Joaquín Migeot

• M.Sc. Ph.D.
• Atlantic Fellow for Equity in Brain Health at Global Brain Health Institute

Background While education is crucial for brain health, evidence mainly relies on individual measures of years of education (YoE), neglecting education quality (EQ). The effect of YoE and EQ on aging and dementia has not been compared. Methods We conducted a cross-sectional assessment of the effect of EQ and YoE on brain health in 7533 subjects fr...

Background Dysfunctional allostatic-interoception, altered processing of bodily signals in response to environmental demands, occurs in behavioural-variant frontotemporal dementia (bvFTD) patients. Previous research has not investigated the dynamic nature of interoception using methods like intrinsic neural timescales. We hypothesised that longer i...

Introduction: Evidence suggests an association between excess weight and low cognitive performance; however, findings are inconsistent due to variations in measurement approaches. Further research is needed to explore this link, considering factors such as physical activity and education level. Objective: this study aimed to: (a) identify possible...

The growing participation of older adults in travel is reshaping this industry and highlighting the need for inclusive travel experiences, particularly for people living with dementia (PLwD). While travel provides substantial physical, psychological, cognitive and social benefits that promote active and healthy ageing, it also presents significant...

Background Socioeconomic disparities (SED) influence brain health and dementia. Latin America (LA) is characterized by high SED and a disproportionate prevalence of Alzheimer’s disease (AD) and frontotemporal lobe degeneration (FTLD) compared to high‐income populations like the United States (US). However, the impact of SED on brain reserve across...

Background Verbal fluency tasks are routinely employed in screening for mild cognitive impairment (MCI). Yet, traditional outcome measures focus on the number of valid responses, failing to reveal which specific semantic memory dimensions may be altered and limiting analyses to univariate methods. Building on recent findings on Alzheimer’s disease,...

Background Predicting Alzheimer's disease (AD) and frontotemporal dementia (FTD) using polygenic risk scores (PRS) for late‐onset forms holds promise, but its accuracy might be influenced by social determinants of health (SDOH). This study explores how considering SDOH alongside genes can improve prediction, focusing on potential differences for ea...

Structural inequality, the uneven distribution of resources and opportunities, influences health outcomes. However, the biological embedding of structural inequality in aging and dementia, especially among underrepresented populations, is unclear. We examined the association between structural inequality (country-level and state-level Gini indices)...

Background Structural income inequality – the uneven income distribution across regions or countries – could affect brain structure and function, beyond individual differences. However, the impact of structural income inequality on the brain dynamics and the roles of demographics and cognition in these associations remains unexplored. Methods Here...

Brain clocks, which quantify discrepancies between brain age and chronological age, hold promise for understanding brain health and disease. However, the impact of diversity (including geographical, socioeconomic, sociodemographic, sex and neurodegeneration) on the brain-age gap is unknown. We analyzed datasets from 5,306 participants across 15 cou...

BACKGROUND Education influences brain health and dementia. However, its impact across regions, specifically Latin America (LA) and the United States (US), is unknown. METHODS A total of 1412 participants comprising controls, patients with Alzheimer's disease (AD), and frontotemporal lobar degeneration (FTLD) from LA and the US were included. We st...

Models of healthy aging are typically based on the United States and Europe and may not apply to diverse and heterogeneous populations. In this study, our objectives were to conduct a meta-analysis to assess risk factors of cognition and functional ability across aging populations in Latin America and a scoping review focusing on methodological pro...

The lifespan is influenced by adverse childhood experiences that create predispositions to poor health outcomes. Here we propose an allostatic framework of childhood experiences and their impact on health across the lifespan, focusing on Latin American and Caribbean countries. This region is marked by significant social and health inequalities nest...

Recent integrative multilevel models offer novel insights into the etiology and course of neurodegenerative conditions. The predictive coding of allostatic-interoception theory posits that the brain adapts to environmental demands by modulating internal bodily signals through the allostatic-interoceptive system. Specifically, a domain-general allos...

Brain clocks, which quantify discrepancies between brain age and chronological age, hold promise for understanding brain health and disease. However, the impact of multimodal diversity (geographical, socioeconomic, sociodemographic, sex, neurodegeneration) on the brain age gap (BAG) is unknown. Here, we analyzed datasets from 5,306 participants acr...

Cognitive studies on Parkinson’s disease (PD) reveal abnormal semantic processing. Most research, however, fails to indicate which conceptual properties are most affected and capture patients’ neurocognitive profiles. Here, we asked persons with PD, healthy controls, and individuals with behavioral variant frontotemporal dementia (bvFTD, as a disea...

Background Though central to dementia assessments, verbal fluency tasks are suboptimally exploited. Performance is typically measured by counting valid responses. This precludes insights on which word types are least accessible to patients, while failing to discriminate among disorders. Alternatively, each word can be decomposed into relevant prope...

INTRODUCTION Verbal fluency tasks are common in Alzheimer's disease (AD) assessments. Yet, standard valid response counts fail to reveal disease‐specific semantic memory patterns. Here, we leveraged automated word‐property analysis to capture neurocognitive markers of AD vis‐à‐vis behavioral variant frontotemporal dementia (bvFTD). METHODS Patient...

Anticipating social stress evokes strong reactions in the organism, including interoceptive modulations. However, evidence for this claim comes from behavioral studies, often with inconsistent results, and relates almost solely to the reactive and recovery phase of social stress exposure. Here, we adopted an allostatic-interoceptive predictive codi...

Individuals with autism spectrum disorder (ASD) present difficulties in integrating mental state information in complex moral tasks. Yet, ASD research has not examined whether this process is influenced by emotions, let alone while capturing its neural bases. We investigated how language-induced emotions modulate intent-based moral judgment in ASD....

Social emotions are critical to successfully navigate in a complex social world because they promote self‐regulation of behaviour. Difficulties in social behaviour are at the core of autism spectrum disorder (ASD). However, social emotions and their neural correlates have been scarcely investigated in this population. In particular, the experience...

Recent allostatic‐interoceptive predictive coding theories propose that efficient regulation of the internal milieu is necessary to correctly anticipate the needs required to overcome environmental challenges before they arise. These theories are based on neurocognitive models of allostatic load and interoceptive processes, dimensions convergently...

Socioeconomic status (SES) negatively impacts cognitive and executive functioning in older adults, yet its effects on socioemotional abilities have not been studied in this population. Also, evidence on neurocognitive processes associated with aging primary comes from Western, educated, industrialized, rich, and democratic (WEIRD) populations, hind...

Recent allostatic–interoceptive explanations using predictive coding models propose that efficient regulation of the body’s internal milieu is necessary to correctly anticipate environmental needs. We review this framework applied to understanding behavioral variant frontotemporal dementia (bvFTD) considering both allostatic overload and interocept...

Socioeconomic status (SES) negatively impacts cognitive and executive functioning in older adults, yet its effects on socioemotional abilities have not been studied in this population. Also, evidence on neurocognitive processes associated with ageing primarily comes from Western, educated, industrialized, rich, and democratic (WEIRD) populations, h...

Simposio Humberto Maturana 1928-2021. La sección Simposio de autor de la revista Estudios Públicos es un espacio para elanálisis de las ideas y obra de un pensador clásico o contemporáneo desde distintas perspectivas disciplinares.

Metacognition (monitoring) of emotion recognition is fundamental for social interactions. Correct recognition of and confidence in the emotional meaning inferred from others’ faces are fundamental for guiding and adjusting interpersonal behavior. Yet, although emotion recognition impairments are well documented across neurodegenerative diseases, th...

Background The capacity to ascertain other people’s emotional states is crucial for establishing and maintaining social interactions. In particular, accurate recognition of facial expressions and beliefs about whether we trust what a face transmits are fundamental for guiding and adjusting this social behavior. Yet, although emotion recognition imp...

Pacientes con la enfermedad de Alzheimer (EA) y la variante conductual de la demencia frontotemporal (vcDFT) presentan déficits en la metacognición y el reconocimiento emocional, específicamente vcDFT en el asco y las emociones negativas, lo cual se ha ligado al desajuste de la conducta con su entorno. A pesar de que estos déficits están documentad...

Reflexiones acerca de las influencias que la educación de mercado tiene en la manera en que evocamos propiedades asociadas a conceptos abstractos. Acá el link de la presentación: https://www.youtube.com/watch?v=IbafaBHVU88&feature=youtu.be&fbclid=IwAR1qH4CgSFEXEmr8XgkFY5SLCKyXNJZ3gCjgSSfgf-7QQkHWeEaIFfmQJY4

En la tarea de listado de propiedades (TLP) las personas deben listar propiedades asociadas a un concepto. Se espera que este proceso sea mediado por la Memoria de Trabajo (MT) y Funciones Ejecutivas (FE), quienes extraen propiedades de la Memoria de Largo Plazo (MLP) para listarlas. El objetivo de investigación fue observar diferencias de desempeñ...