#SpatialMemory

Patrick Marques

@pmarques35.bsky.social

1 day ago

Capables de cartographier des milliers de kilomètres carrés, les corbeaux ne sont pas les perdreaux de l’année Une vaste étude publiée par «Science» jeudi montre que les corvidés mobilisent des capacités de navigation et de mémoire spatiale bien plus sophistiquées que ce que pensaient les chercheurs pour profi...

[1/6] INSOLITE - Matthias-Claudio Loretto (Univ Vienne) et John Marzluff (Univ Washington) montrent que les corbeaux possèdent des capacités de navigation spatiale très développées. L'étude publiée dans Sciences analyse leurs déplacements à Yellowstone. #geography #animalnavigation #spatialmemory

JMIR Publications

@jmirpub.bsky.social

2 weeks ago

Egocentric Spatial Memory Deficit in Amnestic Mild Cognitive Impairment Revealed Through Virtual Reality: Cross-Sectional Study Background: Spatial navigation relies on egocentric and allocentric frames of reference, with the latter critically impaired in Alzheimer disease (AD) due to hippocampal involvement. Recent evidence suggests that egocentric representations may coexist within medial temporal lobe regions; however, their relative impairment in the early stages of AD remains unclear. Virtual reality offers a promising approach to bridge this gap by assessing spatial navigation abilities and providing sensitive digital biomarkers for AD. Objective: This study investigates spatial memory performance in individuals with amnestic mild cognitive impairment (aMCI) using a virtual reality object-location memory task that manipulated available cues during recall. An environmental boundary probed hippocampal-dependent allocentric processing, while a discrete landmark probed striatal-dependent egocentric strategies. Methods: Eighty participants (40 individuals with aMCI and 40 healthy controls [HC]) encoded object locations in a virtual arena and recalled them using either landmark or boundary cues. Results: Regardless of the spatial frame of reference, patients with aMCI demonstrated significantly poorer overall spatial memory than the HC group. Surprisingly, virtual egocentric error emerged as a predictor of aMCI diagnosis. No differences were observed in frame-switching, object-location binding, or across recall trials. Analysis of virtual encoding paths revealed that patients with aMCI exhibited centrifugal navigation away from the discrete landmark and toward the boundary of the arena. During recall, patients with aMCI demonstrated less effective usage of boundary and landmark cues than HC, as revealed by the distribution of response coordinates. Conclusions: These findings indicate that, in addition to well-documented allocentric deficits, egocentric spatial memory impairments provide a complementary and potentially sensitive marker within the AD continuum. This dual impairment of spatial cognition systems may enhance our understanding of navigational difficulties in aMCI and offers insight into the nature of spatial representations in aging.

New in JMIR Aging: Egocentric Spatial Memory Deficit in Amnestic Mild Cognitive Impairment Revealed Through Virtual Reality: Cross-Sectional Study #Alzheimer #CognitiveImpairment #VirtualReality #SpatialMemory #Neuroscience

GetNews.me

@getnews-me.bsky.social

5 months ago

LLM Agents Gain Coherent Spatial Memory via Graph Rectification

Researchers released a framework on 5 Oct 2025 that adds graph building to LLM agents. An Edge Impact Score ranks errors for fixes, improving map correctness on MANGO benchmark. Read more: getnews.me/llm-agents-gain-coherent... #llm #spatialmemory

GetNews.me

@getnews-me.bsky.social

5 months ago

mindmap: Spatial Memory Boosts 3D Robot Action Policies

Researchers introduced mindmap, a spatial‑memory system that adds a 3D map to robot control. Simulations show success rates and fewer corrective motions when objects vanish from view. Read more: getnews.me/mindmap-spatial-memory-b... #spatialmemory #robotics

GetNews.me

@getnews-me.bsky.social

5 months ago

New 3D Diffusion Policy Enhances Spatial Memory for Robot Actions

Mindmap fuses semantic 3D reconstruction with diffusion‑based planning, giving robots persistent spatial memory to locate objects after they leave view, boosting efficiency. getnews.me/new-3d-diffusion-policy-... #robotics #spatialmemory

@arxivlens.bsky.social

7 months ago

Change-resistance distinguishes the representational geometries of human spatial memory and mouse CA1 in deformed environments
Barrett, R. E., Behery, D. G. et al.
Paper
Details
#ChangeResistance #SpatialMemory #CA1Neurons

@arxivlens.bsky.social

8 months ago

Point3R: Streaming 3D Reconstruction with Explicit Spatial Pointer
Memory
Jie Zhou, Jiwen Lu et al.
Paper
Details
#3DReconstruction #SpatialMemory #Point3RTechnology

@arxivlens.bsky.social

8 months ago

Functional assessments of short-term spatial memory in the Dog Aging Project identify strong associations with age that are not moderated by body mass
Alexander, G. E., Block, T. A. et al.
Paper
Details
#DogAgingProject #SpatialMemory #AgeRelatedAssociations

KStrategy&

@kstrategyand.bsky.social

1 year ago

Harnessing Neuroplasticity: A Mobile App That Improves Aging Brain Function As we age, cognitive functions such as spatial memory and navigation abilities often decline. This is a hallmark of normal aging, but it can also signal the onset of more serious conditions like Alzhe...

www.linkedin.com/pulse/harnes...

Harnessing Neuroplasticity: A Mobile App That Improves Aging Brain Function

kstrategyand.com

#AgingBrain #CognitiveDecline #Neuroplasticity #SpatialMemory #MemoryImprovement #InnovationInHealthcare #Humanteconomy #Humantec #KStrategyand

Abid Hussaini

@hussainilab.bsky.social

1 year ago

Interested in how spatial coding is impaired in the medial entorhinal cortex? Join Gustavo Rodriguez on Thursday, 27th June at #FENS2024 to hear about it.
Poster nr: PS04-27PM-531
#spatialmemory #dementia #alzheimers