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Building on a Solid Baseline: Anticipatory Biases in Attention.
Anna C Nobre1, John T Serences2
1Department of Experimental Psychology Department, University of Oxford, Oxford, UK; Oxford Centre for Human Brain Activity, Department of Psychiatry, Wellcome Centre for Integrative Neuroimaging, University of Oxford, Oxford, UK.
Trends in Neurosciences
|March 4, 2018
Summary
Focusing attention alters brain activity in the human visual cortex before stimuli appear. This 1999 study pioneered research into cognitive-sensory interactions and proactive brain signals shaping perception.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Visual Perception
Background:
- The interaction between cognitive processes and sensory perception is a key area of research.
- Understanding how the brain proactively influences sensory processing is crucial for explaining perception.
Purpose of the Study:
- To investigate the impact of attention on baseline brain activity in the human visual cortex.
- To explore the role of endogenous signals in shaping perception prior to stimulus presentation.
Main Methods:
- Utilized brain-imaging techniques to measure neural activity.
- Compared brain activity during periods of focused spatial attention versus baseline conditions.
Main Results:
- Demonstrated that spatial attention significantly altered baseline activity levels in visual cortex regions.
- Showed these changes occurred even in the absence of external visual stimuli.
Conclusions:
- Attentional focus proactively modulates sensory processing in the human visual cortex.
- This foundational study established a framework for exploring cognitive-sensory interactions and endogenous neural signals.
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