Late-onset Alzheimer's disease (AD) disproportionately affects women compared to men. Episodic memory decline is one of the earliest and most pronounced deficits observed in AD. However, it remains unclear whether sex influences episodic memory-related brain function in cognitively intact older adults at risk of developing AD. Here we used task-based multivariate partial least squares analysis to examine sex differences in episodic memory-related brain activity and brain activity-behavior correlations in a matched sample of cognitively intact older women and men with a family history of AD from the PREVENT-AD cohort study in Montreal, Canada (M=63.03±3.78; M=15.41±3.40). We observed sex differences in task-related brain activity and brain activity-behavior correlations during the encoding of object-location associative memories and object-only item memory, and the retrieval of object only item memories. Our findings suggest a generalization of episodic memory-related brain activation and performance in women compared to men. Follow up analyses should test for sex differences in the relationship between brain activity patterns and performance longitudinally, in association with risk factors for AD development. This article is part of the Virtual Special Issue titled COGNITIVE NEUROSCIENCE OF HEALTHY AND PATHOLOGICAL AGING. The full issue can be found on ScienceDirect at https://www.sciencedirect.com/journal/neurobiology-of-aging/special-issue/105379XPWJP.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.neurobiolaging.2021.03.009 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Background: In humans, environmental enrichment (EE), as measured by the engagement in a variety of leisure activities, has been associated with larger hippocampal structure and better memory function. The present cross-sectional study assessed whether EE during early life (13-30 years) and midlife (30-65 years) is associated with better preserved memory-related brain activity patterns in older age.
Methods: In total, 372 cognitively unimpaired older adults (aged ≥60 years old) of the DZNE-Longitudinal Study on Cognitive Impairment and Dementia (DELCODE; DRKS00007966) were investigated.
Chelidonic acid abrogates oxidative stress and memory dysfunction in experimental aging rats.
Turk J Biol
October 2024
Neuropyschopharmacology Application and Research Center, Üsküdar University, İstanbul, Turkiye.
Background/aim: In an aging model established using male Wistar albino rats via the administration of D-galactose (D-gal), the aim of this study was to examine the effects of chelidonic acid (CA) on cognitive function and the levels of glutathione (GSH), malondialdehyde (MDA), total antioxidant status (TAS), and brain-derived neurotrophic factor (BDNF).
Materials And Methods: Thirty-two, three-month-old Wistar albino male rats (n = 8) were divided into four groups, as the control (C) group, CA group (2 mg/kg of CA via oral gavage), D-gal group (150 mg/kg of D-gal, subcutaneously), and D-gal + CA group (150 mg/kg of D-gal and 2 mg/kg of CA). Following overnight fasting, the 10-week trial was concluded with intramuscular injections of anesthetic drugs xylazine (8-10 mg/kg) and ketamine (80-100 mg/kg), and subsequently, the collection of cardiac blood.
Temporal ablation of the ciliary protein IFT88 alters normal brainwave patterns.
Sci Rep
January 2025
Department of Molecular, Cellular, and Biomedical Sciences, College of Life Sciences and Agriculture, University of New Hampshire, Durham, NH, 03824, USA.
Article Synopsis
- The primary cilium is a crucial organelle involved in various signaling pathways, and its dysfunction is linked to conditions like Bardet-Biedl syndrome, Alzheimer's, and autism, all of which can lead to cognitive impairment.
- Researchers studied the effects of temporarily disabling the IFT88 gene, vital for cilia formation, in adult mice to understand cilia's role in brain activity.
- The findings showed that mice lacking functional cilia had significant learning deficits and abnormal brainwave patterns, emphasizing the importance of primary cilia for proper neural function and memory in adults.
Association Between Depressive Symptoms and Comorbidities Among Elderly Diabetic Individuals in China.
Brain Behav
January 2025
Department of Neurology, the Second Affiliated Hospital, Jiangxi Medical College, Nanchang University, Nanchang, Jiangxi, China.
Background: Diabetic individuals are at an increased risk of mental illness and comorbidities. However, the precise association between depressive symptoms and comorbidity remains uncertain. Our study aimed to investigate this relationship among elderly Chinese diabetic patients.
View Article and Find Full Text PDFExploring memory-related network via dorsal hippocampus suppression.
Netw Neurosci
December 2024
Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA, USA.
Memory is a complex brain process that requires coordinated activities in a large-scale brain network. However, the relationship between coordinated brain network activities and memory-related behavior is not well understood. In this study, we investigated this issue by suppressing the activity in the dorsal hippocampus (dHP) using chemogenetics and measuring the corresponding changes in brain-wide resting-state functional connectivity (RSFC) and memory behavior in awake rats.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!