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1.
Alzheimers Dement (Amst) ; 16(1): e12547, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38318469

RESUMEN

Preliminary validity of a computer-based test of everyday function (Virtual Kitchen Challenge [VKC]) was examined against brain-imaging markers of cerebrovascular disease and in contrast to conventional neuropsychological and self-report measures. Twenty community-dwelling older adults (n = 6 mild cognitive impairment) performed simulated breakfast and lunch tasks using a computer touchscreen (VKC). Automated measures (completion time, proportion time off screen, etc.) were computed during training and test conditions. White matter hyperintensity (WMH) volumes from brain magnetic resonance imaging and conventional measures of cognition and function also were obtained. VKC completion time and proportion time off screen improved significantly from training to test and were significantly associated with WMH volume (r > 0.573). VKC measures and WMH were not significantly correlated with conventional cognitive or self-report measures. The VKC holds promise as a valid measure of subtle functional difficulties in older adults that is sensitive to change and cerebrovascular pathology, highlighting its potential for clinical trials. Highlights: Virtual Kitchen Challenge (VKC) scores showed significant improvement from training to test conditions.VKC scores (completion time and proportion of time off screen) were associated with a neuroimaging biomarker of brain health (white matter hyperintensities).

2.
Artículo en Inglés | MEDLINE | ID: mdl-37297573

RESUMEN

Loneliness has been linked to morbidity and mortality across the lifespan. Social media could reduce loneliness, though research on the relation between social media and loneliness has been inconclusive. This study used person-centered analyses to elucidate the inconsistencies in the literature and examine the possible role technology barriers played in the relation between social media use and loneliness during the COVID-19 pandemic. Participants (n = 929; M age = 57.58 ± 17.33) responded to a series of online questions covering demographics, loneliness, technology barriers, and social media use (e.g., Facebook, Twitter, etc.) across a range of devices (e.g., computer, smartphone, etc.). A latent profile analysis was conducted to identify distinct profiles of social media use, loneliness patterns, and age. Results yielded five distinct profiles characterized that showed no systematic associations among age, social media use, and loneliness. Demographic characteristics and technology barriers also differed between profiles and were associated with loneliness. In conclusion, person-centered analyses demonstrated distinct groups of older and younger adults that differed on social media use and loneliness and may offer more fruitful insights over variable-centered approaches (e.g., regression/correlation). Technology barriers may be a viable target for reducing loneliness in adults.


Asunto(s)
COVID-19 , Medios de Comunicación Sociales , Humanos , Adulto , Persona de Mediana Edad , Anciano , COVID-19/epidemiología , Soledad , Pandemias , Frutas , Aislamiento Social
3.
Front Hum Neurosci ; 17: 1113971, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-36936617

RESUMEN

Introduction: The media's recent focus on possible negative health outcomes following sports- related concussion has increased awareness as well as anxiety among parents and athletes. However, the literature on concussion outcomes is equivocal and limited by a variety of diagnostic approaches. Methods: The current study used a rigorous, open- access concussion identification method-the Ohio State University Traumatic Brain Injury Identification method (OSU TBI-ID) to identify concussion and periods of repeated, subclinical head trauma in 108 young adult athletes who also underwent a comprehensive protocol of cognitive tests, mood/anxiety questionnaires, and high-angular-resolution diffusion-weighted brain imaging to evaluate potential changes in white matter microstructure. Results: Analyses showed that athletes with a history of repetitive, subclinical impacts to the head performed slightly worse on a measure of inhibitory impulse control and had more anxiety symptoms compared to those who never sustained any type of head injury but were otherwise the same as athletes with no history of concussion. Importantly, there were no group differences in cerebral white matter as measured by tract- based spatial statistics (TBSS), nor were there any associations between OSU TBI-ID measures and whole-brain principal scalars and free-water corrected scalars. Discussion: Our results provide support for the hypothesis that it is not concussion per se, but repetitive head impacts that beget worse outcomes.

4.
Clin Neuropsychol ; 37(6): 1115-1135, 2023 08.
Artículo en Inglés | MEDLINE | ID: mdl-36000515

RESUMEN

OBJECTIVE: To investigate the influence of contextual factors on self-reports of cognitive abilities, this study investigated whether the frequency of self-reported memory failures was affected by level of daily busyness (Busyness) and daily routines (Routine) and whether age moderated these relations. The influence of the COVID-19 pandemic on self-reported memory failures also was explored. Method: 902 community-dwelling participants (mean age= 56.98 years; sd= 18.96; range: 22-97 years) completed self-report questionnaires. Multiple linear regressions examined predictors of the frequency of retrospective (RM) and prospective memory (PM) failures and interactions with age. A pilot measure of the Influence of the Pandemic was added in secondary analyses. Results: Frequency of PM failures was significantly predicted by Age, Busyness, and Routine, such that people who were younger and those with busier and less routine activities reported more frequent PM failures. Frequency of RM failures was significantly predicted by Busyness, and the Age × Busyness and Age × Routine interactions. Busyness was associated with more frequent RM failures for people of all ages, but the effect was stronger for younger people. By contrast, more routine daily schedules were associated with fewer RM failures only for older people. PM/RM failures were predicted by the Influence of the Pandemic in exploratory analyses. Conclusions: Self-reports of cognitive abilities are influenced by contextual factors in adults of all ages. Contextual factors, including everyday task demands, daily routines, and acute stressors that disrupt daily activities, should be considered when interpreting self-reports of cognitive abilities in research and clinical practice settings.


Asunto(s)
COVID-19 , Memoria Episódica , Adulto , Humanos , Anciano , Persona de Mediana Edad , Longevidad , Autoinforme , Estudios Retrospectivos , Neuropsicología , Pandemias , Pruebas Neuropsicológicas , COVID-19/epidemiología
5.
J Clin Exp Neuropsychol ; 44(8): 550-561, 2022 10.
Artículo en Inglés | MEDLINE | ID: mdl-36371699

RESUMEN

Stroke and death remain risks of surgical aortic valve replacement (SAVR). Preoperative cognitive screeners repeatedly show that reduced scores predict postoperative outcome, but less is known about comprehensive neuropsychological measures predicting risk. This study had two aims: 1) investigate whether preoperative cognitive measures predicted postoperative clinical stroke/transient ischemic attack (TIA) and mortality in older adults undergoing SAVR, and 2) identify the best predictors within a comprehensive cognitive protocol. A total of 165 participants aged 65 + with moderate-to-severe aortic stenosis completed a comprehensive cognitive test battery preoperatively. Postoperative stroke evaluations were conducted by trained stroke neurologists preoperatively and postoperatively, and mortality outcomes were obtained by report and records. Logistic regressions were conducted to evaluate preoperative cognitive predictors of clinical stroke/TIA within 1 week of surgery and mortality within 1 year of surgery. Multivariate models showed measures of delayed verbal memory recall (OR = 0.86; 95% CI 0.74-0.99) and visuospatial skills (OR = 0.95; 95% CI 0.90-1.01) predicted clinical stroke/TIA within 1 week of surgery, R2 = .41, p < .001, ƒ2 = .69. Measures of naming ability (OR = 0.88; 95% CI 0.80-0.96), verbal memory recall (OR = 1.23; 95% CI 0.99-1.51), visual memory recall (OR = 0.90; 95% CI 0.80-1.00), medical comorbidities (OR = 1.71; 95% CI 1.22-2.65), and sex (OR = 2.39; 95% CI 0.90-7.04) were significant predictors of death within 1 year of surgery, R2 = .68, p < .001, ƒ2 = 2.12. Preoperative cognitive measures reflecting temporal and parietal lobe functions predicted postoperative clinical stroke/TIA within 1 week of SAVR and mortality within 1 year of SAVR. As such, cognitive measures may offer objective and timely indicators of preoperative health, specifically vulnerabilities in cerebral hypoperfusion, which may inform intervention and/or intensive postoperative monitoring and follow-up after SAVR.


Asunto(s)
Ataque Isquémico Transitorio , Accidente Cerebrovascular , Humanos , Anciano , Válvula Aórtica/cirugía , Resultado del Tratamiento , Accidente Cerebrovascular/complicaciones , Accidente Cerebrovascular/diagnóstico , Cognición , Factores de Riesgo
6.
JMIR Aging ; 5(3): e38130, 2022 Sep 07.
Artículo en Inglés | MEDLINE | ID: mdl-36069747

RESUMEN

As the global burden of dementia continues to plague our healthcare systems, efficient, objective, and sensitive tools to detect neurodegenerative disease and capture meaningful changes in everyday cognition are increasingly needed. Emerging digital tools present a promising option to address many drawbacks of current approaches, with contexts of use that include early detection, risk stratification, prognosis, and outcome measurement. However, conceptual models to guide hypotheses and interpretation of results from digital tools are lacking and are needed to sort and organize the large amount of continuous data from a variety of sensors. In this viewpoint, we propose a neuropsychological framework for use alongside a key emerging approach-digital phenotyping. The Variability in Everyday Behavior (VIBE) model is rooted in established trends from the neuropsychology, neurology, rehabilitation psychology, cognitive neuroscience, and computer science literature and links patterns of intraindividual variability, cognitive abilities, and everyday functioning across clinical stages from healthy to dementia. Based on the VIBE model, we present testable hypotheses to guide the design and interpretation of digital phenotyping studies that capture everyday cognition in vivo. We conclude with methodological considerations and future directions regarding the application of the digital phenotyping approach to improve the efficiency, accessibility, accuracy, and ecological validity of cognitive assessment in older adults.

7.
Neuroimage ; 256: 119267, 2022 08 01.
Artículo en Inglés | MEDLINE | ID: mdl-35504565

RESUMEN

Social relationships change across the lifespan as social networks narrow and motivational priorities shift to the present. Interestingly, aging is also associated with changes in executive function, including decision-making abilities, but it remains unclear how age-related changes in both domains interact to impact financial decisions involving other people. To study this problem, we recruited 50 human participants (Nyounger = 26, ages 18-34; Nolder = 24, ages 63-80) to play an economic trust game as the investor with three partners (friend, stranger, and computer) who played the role of investee. Investors underwent functional magnetic resonance imaging (fMRI) during the trust game while investees were seated outside of the scanner. Building on our previous work with younger adults showing both enhanced striatal responses and altered default-mode network (DMN) connectivity as a function of social closeness during reciprocated trust, we predicted that these relations would exhibit age-related differences. We found that striatal responses to reciprocated trust from friends relative to strangers and computers were blunted in older adults relative to younger adults, thus supporting our primary pre-registered hypothesis regarding social closeness. We also found that older adults exhibited enhanced DMN connectivity with the temporoparietal junction (TPJ) during reciprocated trust from friends compared to computers while younger adults exhibited the opposite pattern. Taken together, these results advance our understanding of age-related differences in sensitivity to social closeness in the context of trusting others.


Asunto(s)
Red en Modo Predeterminado , Estriado Ventral , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Mapeo Encefálico , Red en Modo Predeterminado/diagnóstico por imagen , Función Ejecutiva , Humanos , Imagen por Resonancia Magnética , Persona de Mediana Edad , Confianza , Estriado Ventral/diagnóstico por imagen , Adulto Joven
8.
Neuropsychol Rehabil ; 32(1): 22-50, 2022 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-32684106

RESUMEN

The SmartPrompt is a smartphone-based reminder application informed by a neuropsychological model of functional disability. This laboratory-based pilot study examined the SmartPrompt feasibility, efficacy, and subjective usability using a within-participant, counterbalanced, cross-over design. Ten participants (M age = 80.3 + 8.2; M education = 15.7 + 2.5; 60% female) with mild cognitive impairment or mild dementia completed the Remember to Drink Test, which required preparing a glass of water at four predetermined times, in a SmartPrompt (SP) and Unprompted condition (UP). Written cues and a clock were available in both conditions; however, in the SP, the smartphone presented auditory alarms and visual reminders to obtain the water at specified times and required photo logging. In a separate session, caregivers were trained and tested on configuring the SmartPrompt. Overall, caregivers and participants learned to effectively use the SmartPrompt. Caregivers achieved near-perfect scores on the configuration quiz and responded well to training. Participants completed significantly more Remember to Drink tasks in the SP (93%) than UP (56%); checking the cues/clock decreased by 87% in the SP. Usability ratings were excellent among caregivers and fair among participants. Results indicate that the SmartPrompt holds promise for reducing functional disability in older adults with cognitive difficulties in at-home contexts.


Asunto(s)
Disfunción Cognitiva , Demencia , Aplicaciones Móviles , Anciano , Anciano de 80 o más Años , Femenino , Humanos , Masculino , Proyectos Piloto , Teléfono Inteligente
9.
Aging Ment Health ; 26(6): 1253-1260, 2022 06.
Artículo en Inglés | MEDLINE | ID: mdl-33970703

RESUMEN

OBJECTIVES: Grit is a noncognitive trait that has been shown to increase monotonically throughout adulthood and predict late-life cognitive performance. Less is known about the relation between grit and successful aging in older adults. METHOD: Participants over 55-years-old (N = 185) completed a series of self-report surveys assessing demographics, grit (Short Grit Scale; Grit-S), physical and emotional functioning (Medical Outcomes Study Short Form Health Survey; SF-36), and changes in cognitive functioning (Everyday Cognition; ECog). Principal component analysis of the Grit-S was conducted, and then Pearson product moment correlations and multiple linear regressions were used to assess the relations between grit, age, and measures of successful aging. RESULTS: Grit showed no association with age, even after controlling for education. Grit total score was positively associated with a variety of successful aging variables (SF-36; physical, emotional, and social functioning, energy, general health; all p's <.001). Component analysis of the Grit-S showed a two-component solution representing Consistency and Perseverance. Both components predicted SF-36 measures of energy, general health, and emotional function (SF-36), but only Consistency predicted cognitive decline (ECog) and SF-36 measures of physical health and pain. CONCLUSION: Grit is stable throughout older adulthood and may serve as a protective factor that promotes active adaptation to the developmental challenges of aging. Consistency of interests appears to play an adaptive role in all facets of successful aging, including stability of cognitive functioning, while perseverance of effort may have a more circumscribed positive effect on physical and emotional well-being in older adults.


Asunto(s)
Envejecimiento , Cognición , Adulto , Anciano , Envejecimiento/psicología , Escolaridad , Emociones , Humanos , Encuestas y Cuestionarios
10.
Aging Ment Health ; 26(5): 940-949, 2022 05.
Artículo en Inglés | MEDLINE | ID: mdl-34139133

RESUMEN

Objectives: Music-based interventions have received growing attention to improve quality of life for people diagnosed with dementia. Results of randomized controlled trials and meta-analytic reviews to date, however, reveal a lack of conclusive evidence for or against the effectiveness of such interventions. Herein, we critically review the basic assumptions and methodological issues ingrained in the cultures of research and care as they relate to evaluating music-based treatments for people with dementia, and propose a shift in the methodology by which music interventions are empirically evaluated.Method: We begin by reviewing existing barriers to achieving clarity on the effectiveness of music interventions, and we highlight methodological and sociocultural constraints that have limited our ability to reach concrete conclusions in research studies to-date. We then consider several key factors that have demonstrated relevance in matching people to specific music-based interventions. Based on these key factors, we developed a person-centered framework integrating elements from precision-medicine methodology to guide intervention studies.Results: Our organizing framework systematically integrates the following factors to inform the design of intervention studies: 1) person-centered goals and desired outcomes; 2) differences among individuals in clinical, cognitive, and historical attributes; and 3) the context of intervention and access to resources.Conclusion: Integration of the proposed framework into empirical investigations of music interventions for people living with dementia will inform precise and tailored interventions that will bring clarity to this growing body of research. Another aim of this framework is to foster a more humane, person-centered approach to our culture of care.


Asunto(s)
Demencia , Musicoterapia , Música , Demencia/psicología , Demencia/terapia , Humanos , Calidad de Vida
11.
Top Cogn Sci ; 14(2): 295-310, 2022 04.
Artículo en Inglés | MEDLINE | ID: mdl-34128585

RESUMEN

The loss of the ability to independently complete activities of daily living, such as meal preparation and household chores, is a defining characteristic of clinical dementia; however, minor difficulties in completing everyday activities emerge in the mild cognitive impairment stage, and even healthy older adults exhibit subtle functional difficulties compared to younger adults. These functional difficulties are associated with an array of negative outcomes, including decreased quality of life, higher costs of care, and increased frustration, depression, caregiver burden, and institutionalization. While cognitive models have been proposed to explain the functional deficits seen in dementia and subtler forms of cognitive decline, in contrast to other cognitive disorders such as aphasia, there are essentially no theoretically motivated interventions to address difficulties in everyday functioning. Proposed models of functional impairment share features with cognitive processing models of language, including hierarchical organization of representations and interactive, spreading activation; thus, an examination of aphasia interventions has the potential to inform the development of theoretically motivated interventions for everyday activities. This review first addresses the shared characteristics of cognitive models of everyday function and language, with a focus on linguistic production. Next, we will present aphasia interventions that target single-word production, sentence production, short-term memory, and semantics, and discuss their implications for everyday functioning interventions. We conclude with a discussion of limitations of the language-everyday functioning comparison as well as areas of future research.


Asunto(s)
Actividades Cotidianas , Demencia , Actividades Cotidianas/psicología , Anciano , Cognición/fisiología , Demencia/psicología , Humanos , Lenguaje , Pruebas Neuropsicológicas , Calidad de Vida
12.
J Alzheimers Dis ; 85(2): 627-644, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-34864658

RESUMEN

BACKGROUND: Actuarial and statistical methods have been proposed as alternatives to conventional methods of diagnosing mild cognitive impairment (MCI), with the aim of enhancing diagnostic and prognostic validity, but have not been compared in racially diverse samples. OBJECTIVE: We compared the agreement of consensus, actuarial, and statistical MCI diagnostic methods, and their relationship to race and prognostic indicators, among diverse older adults. METHODS: Participants (N = 354; M age = 71; 68% White, 29% Black) were diagnosed with MCI or normal cognition (NC) according to clinical consensus, actuarial neuropsychological criteria (Jak/Bondi), and latent class analysis (LCA). We examined associations with race/ethnicity, longitudinal cognitive and functional change, and incident dementia. RESULTS: MCI rates by consensus, actuarial criteria, and LCA were 44%, 53%, and 41%, respectively. LCA identified three MCI subtypes (memory; memory/language; memory/executive) and two NC classes (low normal; high normal). Diagnostic agreement was substantial, but agreement of the actuarial method with consensus and LCA was weaker than the agreement between consensus and LCA. Among cases classified as MCI by actuarial criteria only, Black participants were over-represented, and outcomes were generally similar to those of NC participants. Consensus diagnoses best predicted longitudinal outcomes overall, whereas actuarial diagnoses best predicted longitudinal functional change among Black participants. CONCLUSION: Consensus diagnoses optimize specificity in predicting dementia, but among Black older adults, actuarial diagnoses may be more sensitive to early signs of decline. Results highlight the need for cross-cultural validity in MCI diagnosis and should be explored in community- and population-based samples.


Asunto(s)
Disfunción Cognitiva/diagnóstico , Demencia/diagnóstico , Análisis Actuarial , Negro o Afroamericano , Anciano , Anciano de 80 o más Años , Cognición , Consenso , Progresión de la Enfermedad , Femenino , Humanos , Análisis de Clases Latentes , Masculino , Persona de Mediana Edad , Pruebas Neuropsicológicas , Pronóstico , Población Blanca
13.
Anesth Analg ; 132(6): 1502-1513, 2021 06 01.
Artículo en Inglés | MEDLINE | ID: mdl-33780389

RESUMEN

Postoperative cognitive dysfunction (POCD) has been reported with widely varying frequency but appears to be strongly associated with aging. Outside of the surgical arena, chronic and acute cerebral hypoxia may exist as a result of respiratory, cardiovascular, or anemic conditions. Hypoxia has been extensively implicated in cognitive impairment. Furthermore, disease states associated with hypoxia both accompany and progress with aging. Perioperative cerebral hypoxia is likely underdiagnosed, and its contribution to POCD is underappreciated. Herein, we discuss the various disease processes and forms in which hypoxia may contribute to POCD. Furthermore, we outline hypoxia-related mechanisms, such as hypoxia-inducible factor activation, cerebral ischemia, cerebrovascular reserve, excitotoxicity, and neuroinflammation, which may contribute to cognitive impairment and how these mechanisms interact with aging. Finally, we discuss opportunities to prevent and manage POCD related to hypoxia.


Asunto(s)
Envejecimiento/psicología , Hipoxia Encefálica/fisiopatología , Hipoxia Encefálica/psicología , Complicaciones Cognitivas Postoperatorias/fisiopatología , Complicaciones Cognitivas Postoperatorias/psicología , Envejecimiento/fisiología , Disfunción Cognitiva/fisiopatología , Disfunción Cognitiva/psicología , Humanos , Atención Perioperativa/métodos
14.
Neuropsychology ; 35(1): 3-18, 2021 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-33393796

RESUMEN

OBJECTIVE: This review describes the relatively small body of neuropsychological and cognitive research conducted over the past 100 years focused on theoretical models explaining the neurocognitive processes that support everyday functioning and the breakdown of functional abilities in the face of neurological damage or disease. METHOD: The historical roots of the theories of everyday activities based on direct observation of behavior in neurology and diary reports of everyday errors in cognitive psychology are presented, followed by a review of the empirical findings and resulting theoretical conceptualizations from case studies and group studies of various clinical populations in neuropsychology. RESULTS: We conclude with a new framework (the goal-control model) that integrates the most recent empirical findings in neuropsychology with mechanisms proposed by cognitive models. CONCLUSIONS: The goal-control model offers empirically supported solutions to understanding and predicting functioning in the real world. This new model generates testable predictions for future research and provides guidance for clinical assessment and interventions. (PsycInfo Database Record (c) 2021 APA, all rights reserved).


Asunto(s)
Actividades Cotidianas/psicología , Objetivos , Neuropsicología , Conducta , Cognición/fisiología , Humanos , Modelos Psicológicos
15.
Artículo en Inglés | MEDLINE | ID: mdl-32352347

RESUMEN

Mild functional difficulties associated with cognitive aging may be reliably measured by coding "micro-errors" during everyday tasks, like meal preparation. Micro-errors made by 25 older adult and 48 younger adults were coded on four dimensions to evaluate the influence of: 1) poor error monitoring; 2) goal decay; 3) competition for response selection when switching to a new subtask; and 4) interference from distractor objects. Micro-errors made by young adults under a dual task load also were analyzed to determine the influence of overall performance level. Older adults' micro-errors were observed when switching to a new subtask and to unrelated distractors. Slowed error monitoring and goal decay also influenced micro-errors in older adults, but not significantly more so than younger adults under the dual task. Interventions to reduce interference from distractors and to increase attention at critical choice points during tasks may optimize everyday functioning and preclude decline in older adults.


Asunto(s)
Actividades Cotidianas , Atención/fisiología , Envejecimiento Cognitivo/fisiología , Función Ejecutiva/fisiología , Desempeño Psicomotor/fisiología , Adulto , Factores de Edad , Anciano , Anciano de 80 o más Años , Femenino , Humanos , Masculino , Persona de Mediana Edad , Adulto Joven
16.
Neuroimage Clin ; 28: 102420, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32961404

RESUMEN

Neural models of obesity vary in their focus upon prefrontal and striatal differences. Animal and human studies suggest that differential functioning of the orbitofrontal cortex is associated with obesity. However, meta-analyses of functional neuroimaging studies have not found a clear relationship between the orbitofrontal cortex and obesity. Meta-analyses of structural imaging studies of obesity have shown mixed findings with regards to an association with reduced orbitofrontal cortex gray matter volume. To clarify these findings, we conducted a meta-analysis of 25 voxel-based morphometry studies, and found that greater body mass index is associated with decreased gray matter volume in the right orbitofrontal cortex (Brodmanns' areas 10 and 11), where family-wise corrected p < .05, N = 7,612. Use of the right orbitofrontal cortex as a seed in a Neurosynth Network Coactivation analysis showed that this region is associated with activity in the left frontal medial cortex, left temporal lobe, right precuneus cortex, posterior division of the left middle temporal gyrus, and right frontal pole. When Neurosynth Network Coactivation results were submitted as regions of interest in the Human Connectome Project data, we found that greater body mass index was associated with greater activity in left frontal medial cortex response to the Gambling Task, where p < .05, although this did not survive Bonferroni-correction. Our findings highlight the importance of the orbitofrontal cortex structure and functioning in neural models of obesity. Exploratory analyses suggest more studies are needed that examine the functional significance of reduced orbitofrontal cortex gray matter volume in obesity, and the effect of age and weight changes on this relationship using longitudinal designs.


Asunto(s)
Sustancia Gris , Imagen por Resonancia Magnética , Lóbulo Frontal , Sustancia Gris/diagnóstico por imagen , Humanos , Obesidad/diagnóstico por imagen , Corteza Prefrontal/diagnóstico por imagen
17.
Front Psychol ; 11: 123, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32116928

RESUMEN

Performance-based functional tests for the evaluation of daily living activities demonstrate strong psychometric properties and solve many of the limitations associated with self- and informant-report questionnaires. Virtual reality (VR) technology, which has gained interest as an effective medium for administering interventions in the context of healthcare, has the potential to minimize the time-demands associated with the administration and scoring of performance-based assessments. To date, efforts to develop VR systems for assessment of everyday function in older adults generally have relied on non-immersive systems. The aim of the present study was to evaluate the feasibility of an immersive VR environment for the assessment of everyday function in older adults. We present a detailed case report of an elderly woman who performed an everyday activity in an immersive VR context (Virtual Reality Action Test) with two different types of interaction devices (controller vs. sensor). VR performance was compared to performance of the same task with real objects outside of the VR system (Real Action Test). Comparisons were made on several dimensions, including (1) quality of task performance (e.g., order of task steps, errors, use and speed of hand movements); (2) subjective impression (e.g., attitudes), and (3) physiological markers of stress. Subjective impressions of performance with the different controllers also were compared for presence, cybersickness, and usability. Results showed that the participant was capable of using controllers and sensors to manipulate objects in a purposeful and goal-directed manner in the immersive VR paradigm. She performed the everyday task similarly across all conditions. She reported no cybersickness and even indicated that interactions in the VR environment were pleasant and relaxing. Thus, immersive VR is a feasible approach for function assessment even with older adults who might have very limited computer experience, no prior VR exposure, average educational experiences, and mild cognitive difficulties. Because of inherent limitations of single case reports (e.g., unknown generalizability, potential practice effects, etc.), group studies are needed to establish the full psychometric properties of the Virtual Reality Action Test.

18.
J Int Neuropsychol Soc ; 26(5): 503-514, 2020 05.
Artículo en Inglés | MEDLINE | ID: mdl-31964443

RESUMEN

OBJECTIVE: Relative to dementia, little is known about informant bias in mild cognitive impairment (MCI). We investigated the influence of informant demographic and relational characteristics on reports of everyday functioning using the Functional Activities Questionnaire (FAQ). METHOD: Four thousand two hundred eighty-four MCI participants and their informants from the National Alzheimer's Coordinating Center Uniform Data Set were included. Informants were stratified according to cohabitation, relationship, visit frequency, race/ethnicity, education, and sex. Informant-rated Mean FAQ score was compared across these groups using univariate general linear model analyses and post hoc tests. Interactions were tested between informant variables. The predictive contribution of informant variables to FAQ score was explored using hierarchical linear regression. Analyses covaried for participant cognition using a cognitive composite score, and for participant age, sex, and depression. RESULTS: After controlling for participant cognition, depression, age, and sex, informant-rated FAQ scores varied significantly across all informant variables (p's < .005, ηp2's ≤ .033) except sex and visit frequency. FAQ scores were higher (more impaired) among informants who cohabitate with the participant, among paid caregivers, spouses, and adult children, and among informants with higher levels of education. Scores were lowest (less impaired) among Black/African American informants as compared to all other racial/ethnic groups. CONCLUSIONS: Demographic and relational characteristics of informants influence the perception and reporting of instrumental activities of daily living in adults with MCI. As everyday functioning is crucial for differential diagnosis and treatment outcome measurement, it is important to be aware of sources of informant report discrepancies.


Asunto(s)
Actividades Cotidianas/psicología , Disfunción Cognitiva/diagnóstico , Adulto , Anciano , Anciano de 80 o más Años , Concienciación , Cognición , Escolaridad , Femenino , Humanos , Masculino , Persona de Mediana Edad , Pruebas Neuropsicológicas , Variaciones Dependientes del Observador , Encuestas y Cuestionarios
19.
J Int Neuropsychol Soc ; 26(3): 303-313, 2020 03.
Artículo en Inglés | MEDLINE | ID: mdl-31668159

RESUMEN

OBJECTIVE: The Everyday Compensation scale (EComp) is an informant-rated questionnaire designed to measure cognitively based compensatory strategies that support both everyday memory and executive function in the context of completing instrumental activities of daily living (IADLs). Although previous findings provided early support for the usefulness of the initial version of EComp, the current paper further describes the development, refinement, and validation of EComp as a new assessment tool of compensation for IADLs. METHOD: Confirmatory factor analysis (CFA) was used to examine its factor structure. Convergent and predictive validity was evaluated by examining the relationship between EComp and markers of disease, including diagnosis, cognitive change, and trajectories of functional abilities. RESULTS: CFA supported a general compensation factor after accounting for variance attributable to IADL domain-specific engagement. The clinical groups differed in compensatory strategy use, with those with dementia using significantly fewer compensatory strategies as compared to individuals with normal cognition or mild cognitive impairment. Greater levels of compensation were related to better cognitive functions (memory and executive function) and functional abilities, as well as slower rates of cognitive and functional decline over time. Importantly, higher levels of compensation were associated with less functional difficulties and subsequently slower rate of functional decline independent of the level of cognitive impairment. CONCLUSIONS: Engagement in compensatory strategies among older adults has important implications for prolonging functional independence, even in those with declining cognitive functioning. Results suggest that the revised EComp is likely to be useful in measuring cognitively based compensation in older adults.


Asunto(s)
Actividades Cotidianas , Envejecimiento Cognitivo , Disfunción Cognitiva/diagnóstico , Demencia/diagnóstico , Función Ejecutiva , Pruebas Neuropsicológicas/normas , Psicometría/normas , Anciano , Anciano de 80 o más Años , Envejecimiento Cognitivo/fisiología , Disfunción Cognitiva/fisiopatología , Demencia/fisiopatología , Función Ejecutiva/fisiología , Análisis Factorial , Femenino , Humanos , Estudios Longitudinales , Masculino , Reproducibilidad de los Resultados , Encuestas y Cuestionarios
20.
Ann Thorac Surg ; 108(5): 1583-1584, 2019 11.
Artículo en Inglés | MEDLINE | ID: mdl-31653293
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