FREQ-NESS Reveals Age-Related Differences in Frequency-Resolved Brain Networks During Auditory Recognition and...

Area of Science:

• Cognitive Neuroscience
• Neuroimaging
• Aging Research

Background:

• Understanding age-related changes in brain network dynamics during cognitive tasks is crucial.
• Previous research primarily focused on resting-state activity and passive listening.

Purpose of the Study:

• To adapt and apply the FREQ-NESS pipeline to event-related task and resting-state magnetoencephalography (MEG) data.
• To investigate frequency-specific brain network dynamics and their age-related alterations during active memory engagement.

Main Methods:

• Utilized source-reconstructed MEG data from 140 healthy participants.
• Adapted the FREQ-NESS pipeline to quantify network variance, spatial organization, and time-resolved power.
• Performed time-frequency analysis to examine age- and condition-dependent changes in neural oscillations.

Main Results:

• Significant age and condition effects were observed in network variance at 8.6, 10.0, and 20.0 Hz.
• Older adults showed persistent frequency peaks (8.6, 10.0 Hz) during rest and task, unlike younger adults who displayed task-related reductions.
• Time-frequency analysis revealed age- and condition-dependent desynchronization in alpha and beta bands (7.1-22.9 Hz).

Conclusions:

• The adapted FREQ-NESS pipeline is effective for analyzing event-related MEG data.
• Frequency-resolved network analysis is vital for understanding age-related changes in active auditory memory processing.
• Age influences the organization and dynamics of brain networks during memory tasks.