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Updated: May 19, 2026
09:37
Measurement of Neurophysiological Signals of Ignoring and Attending Processes in Attention Control
Published on: July 5, 2015
Top-down attention switches coupling between low-level and high-level areas of human visual cortex
Naseem Al-Aidroos1, Christopher P Said, Nicholas B Turk-Browne
1Department of Psychology, Princeton University, Princeton, NJ 08540, USA. naseem@uoguelph.ca
Summary
Top-down attention prioritizes goal-relevant information by altering neural activity and background connectivity in the visual system. This dynamic synchronization of brain areas enhances attentional focus and behavioral success.
Area of Science:
- Cognitive Neuroscience
- Visual Perception
- Neuroscience
Background:
- Top-down attention is crucial for processing complex environments by prioritizing goal-relevant information.
- Previous research indicated attention modulates stimulus-evoked neural activity in visual areas.
- The precise mechanisms by which attention influences neural processing remain under investigation.
Purpose of the Study:
- To investigate the influence of top-down attention on background neural coupling within the visual system.
- To determine if attentional modulation of background connectivity is independent of evoked activity.
- To assess the predictive power of background connectivity changes on attentional performance.
Main Methods:
- Utilized functional neuroimaging techniques to measure neural activity and connectivity in the human visual cortex.
- Manipulated attentional goals to observe corresponding changes in neural activity patterns.
- Analyzed noise correlations and stimulus-evoked activity to differentiate attentional effects.
- Correlated neural findings with behavioral measures of attentional success.
Main Results:
- Top-down attention significantly alters background coupling between visual areas, independent of evoked activity.
- Different attentional goals induced distinct patterns of noise correlations, linking low-level and goal-relevant high-level areas.
- These connectivity changes persisted even without visual stimulation.
- Modulation of background connectivity predicted behavioral success in attention tasks more effectively than evoked activity modulation.
Conclusions:
- Top-down attention influences both stimulus-evoked activity and background neural coupling in the visual system.
- Background connectivity changes represent a distinct mechanism by which attention prioritizes goal-relevant information.
- Attention dynamically synchronizes visual processing hierarchy levels, forming state-dependent functional pathways.
- These findings offer new insights into the neural basis of attentional control and information prioritization.
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