Normalization governs attentional modulation within human visual cortex
| Autor: | Ilona M. Bloem, Sam Ling |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Normalization (statistics) Adult Male Visual perception Science Models Neurological General Physics and Astronomy Striate cortex Neural population General Biochemistry Genetics and Molecular Biology Article 03 medical and health sciences 0302 clinical medicine Attentional modulation medicine Humans Attention lcsh:Science Visual Cortex Multidisciplinary Extramural fungi General Chemistry Magnetic Resonance Imaging 030104 developmental biology Visual cortex medicine.anatomical_structure lcsh:Q Female Psychology Neuroscience 030217 neurology & neurosurgery |
| Zdroj: | Nature Communications Nature Communications, Vol 10, Iss 1, Pp 1-10 (2019) |
| ISSN: | 2041-1723 |
| Popis: | Although attention is known to increase the gain of visuocortical responses, its underlying neural computations remain unclear. Here, we use fMRI to test the hypothesis that a neural population’s ability to be modulated by attention is dependent on divisive normalization. To do so, we leverage the feature-tuned properties of normalization and find that visuocortical responses to stimuli sharing features normalize each other more strongly. Comparing these normalization measures to measures of attentional modulation, we demonstrate that subpopulations which exhibit stronger normalization also exhibit larger attentional benefits. In a converging experiment, we reveal that attentional benefits are greatest when a subpopulation is forced into a state of stronger normalization. Taken together, these results suggest that the degree to which a subpopulation exhibits normalization plays a role in dictating its potential for attentional benefits. Attention is known to enhance relevant information in our environment, yet its underlying neural computations remain unclear. Here, the authors provide evidence that the degree to which a neural population can normalize itself results in greater potential for attentional benefits. |
| Databáze: | OpenAIRE |
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