Human EEG Correlates of Spatial Navigation within Egocentric and Allocentric Reference Frames

2010 ◽  
pp. 191-206 ◽  
Author(s):  
Markus Plank ◽  
Hermann J. Müller ◽  
Julie Onton ◽  
Scott Makeig ◽  
Klaus Gramann
Keyword(s):  
Reference Frames ◽  
Spatial Navigation ◽  
Human Eeg

scholarly journals Egocentric and Allocentric Spatial Memory in Mild Cognitive Impairment with Real-World and Virtual Navigation Tasks: A Systematic Review

2021 ◽  
Vol 79 (1) ◽  
pp. 95-116
Author(s):  
Cosimo Tuena ◽  
Valentina Mancuso ◽  
Chiara Stramba-Badiale ◽  
Elisa Pedroli ◽  
Marco Stramba-Badiale ◽  
...  
Keyword(s):  
Systematic Review ◽  
Cognitive Impairment ◽  
Mild Cognitive Impairment ◽  
Spatial Memory ◽  
Real World ◽  
Reference Frames ◽  
Spatial Navigation ◽  
Experimental Studies ◽  
Motion Cues ◽  
Self Motion

Background: Spatial navigation is the ability to estimate one’s position on the basis of environmental and self-motion cues. Spatial memory is the cognitive substrate underlying navigation and relies on two different reference frames: egocentric and allocentric. These spatial frames are prone to decline with aging and impairment is even more pronounced in Alzheimer’s disease (AD) or in mild cognitive impairment (MCI). Objective: To conduct a systematic review of experimental studies investigating which MCI population and tasks are used to evaluate spatial memory and how allocentric and egocentric deficits are impaired in MCI after navigation. Methods: PRISMA and PICO guidelines were applied to carry out the systematic search. Down and Black checklist was used to assess methodological quality. Results: Our results showed that amnestic MCI and AD pathology are the most investigated typologies; both egocentric and allocentric memory are impaired in MCI individuals, and MCI due to AD biomarkers has specific encoding and retrieval impairments; secondly, spatial navigation is principally investigated with the hidden goal task (virtual and real-world version), and among studies involving virtual reality, the privileged setting consists of non-immersive technology; thirdly, despite subtle differences, real-world and virtual versions showed good overlap for the assessment of MCI spatial memory. Conclusion: Considering that MCI is a subclinical entity with potential risk for conversion to dementia, investigating spatial memory deficits with navigation tasks might be crucial to make accurate diagnosis and rehabilitation.

scholarly journals The Use of Egocentric and Allocentric Reference Frames in Static and Dynamic Conditions in Humans

2020 ◽  
pp. 787-801
Author(s):  
S MORARESKU ◽  
K VLCEK
Keyword(s):  
Reference Frame ◽  
Reference Frames ◽  
Spatial Navigation ◽  
Three Dimensional ◽  
Neural Correlates ◽  
Two Dimensional ◽  
Spatial Coding ◽  
Dynamic Conditions ◽  
Spatial Reference Frames ◽  
Static Conditions

The dissociation between egocentric and allocentric reference frames is well established. Spatial coding relative to oneself has been associated with a brain network distinct from spatial coding using a cognitive map independently of the actual position. These differences were, however, revealed by a variety of tasks from both static conditions, using a series of images, and dynamic conditions, using movements through space. We aimed to clarify how these paradigms correspond to each other concerning the neural correlates of the use of egocentric and allocentric reference frames. We review here studies of allocentric and egocentric judgments used in static two- and three-dimensional tasks and compare their results with the findings from spatial navigation studies. We argue that neural correlates of allocentric coding in static conditions but using complex three-dimensional scenes and involving spatial memory of participants resemble those in spatial navigation studies, while allocentric representations in two-dimensional tasks are connected with other perceptual and attentional processes. In contrast, the brain networks associated with the egocentric reference frame in static two-dimensional and three-dimensional tasks and spatial navigation tasks are, with some limitations, more similar. Our review demonstrates the heterogeneity of experimental designs focused on spatial reference frames. At the same time, it indicates similarities in brain activation during reference frame use despite this heterogeneity.

scholarly journals Egocentric Asymmetric Coding in Sensory Cortical Border Cells

2021 ◽  
Author(s):  
Xiaoyang Long ◽  
Bin Deng ◽  
Jing Cai ◽  
Zhe Sage Chen ◽  
Sheng-Jia Zhang
Keyword(s):  
Reference Frames ◽  
Hippocampal Formation ◽  
Spatial Navigation ◽  
List Type ◽  
Border Cells ◽  
Spatial Coding ◽  
Egocentric Reference Frame ◽  
Border Cell ◽  
Sensory Cortices ◽  
Representations Of Space

ABSTRACTBoth egocentric and allocentric representations of space are essential to spatial navigation. Although some studies of egocentric coding have been conducted within and around the hippocampal formation, externally anchored egocentric spatial representations have not yet been fully explored. Here we record and identify two subtypes of border cell in the rat primary somatosensory cortex (S1) and secondary visual cortex (V2). Subpopulations of S1 and V2 border cells exhibit rotation-selective asymmetric firing fields in an either clockwise (CW) or counterclockwise (CCW) manner. CW- and CCW-border cells increase their firing rates when animals move unidirectionally along environmental border(s). We demonstrate that both CW- and CCW-border cells fire in an egocentric reference frame relative to environmental borders, maintain preferred directional tunings in rotated, stretched, dark as well as novel arenas, and switch their directional firings in the presence of multi-layer concentric enclosures. These findings may provide rotation-selective egocentric reference frames within a larger spatial navigation system, and point to a common computational principle of spatial coding shared by multiple sensory cortical areas.HighlightsEgocentric border cells are present in rat S1 and V2Subtypes of border cells display egocentric asymmetric codingEgocentric and allocentric streams coexist in sensory corticesRotation-selective asymmetric firing is robust with environmental manipulations

scholarly journals Extrinsic reference frames modify the neural encoding of object locations during active spatial navigation

2011 ◽  
Vol 11 (11) ◽  
pp. 862-862
Author(s):  
E. Chan ◽  
O. Baumann ◽  
M. Bellgrove ◽  
J. B. Mattingley
Keyword(s):  
Reference Frames ◽  
Spatial Navigation ◽  
Neural Encoding ◽  
Object Locations

scholarly journals Human spatial navigation: Neural representations of spatial scales and reference frames obtained from an ALE meta-analysis

NeuroImage ◽  
2021 ◽  
pp. 118264
Author(s):  
Jinhui Li ◽  
Ruibin Zhang ◽  
Siqi Liu ◽  
Qunjun Liang ◽  
Senning Zheng ◽  
...  
Keyword(s):  
Reference Frames ◽  
Spatial Scales ◽  
Spatial Navigation ◽  
Meta Analysis ◽  
Neural Representations

scholarly journals Reference frames in virtual spatial navigation are viewpoint dependent

2014 ◽  
Vol 8 ◽  
Author(s):  
Ágoston Török ◽  
T. Peter Nguyen ◽  
Orsolya Kolozsvári ◽  
Robert J. Buchanan ◽  
Zoltan Nadasdy
Keyword(s):  
Reference Frames ◽  
Spatial Navigation

Multisensory processing during spatial navigation

2011 ◽  
Author(s):  
I. Van Der Ham ◽  
M. Van Der Kuil ◽  
F. Delogu
Keyword(s):  
Multisensory Processing ◽  
Spatial Navigation
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