Cardiorespiratory fitness modulates prestimulus EEG microstates during a sustained attention task

Area of Science:

• Neuroscience
• Cognitive Science
• Exercise Physiology

Background:

• Cardiorespiratory fitness enhances sustained attention and signal detection.
• Previous research focused on post-stimulus brain activity.
• Prestimulus electrocortical dynamics related to fitness and attention remain understudied.

Purpose of the Study:

• Investigate prestimulus electroencephalography (EEG) microstates.
• Examine their relationship with cardiorespiratory fitness during a psychomotor vigilance task.
• Understand the neural basis of attention differences based on fitness levels.

Main Methods:

• Recorded EEG microstates 2 seconds before stimulus onset.
• Analyzed data from 65 healthy adults (18-37 years) with varying cardiorespiratory fitness.
• Correlated microstate characteristics with fitness levels and psychomotor vigilance task performance.

Main Results:

• Lower duration of microstate A and higher occurrence of microstate D correlated with higher cardiorespiratory fitness.
• Increased global field power and microstate A occurrence linked to slower responses.
• Greater microstate D explained variance, coverage, and occurrence associated with faster responses.

Conclusions:

• Individuals with higher cardiorespiratory fitness exhibit distinct prestimulus EEG microstate patterns.
• These patterns suggest more efficient attentional resource allocation.
• Findings highlight the neural mechanisms underlying fitness-related attention benefits.