Directed Communication in Theta and Alpha Networks Supports Content Handling in Working Memory

Area of Science:

• Cognitive Neuroscience
• Neuroimaging
• Electrophysiology

Background:

• Executive functions, including working memory, are crucial for flexible behavior.
• Mental rotation tasks probe the dynamic coordination of perception, memory, and action.
• Understanding neural communication during working memory operations is essential.

Purpose of the Study:

• To investigate the role of directed communication in theta and alpha brainwave activity during mental rotation.
• To identify specific brain regions involved in information transfer during this cognitive task.
• To elucidate the functional significance of theta and alpha band dynamics in working memory.

Main Methods:

• Electroencephalography (EEG) with beamforming source localization was employed.
• Analysis focused on theta (4-8 Hz) and alpha (8-12 Hz) band power and directed information transfer.
• Behavioral performance in mental rotation tasks was correlated with neural activity.

Main Results:

• High-demand mental rotation showed decreased theta and increased alpha power.
• Directed information transfer was observed from anterior (temporal, frontal, insular) to posterior (temporo-parietal, occipito-temporal) regions.
• Theta band activity was linked to working memory updating and response selection, while alpha band activity supported representation stabilization.

Conclusions:

• Mental rotation involves frequency-specific, hierarchical communication between control and representational brain systems.
• Directed theta and alpha dynamics facilitate the flexible transformation of internal representations in working memory.
• These findings offer insights into the neural mechanisms underlying executive functions and working memory.