EEG and MEG: relevance to neuroscience

Area of Science:

• Neuroscience
• Cognitive Science
• Neuroimaging

Background:

• Dynamic cognitive processes require high temporal resolution, making electroencephalography (EEG) and magnetoencephalography (MEG) invaluable tools.
• EEG/MEG signals are essential for measuring functional and effective brain connectivity.
• Understanding neuronal mechanisms underlying cognition relies on analyzing brain signals.

Purpose of the Study:

• To survey the relevance of EEG/MEG signals for gaining novel insights into cognitive processes.
• To emphasize the role of neuronal oscillations and their combinations in brain function.
• To explore the functional roles of brain oscillations in information coding, attention, and neuronal communication.

Main Methods:

• Description of the foundations and basic methodological aspects of EEG/MEG signals.
• Survey of EEG/MEG signal relevance for cognitive process research.
• Emphasis on the analysis of neuronal oscillations (ultra-slow, theta, alpha, beta, gamma, and high-frequency oscillations [HFOs]) and their combinations.

Main Results:

• EEG/MEG signals provide crucial measures of brain connectivity.
• Neuronal oscillations play significant roles in cognitive functions.
• Three primary functional roles of brain oscillations identified: information coding, attentional state modulation, and neuronal communication.

Conclusions:

• EEG/MEG are vital for understanding dynamic cognitive processes due to their high temporal resolution.
• Neuronal oscillations are fundamental to cognitive functions, enabling information processing and communication between neuronal populations.
• The creation of dynamic workspaces through neuronal communication is central to cognitive functions.