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Learning of goal-relevant and -irrelevant complex visual sequences in human V1
Clive R Rosenthal1, Indira Mallik2, Cesar Caballero-Gaudes3
1Nuffield Department of Clinical Neurosciences, University of Oxford, UK.
Neuroimage
|June 16, 2018
Summary
Human primary visual cortex (V1) can learn multiple complex visual sequences simultaneously, even those in peripheral vision. This finding expands our understanding of V1
Area of Science:
- Neuroscience
- Cognitive Neuroscience
- Visual Perception
Background:
- Learning and memory involve medial temporal lobe and neocortical networks.
- Primary visual cortex (V1) role in recognition memory is emerging but not fully understood.
- Previous studies tested V1 with only single visuospatial sequences.
Purpose of the Study:
- To investigate if human V1 supports learning of multiple, concurrent complex visual sequences.
- To examine V1's role in learning sequences with discontinuous (second-order) associations.
- To assess V1's involvement with both central and peripheral visual stimuli.
Main Methods:
- Functional magnetic resonance imaging (fMRI) was employed.
- Participants viewed three concurrent visual sequences (one central, two peripheral).
- Online measures of sequence-specific knowledge were obtained using pseudorandom sequences.
Main Results:
- A network including precuneus and V1 was involved in learning the central sequence.
- Right V1 showed modulation related to a concurrent peripheral sequence in the left visual field.
- Left V1 did not show similar modulation for peripheral sequences.
Conclusions:
- Human V1 can support learning of multiple concurrent visual sequences with complex associations.
- V1's role extends to learning goal-irrelevant peripheral sequences.
- This study provides novel evidence for V1's contribution to complex visual learning.
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