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Updated: May 6, 2026
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Measurement of Neurophysiological Signals of Ignoring and Attending Processes in Attention Control
Published on: July 5, 2015
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Frequency-specific mechanism links human brain networks for spatial attention
Amy L Daitch1, Mohit Sharma, Jarod L Roland
1Department of Biomedical Engineering, Department of Neurological Surgery, Department of Neurology, Department of Radiology, and Department of Anatomy and Neurobiology, Washington University in St. Louis, St. Louis, MO 63110.
Summary
Selective attention uses brain networks to filter information. Researchers found these networks use low-frequency brainwave modulation (delta and theta) to select relevant information, potentially altering neural excitability.
Area of Science:
- Neuroscience
- Cognitive Neuroscience
- Systems Neuroscience
Background:
- Selective attention enables goal-directed information processing by filtering environmental stimuli.
- Functional brain imaging reveals distributed attention networks, but their dynamic mechanisms remain unclear.
Purpose of the Study:
- To investigate the dynamic mechanisms underlying selective attention network function.
- To explore how dorsal and ventral attention networks operate during cognitive tasks.
Main Methods:
- Utilized functional magnetic resonance imaging (fMRI) to map attention networks in epileptic patients.
- Employed subdural electrocorticography (ECoG) to record cortical physiology during a spatial attention task.
Main Results:
- Attention networks exhibited selective phase-modulation at low frequencies (delta and theta) during task performance.
- Different attention processes, such as holding and shifting attention, correlated with distinct frequency synchrony patterns.
Conclusions:
- Low-frequency phase modulation is a key mechanism for attention network dynamics, potentially influencing neural excitability and connectivity.
- Frequency-specific synchrony may segregate distinct attentional processes, optimizing neural resource allocation.
