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Objectives: Global cognitive changes in older age affect driving behavior and road safety, but how spatial orientation differences affect driving behaviors is unknown on a population level, despite clear implications for driving policy and evaluation during aging. The present study aimed to establish how spatial navigation changes affect driving behavior and road safety within a large cohort of older adults.
Methods: Eight hundred and four participants (mean age: 71.05) were recruited for a prospective cohort study. Participants self-reported driving behavior followed by spatial orientation (allocentric and egocentric) testing and a broader online cognitive battery (visuomotor speed, processing speed, executive functioning, spatial working memory, episodic memory, visuospatial functioning).
Results: Spatial orientation performance significantly predicted driving difficulty and frequency. Experiencing more driving difficulty was associated with worse allocentric spatial orientation, processing speed, and source memory performance. Similarly, avoiding challenging driving situations was associated with worse spatial orientation and episodic memory. Allocentric spatial orientation was the only cognitive domain consistently affecting driving behavior in under 70 and over 70 age groups, a common age threshold for driving evaluation in older age.
Discussion: We established for the first time that worse spatial orientation performance predicted increased driving difficulty and avoidance of challenging situations within an older adult cohort. Deficits in spatial orientation emerge as a robust indicator of driving performance in older age, which should be considered in future aging driving assessments, as it has clear relevance for road safety within the aging population.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10872713 | PMC |
http://dx.doi.org/10.1093/geronb/gbad188 | DOI Listing |
Carbohydr Res
September 2025
Area for Molecular Function, Division of Material Science, Graduate School of Science and Engineering, Saitama University, Sakura, Saitama, 338-8570, Japan; Medical Innovation Research Unit (MiU), Advanced Institute of Innovative Technology (AIIT), Saitama University, Sakura, Saitama, 338-8570, Japa
Multivalent interactions between lectins and glycans are crucial for biological recognition; however, predicting functional inhibition based on binding affinity remains challenging. Herein, we investigated a series of structurally defined N-acetylglucosamine (GlcNAc)-functionalized dendrimers (1a-1c and 2a-2c) to examine how spatial orientation and temperature influenced the inhibition of wheat germ agglutinin (WGA). Using enzyme-linked lectin assays (ELLAs), we observed biphasic inhibition profiles for all the dendrimers, characterized by an initial enhancement of WGA binding at low concentrations, followed by effective inhibition at higher concentrations.
View Article and Find Full Text PDFThe microtubule cytoskeleton is comprised of dynamic, polarized filaments that facilitate transport within the cell. Polarized microtubule arrays are key to facilitating cargo transport in long cells such as neurons. Microtubules also undergo dynamic instability, where the plus and minus ends of the filaments switch between growth and shrinking phases, leading to frequent microtubule turnover.
View Article and Find Full Text PDFJ Mol Biol
September 2025
Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA; Department of Cell and Developmental Biology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA. Electronic address:
The precise spatial and temporal regulation of gene expression through enhancer-promoter (E-P) interactions represents a fundamental mechanism underlying cellular differentiation and organismal development in multicellular eukaryotes. Despite extensive studies on enhancer-mediated gene regulation, a systematic understanding of how specific E-P configurations affect transcriptional dynamics remains incomplete. Recent advances in live-imaging, single-cell assays, and chromatin conformation capture technologies have enabled unprecedented insights into these dynamic regulatory processes by providing temporal resolution and single-cell specificity that complement traditional population-based approaches.
View Article and Find Full Text PDFBehav Processes
September 2025
University of Rostock, Institute for Biosciences, Neuroethology, Rostock, Germany. Electronic address:
Reversal learning (RL) experiments explore cognitive flexibility and decision-making processes. Specifically, RL examines the extent and speed at which individuals adapt their choices when reward contingencies change after the point of reversal. One variation of RL is the midsession reversal learning experiment (MRL), in which the point of reversal occurs midway through a session.
View Article and Find Full Text PDFElife
September 2025
Hefei National Research Center for Physical Sciences at the Microscale and Department of Physics, University of Science and Technology of China, Hefei, China.
The opportunistic pathogen serves as a model organism for studying multiple signal transduction pathways. The chemoreceptor cluster, a core component of the chemotaxis pathway, is assembled from hundreds of proteins. The unipolar distribution of receptor clusters has long been recognized, yet the precise mechanism governing their assembly remains elusive.
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