Clinical Manifestations.

Background: Evidence from multiple converging sources has demonstrated the clear benefits of physical activity in promoting mental health and improving cognitive function. However, more than 54% of Indians do not engage in the recommended amount of physical activity. The present study aims to explore the association of physical activity with cognitive abilities among the elderly aging population in an urban Indian setting.

Clinical Manifestations.

Background: Frailty, synonymous with physical vulnerability and decline, may exert nuanced effects on cognitive functions.(Borges, Canevelli, Cesari, & Aprahamian, 2019) This study assesses possible association between frailty and cognitive performance with the aim of identifying vulnerable cognitive domains.

Method: We analysed the baseline data from Tata Longitudinal Study of Ageing (TLSA)(Sundarakumar et al.

Clinical Manifestations.

Background: In the early stages of typical Alzheimer's disease, there is a well-documented pattern of memory deficits, especially episodic memory, substantiated with evidence of medial temporal lobe atrophy, specifically of the hippocampus in line with the memory deficits. Studies have shown that several other demographic, biological, and lifestyle factors influence memory and there is a need for identifying early risk factors and for the development of clinical intervention programs to delay or prevent cognitive decline. Therefore, the objective of this study is to explore the impact of various factors on episodic memory decline in an urban cohort.

Clinical Manifestations.

Background: Dementia, a global health challenge, drives the need for comprehensive understanding. Longitudinal cohort studies are vital, yet maintaining follow-up in dementia cohorts poses challenges. This study explores challenges in follow-up, refines protocols, and develops strategies that can elevate dementia research quality.

Clinical Manifestations.

Background: Recent epidemiological studies have shown that diabetes can have negative effects on cognitive function, and insulin resistance (IR) acts as a key factor in this association. IR can impede glucose uptake in brain, leading to energy deficits and toxic protein accumulation which may cause cognitive decline. Type 3 diabetes mellitus (T3DM), or AD type of diabetes is caused due to impaired insulin signalling restricted to brain regions, resulting in memory decline.

Clinical Manifestations.

Background: Refractive errors are common visual comorbidities among the elderly. Cognitive dysfunction also occurs in this population. A study by Ong et al (2013) demonstrated an association of refractive errors with poor cognitive performance.

Clinical Manifestations.

Background: Cognitive control deficits can be early indicators of cognitive decline in individuals. Studies have found a bilingual advantage in cognitive control, however, there is little research on the Indian population, particularly those residing in rural areas. We aimed to investigate how cognitive control is influenced by the number of languages known to individuals among the aging population in both urban and rural settings in South India.

Clinical Manifestations.

Background: Visuo-cognitive skills represent a network of different abilities that rely on vision and cognition. While visuo-cognitive abilities have been considered prominent indicators of dementia, there is a dearth of studies that profile these abilities with demographic correlates in an aging Indian population. Investigating the pattern of visuo-cognitive abilities is essential to facilitate early indication, better prognosis and treatment of symptoms.

Clinical Manifestations.

Background: Pulmonary Function Tests (PFTs) are the non-invasive tests to measure the lung function. Relationship between pulmonary function and cognition is an emerging area of research, understanding this is crucial for prevention and management of dementia. Hence this study aims to investigate the association between pulmonary function and cognition.

Clinical Manifestations.

Background: Auditory attention and memory are the understudied aspects of cognition. Poor performance on cognitive tasks is assumed to be due to peripheral hearing loss, which is not always the case. Auditory processing issues may affect the auditory recall and attention tasks even though the hearing and cognition are normal.

Heart Rate and its Variability From Short-Term ECG Recordings as Potential Biomarkers for Detecting Mild Cognitive Impairment.

Alterations in Heart Rate (HR) and Heart Rate Variability (HRV) reflect autonomic dysfunction associated with neurodegeneration making them biomarkers suitable for detecting Mild Cognitive Impairment (MCI). The study involves 297 urban Indian participants [48.48% (144) were male and 51.

Prevalence of hypothyroidism in older adults and its association with cognition: a cross-sectional study from a South Indian ageing urban cohort.

The study conducted on a South Indian urban cohort aimed to emphasize the prevalence and patterns of hypothyroidism and its association with cognition among individuals aged 45 years and above. A cross-sectional design was adopted, utilizing data from the Tata Longitudinal Study of Aging cohort, comprising 1201 non-demented participants in Bangalore, South India. The study contains detailed clinical assessments, including medical history, physical examination and cognitive tests such as the COGNITO battery, Hindi Mental State Examination and Addenbrooke's Cognition Examination III.

Hyperhomocysteinemia and its effect on ageing and language functions - HEAL study.

Hyperhomocysteinemia or high levels (> 15 µmol/L) of homocysteine (Hcy)in the blood has been suggested to affect the brain through vascular and neurodegenerative pathways and potentially impact cognition. The current study aims to explore the association of high homocysteine with cognition and brain volume changes in a cohort of middle and old agedr adults. The study recruited 1296 participants aged ≥ 45 years from Tata Longitudinal Study of Ageing (TLSA), an ongoing cohort study.

Recurrent endothelin-1 mediated vascular insult leads to cognitive impairment protected by trophic factor pleiotrophin.

Vascular dementia (VaD) is a complex neurodegenerative condition, with cerebral small vessel dysfunctions as the central role in its pathogenesis. Given the lack of suitable animal models to study the disease pathogenesis, we developed a mouse model to closely emulate the clinical scenarios of recurrent transient ischemic attacks (TIAs) leading to VaD using vasoconstricting peptide Endothelin-1(ET-1). We observed that administration of ET-1 led to blood-brain barrier (BBB) disruption and detrimental changes in its components, such as endothelial cells and pericytes, along with neuronal loss and synaptic dysfunction, resulting in irreversible memory loss.

Association between APOE genotypes and metabolic syndrome in a middle aged and elderly Urban South Indian population.

Background: This study examines the association between apolipoprotein E (APOE) genotypes and metabolic syndrome (MetS) in an older urban population in South India, as part of the Tata Longitudinal Study on Aging.

Methods: A total of 618 participants aged 45 and above were analyzed cross-sectionally for the association between APOE carrier status and MetS (based on both NCEP ATP III and Consensus criteria).

Results: Despite the high prevalence of MetS observed in this cohort (51.

Effect of early menopause on cognition and brain morphology in an Urban Indian Cohort.

Background: Evidence for the effect of early menopause on cognition among older women is not consistent and is scant among the Indian population.

Methods: We aimed to examine the effect of early menopause (≤45 years) on cognitive performance and brain morphology among older dementia-free females of the TLSA cohort using a multiple linear regression analysis.

Results: In a sample of 528 women, 144 (27%) had early menopause.

Alteration in amygdala subfield volumes and their association with cognition in mild cognitive impairment.

Background: The amygdala has an important role in cognitive and affective functions. The involvement of amygdala and related limbic structures is implicated in many aspects of memory and emotion in mild cognitive impairment (MCI). In the present study, we aimed to compare the volumetric measurements of amygdala and its subfields as well as their association with cognitive functions in stable MCI (sMCI).

Prevalence and patterns of vitamin D deficiency and its role in cognitive functioning in a cohort from South India.

Vitamin D (VitD) is a naturally occurring, fat-soluble vitamin which regulates calcium and phosphate homeostasis in the human body and is also known to have a neuroprotective role. VitD deficiency has often been associated with impaired cognition and a higher risk of dementia. In this study, we aimed to explore the relationship between levels of VitD and cognitive functioning in adult individuals.

Transcranial direct current stimulation-efficacy in mild cognitive impairment: A meta-analysis.

Objectives: Mild cognitive impairment (MCI) is a transition state in which individuals have cognitive abilities that are in between those of normal aging and dementia. Although not everyone with MCI develops dementia, the risk of progression to dementia is higher in people with MCI. Interventions at this stage can prevent or delay the onset of dementia.