Cortical neurodynamics of inhibitory control

Area of Science:

• Neuroscience
• Cognitive Neuroscience
• Brain Imaging

Background:

• Inhibitory control is crucial for goal-directed behavior.
• Understanding the neural mechanisms of inhibitory control is an active area of research.
• The antisaccade task is a common paradigm for studying inhibitory control.

Purpose of the Study:

• To investigate the neural basis of inhibitory control using magnetoencephalography (MEG).
• To examine the role of neural oscillations in the prefrontal cortex (PFC) and frontal eye field (FEF) during saccade inhibition.

Main Methods:

• Magnetoencephalography (MEG) was used to record brain activity in human participants.
• Participants performed the antisaccade task, requiring them to suppress a prepotent saccade and look in the opposite direction.
• Neural oscillations in the beta-band (18-38 Hz) and alpha-band (10-18 Hz) were analyzed in the PFC and FEF.

Main Results:

• Increased beta-band power in the lateral PFC and alpha-band power in the FEF preceded successful saccade inhibition.
• Prestimulus FEF alpha-band power predicted the success of saccadic inhibition on a trial-by-trial basis.
• Inhibitory control enhanced cross-frequency coupling between PFC beta-band and FEF alpha-band activity, initiated by the PFC.

Conclusions:

• Top-down inhibitory control involves a generalized neural mechanism.
• Prefrontal beta-band activity plays a key role in initiating alpha-band activity for inhibition.
• This mechanism likely facilitates the functional inhibition of motor and/or sensory systems.