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Non-invasive real-time access to spatial attention information from 3T fMRI BOLD signals
- Publication Year :
- 2022
- Publisher :
- HAL CCSD, 2022.
-
Abstract
- Access to higher cognitive functions in real-time remains very challenging, because these functions are internally driven and their assessment is based onto indirect measures. In addition, recent finding show that these functions are highly dynamic. Previous studies using intra-cortical recordings in monkeys, succeed to access the (x,y) position of covert spatial attention, in real-time, using classification methods applied to monkey prefrontal multi-unit activity and local field potentials. In contrast, the direct access to attention with non-invasive methods is limited to predicting the attention localisation based on a quadrant classification. Here, we demonstrate the feasibility to track covert spatial attention localization using non-invasive fMRI BOLD signals, with an unprecedented spatial resolution. We further show that the errors produced by the decoder are not randomly distributed but concentrate on the locations neighbouring the cued location and that behavioral errors correlate with weaker decoding performance. Last, we also show that the voxels contributing to the decoder precisely match the visual retinotopic organization of the occipital cortex and that single trial access to attention is limited by the intrinsic dynamics of spatial attention. Taken together, these results open the way to the development of remediation and enhancement neurofeedback protocols targeting the attentional function.
- Subjects :
- Cued speech
Computer science
business.industry
media_common.quotation_subject
[SCCO.NEUR]Cognitive science/Neuroscience
Cognition
Pattern recognition
Local field potential
computer.software_genre
Covert
Voxel
Contrast (vision)
Artificial intelligence
Neurofeedback
business
computer
Decoding methods
media_common
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....fc95218715fc886b961896bf4a52ef95