Modulating brain oscillations to drive brain function.

Area of Science:

• Neuroscience
• Cognitive Neuroscience
• Computational Neuroscience

Background:

• Neuronal oscillations are rhythmic electrical activity in the brain.
• Their precise causal role in brain function, particularly in perception, remains debated.
• Understanding this role is key to deciphering neuronal computation.

Purpose of the Study:

• To investigate the causal role of neuronal oscillations in visual perception.
• To determine if manipulating brain oscillations can alter perceptual outcomes.
• To explore the functional implications of synchronized oscillatory activity.

Main Methods:

• Utilized transcranial electrical current stimulation (TES) to modulate brain activity.
• Applied oscillatory currents to synchronize neuronal oscillations in both cerebral hemispheres.
• Assessed the impact of induced synchrony on the perception of an ambiguous visual stimulus.

Main Results:

• Successfully manipulated visual perception by forcing synchrony between left and right visual hemisphere oscillations.
• Human observers showed a bias towards one perceptual interpretation of the ambiguous stimulus under synchronized conditions.
• Demonstrated that neuronal oscillations causally influence visual experience.

Conclusions:

• Neuronal oscillations play a causal role in driving visual experience, rather than being a byproduct of it.
• Synchronized oscillatory activity is crucial for integrating information across brain areas and forming functional networks.
• These findings open avenues for experimental and clinical interventions targeting brain oscillations and associated functions.