State dependency of inhibitory control performance: an electrical neuroimaging study

Area of Science:

• Neuroscience
• Cognitive Psychology
• Brain Activity

Background:

• Pre-stimulus brain activity impacts low-level perception.
• The influence on high-order executive functions, like inhibition, is less understood.

Purpose of the Study:

• To investigate how pre-stimulus brain activity fluctuations affect inhibitory control.
• To determine if cognitive states influence executive processes.

Main Methods:

• Used a Go/NoGo task with 17 participants and 64-channel electroencephalogram (EEG).
• Analyzed event-related potentials preceding NoGo stimuli for correct rejections vs. false alarms.
• Employed global field power analysis and source localization.

Main Results:

• Higher pre-stimulus brain activity (Global Field Power) observed before false alarms (inhibition failures) compared to correct rejections.
• No significant differences in the topography of brain activity were found.
• Source estimation indicated greater activity in bilateral inferior frontal gyri and right inferior parietal lobule before false alarms.

Conclusions:

• Pre-stimulus brain activity variations in attentional and control networks influence inhibitory control performance.
• Demonstrates the state dependency of high-order executive cognitive processes.