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22 results for “spatial navigation”
Embodied Spatial Navigation Training in Mild Cognitive Impairment: A Proof-of-Concept Trial
<p>Raw data of included cognitive test and VR data Starting Grant Ricerca Finalizzata, code: SG-2018-12368175</p>
Bodily and Visual-Cognitive Navigation Aids to Enhance Spatial Recall in Mild Cognitive Impairment
<p>Individuals with mild cognitive impairment (MCI) syndrome often report navigation difficulties, accompanied by impairments in egocentric and allocentric spatial memory. However, studies have shown that both bodily cues (e.g., motor commands, proprioception, vestibular information) and visual-cognitive cues (e.g., maps, directional arrows, attentional markers) can support spatial memory in MCI. These aids offer valuable insights for designing navigation training programs in aging. Fifteen MCI patients were recruited for this study. Their egocentric and allocentric memory recall performances were tested through a navigation task with five different virtual reality (VR) assistive encoding procedures (bodily, vision only, interactive allocentric map, reduced executive load, free navigation without cues). Bodily condition consisted of an immersive VR setup to engage self-motion cues, vision only condition consisted of passive navigation without interaction, in the interactive allocentric map condition patients could use a bird-view map, in the reduced executive load condition directional cues and attentional markers were employed, and during free navigation no aid was implemented. Bodily condition improved spatial memory compared to vision only and free navigation without cues. In addition, the interactive allocentric map was superior to the free navigation without cues. Surprisingly, the reduced executive load was comparable to vison only condition. Moreover, a detrimental impact of free navigation was observed on allocentric memory across testing trials. These findings challenge the notion of an amodal representation of space in aging, suggesting that spatial maps can be affected by the modality in which the environment was originally encoded.</p>
Interindividual differences influence multisensory processing during spatial navigation
<p>The dataset contains the raw data from two experiments. We investigate the ability of using auditory, visual or audiovisual landmarks for spatial navigation through the environment.</p>
Spatial modulation of visual responses arises in cortex with active navigation
<p>During navigation, the visual responses of neurons in mouse primary visual cortex (V1) are modulated by the animal's spatial position. Here we show that this spatial modulation is similarly present across multiple higher visual areas but negligible in the main thalamic pathway into V1. Similar to hippocampus, spatial modulation in visual cortex strengthens with experience and with active behavior. Active navigation in a familiar environment, therefore, enhances the spatial modulation of visual signals starting in the cortex.</p>
Data from: Spatial encoding in primate hippocampus during free navigation
<p>The hippocampus comprises two neural signals – place cells and theta oscillations - that contribute to facets of spatial navigation. While their complementary relationship has been well established in rodents, their respective contributions in the primate brain during free navigation remains unclear. Here we recorded neural activity in the hippocampus of freely-moving marmosets as they naturally explored a spatial environment to more explicitly investigate this issue. We report place cells in marmoset hippocampus during free-navigation that exhibit remarkable parallels to analogous neurons in other mammalian species. Although theta oscillations were prevalent in the marmoset hippocampus, the patterns of activity were notably different than in other taxa. This local field potential oscillation occurred in bouts – rather than continuously – and was neither significantly modulated by locomotion nor consistently coupled to place cell activity. These findings suggest that the relationship between place cell activity and theta oscillations in primate hippocampus during free navigation differs substantially from rodents and paint an intriguing comparative picture regarding the neural basis of spatial navigation across mammals.</p>
Interindividual differences influence multisensory processing during spatial navigation
<p>The dataset contains the raw data from two experiments. We investigate the ability of spatial navigation using auditory, visual or audiovisual landmarks in the environment.</p>
Inductive biases of neural network modularity in spatial navigation
<p>The brain may have evolved a modular architecture for reward-based learning in daily tasks, with circuits featuring functionally specialized modules that match the task structure. We propose that this architecture enables better learning and generalization than architectures with less specialized modules. To test this hypothesis, we trained reinforcement learning agents with various neural architectures on a naturalistic navigation task. We found that the architecture that largely segregates computations of state representation, value, and action into specialized modules enables more efficient learning and better generalization. The behavior of agents with this modular architecture also resembles macaque behaviors more closely. Investigating the latent state computations in these agents, we discovered that the learned state representation combines prediction and observation, weighted by their relative uncertainty, akin to a Kalman filter. These results shed light on the possible rationale for the brain's modular specializations and suggest that artificial systems can use this insight from neuroscience to improve learning and generalization in natural tasks.</p>
Enhancing Spatial Navigation Using Non-Invasive Brain Stimulation
ClinicalTrials.gov study NCT01958437. IPD Sharing: NO. Countries: 1. Publications: 2.
Spatial modulation of visual responses arises in cortex with active navigation
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Inductive biases of neural network modularity in spatial navigation
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Data from: Spatial encoding in primate hippocampus during free navigation
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Data for "What it Takes to Get There: Spatial Cognition and Autonomous Indoor Robot Navigation"
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Wide-angle simulated artificial vision enhances spatial navigation and object interaction in a naturalistic environment
<p>This folder contains the dataset and the processing code generated in the article 'Wide-angle simulated artificial vision enhances spatial navigation and object interaction in a naturalistic environment' by Hinrichs et al. </p> <p> </p>
New Challenges for Gender Equality in AI: Navigating the Ethical and Social Implications.- 1st SPATIAL podcast episode
<p>Gender bias can penetrate AI systems through multiple avenues, posing a significant challenge in ensuring fair and equitable outcomes. From historical biases ingrained in the data to biased data selection methods, these factors contribute to biased AI systems. Recognizing the implications of gender bias in AI is crucial, as it impacts various domains such as social media advertising, job recruitment, smart devices, facial recognition, and voice recognition. To strive for equity, it is essential to understand the interconnectedness of different social and political identities, emphasizing intersectionality and the need to avoid generalizing experiences.</p> <p>In the first episode of the <a href="https://spatial-h2020.eu/">SPATIAL </a>podcast, we had the privilege of conversing with Marcus Westberg, postdoctoral researcher and project manager at <a href="https://www.tudelft.nl/">TU Delft</a>, the coordinator of the SPATIAL project.</p>
Designing a Spatial Navigation Intervention Protocol Informed by Region-specific Brain Activation for Mild Cognitive Impairment
ClinicalTrials.gov study NCT07225400. IPD Sharing: YES. Countries: 1. Publications: 46.
Data from: Of molecules, memories, and migration: M1 acetylcholine receptors facilitate spatial memory formation and recall during migratory navigation
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DATA: A thalamic reticular circuit for head direction cell tuning and spatial navigation
<p>As we navigate in space, external landmarks and internal information guide our movement. Circuit and synaptic mechanisms that integrate these cues with head-direction (HD) signals remain, however, unclear. We identify an excitatory synaptic projection from the presubiculum (PreS) and the multisensory-associative retrosplenial cortex (RSC) to the anterodorsal thalamic reticular nucleus (TRN), so far classically implied in gating sensory information flow. <em>In vitro</em>, projections to TRN involve AMPA/NMDA-type glutamate receptors that initiate TRN cell burst discharge and feedforward inhibition of anterior thalamic nuclei. <em>In vivo</em>, chemogenetic anterodorsal TRN inhibition modulates PreS/RSC-induced anterior thalamic firing dynamics, broadens the tuning of thalamic HD cells, and lead to preferential use of allo- over egocentric search strategies in the Morris water maze. TRN-dependent thalamic inhibition is thus an integral part of limbic navigational circuits wherein it coordinates external sensory and internal HD signals to regulate the choice of search strategies during spatial navigation.</p>
Neural Correlates of Real World Spatial Navigation in Humans
ClinicalTrials.gov study NCT04874220. IPD Sharing: YES. Countries: 1. Publications: 0.
Combinated Cues and Virtual Spatial Navigation
ClinicalTrials.gov study NCT03534128. IPD Sharing: NO. Countries: 1. Publications: 0.
Spatial Navigation for the Early Detection of Alzheimer's Disease.
ClinicalTrials.gov study NCT06385951. IPD Sharing: Not stated. Countries: 1. Publications: 0.
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.