Cortical Hemodynamic Response Associated with Spatial Coding: A Near-Infrared Spectroscopy Study

Allocentric and egocentric are two types of spatial coding. Previous studies reported the dorsal attention network’s involvement in both types. To eliminate possible paradigm-specific confounds in the results, this study employed fine-grained cue-to-target paradigm to dissociate allocentric (aSC) an...

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Bibliographic Details
Published in:Brain topography Vol. 34; no. 2; pp. 207 - 220
Main Authors: Derbie, Abiot Y., Chau, Bolton, Lam, Bess, Fang, Yun-hua, Ting, Kin-Hung, Wong, Clive Y. H., Tao, Jing, Chen, Li-dian, Chan, Chetwyn C. H.
Format: Journal Article
Language:English
Published: New York Springer US 01.03.2021
Springer Nature B.V
Subjects:
Biomedical and Life Sciences
Biomedicine
Brain Mapping
Frontal gyrus
Hemoglobin
Humans
I.R. radiation
Infrared spectroscopy
Intraparietal sulcus
Magnetic Resonance Imaging
Neurology
Neurosciences
Neurovascular Coupling
Original Paper
Parietal Lobe
Psychiatry
Reaction time task
Space Perception
Spectroscopy, Near-Infrared
Spectrum analysis
Top-down attention
Allocentric spatial coding
IPL
Frames of reference
SFG
Attention
Fnirs
Egocentric spatial coding
ISSN:0896-0267, 1573-6792, 1573-6792
Online Access:Get full text
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Summary:Allocentric and egocentric are two types of spatial coding. Previous studies reported the dorsal attention network’s involvement in both types. To eliminate possible paradigm-specific confounds in the results, this study employed fine-grained cue-to-target paradigm to dissociate allocentric (aSC) and egocentric (eSC) spatial coding. Twenty-two participants completed a custom visuospatial task, and changes in the concentration of oxygenated hemoglobin (O 2 -Hb) were recorded using functional near-infrared spectroscopy (fNIRS). The least absolute shrinkage and selection operator-regularized principal component (LASSO-RPC) algorithm was used to identify cortical sites that predicted the aSC and eSC conditions’ reaction times. Significant changes in O 2 -Hb concentration in the right inferior parietal lobule (IPL) and post-central gyrus regions were common in both aSC and eSC. Results of inter-channel correlations further substantiate cortical activities in both conditions were predominantly over the right parieto-frontal areas. Together with right superior frontal gyrus areas be the reaction time neural correlates, the results suggest top-down attention and response-mapping processes are common to both spatial coding types. Changes unique to aSC were in clusters over the right intraparietal sulcus, right temporo-parietal junction, and left IPL. With the left pre-central gyrus region, be the reaction time neural correlate, aSC is likely to involve more orienting attention, updating of spatial information, and object-based response selection and inhibition than eSC. Future studies will use other visuospatial task designs for testing the robustness of the findings on spatial coding processes.
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ISSN:0896-0267
1573-6792
1573-6792
DOI:10.1007/s10548-021-00821-9