Sex differences in human EEG theta oscillations during spatial navigation in virtual reality

Area of Science:

• Neuroscience
• Cognitive Psychology
• Human Electrophysiology

Background:

• Theta oscillations (4-8 Hz EEG activity) are implicated in sensorimotor integration and spatial navigation.
• Understanding sex differences in neural mechanisms underlying spatial navigation is crucial for cognitive neuroscience.

Purpose of the Study:

• To investigate sex differences in theta oscillations during spatial navigation in virtual environments.
• To explore the relationship between theta activity, sensorimotor integration, and navigation performance in males and females.

Main Methods:

• Electroencephalography (EEG) was used to record brain activity in 27 young adults (13 males, 14 females) during a virtual maze navigation task.
• Analysis focused on absolute theta band power and event-related desynchronization/synchronization (ERD/ERS) in response to spatial cues and landmarks.

Main Results:

• Processing spatial cues and landmarks significantly increased cortical theta activity compared to baseline, supporting the sensorimotor integration hypothesis.
• No significant sex differences were observed in overall spatial navigation performance.
• Females showed a greater increase in theta oscillations when processing landmarks than males.
• Higher theta power correlated with improved navigation in women, but with decreased performance in men.

Conclusions:

• Theta oscillations play a role in sensorimotor integration during spatial navigation, potentially differing between sexes.
• Females may exhibit stronger sensorimotor integration during landmark-based navigation compared to males.
• The divergent relationship between theta power and navigation performance in males and females warrants further investigation into sex-specific neural strategies.