Over the last several decades, spatial attention has been shown to influence the activity of neurons in visual cortex in various ways. These conflicting observations have inspired competing models to account for the influence of attention on perception and behavior. Here, we used electroencephalography (EEG) to assess steady-state visual evoked potentials (SSVEP) in human subjects and showed that highly focused spatial attention primarily enhanced neural responses to high-contrast stimuli (response gain), whereas distributed attention primarily enhanced responses to medium-contrast stimuli (contrast gain). Together, these data suggest that different patterns of neural modulation do not reflect fundamentally different neural mechanisms, but instead reflect changes in the spatial extent of attention.
Changing the Spatial Scope of Attention Alters Patterns of Neural Gain in Human Cortex
Sirawaj Itthipuripat,Javier O. Garcia,Nuttida Rungratsameetaweemana,Thomas C. Sprague,J. Serences
Published 2014 in Journal of Neuroscience
ABSTRACT
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- Publication year
2014
- Venue
Journal of Neuroscience
- Publication date
2014-01-01
- Fields of study
Biology, Medicine, Psychology
- Identifiers
- External record
- Source metadata
Semantic Scholar, PubMed
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