexical frequency among 230 cognitively normal African Americans with and without the APOE ε4 allele. RESULTS Lexical frequency was higher in APOE ε4 carriers than noncarriers when analyzed as a mean score and within time bins. In contrast, we found no group difference in the number of items produced. Lexical frequency was particularly sensitive to ε4 status after the first 10 s of the 60-s animal fluency task. CONCLUSION Our results suggest that psycholinguistic features may hold value as a cognitive biomarker for identifying people at high risk of AD. (PsycINFO Database Record (c) 2019 APA, all rights reserved).
Collapse
Affiliation(s)
- Jet M J Vonk
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain
| | - Roxanna J Flores
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain
| | - Dayanara Rosado
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain
| | - Carolyn Qian
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain
| | - Raquel Cabo
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain
| | - Josina Habegger
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain
| | - Karmen Louie
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain
| | - Elizabeth Allocco
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain
| | - Adam M Brickman
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain
| | - Jennifer J Manly
- Taub Institute for Research on Alzheimer's Disease and the Aging Brain
| |
Collapse
|