Enhancing Inhibitory Control in Older Adults: A Biofeedback Study

Area of Science:

• Neuroscience
• Gerontology
• Cognitive Psychology

Background:

• Multidomain interventions using biofeedback and neurofeedback enhance executive functions.
• Healthy aging is associated with changes in executive functions, including inhibitory control.
• Heart Rate Variability Biofeedback (HRV-BF) and Near Infrared Hemoencephalography Neurofeedback (nirHEG-NF) are emerging techniques for cognitive enhancement.

Purpose of the Study:

• To investigate the efficacy and feasibility of a combined HRV-BF and nirHEG-NF intervention on inhibitory control in healthy older adults.
• To examine the effects of the intervention on autonomic regulation and prefrontal blood oxygenation.
• To compare outcomes between a biofeedback group and an active control group.

Main Methods:

• Thirty-four healthy older adults were randomized into a 10-week combined HRV-BF and nirHEG-NF intervention group or an active control group.
• Cognitive outcomes, autonomic regulation (HRV), and prefrontal blood oxygenation were assessed before and after the intervention.
• Training involved real-time biofeedback for the intervention group and a similar protocol without feedback for the control group.

Main Results:

• The biofeedback group showed improvements in one type of inhibitory control (interference tasks) but not response inhibition.
• Participants with lower baseline Heart Rate Variability (HRV) exhibited increased HRV post-intervention.
• Older adults increased prefrontal blood oxygenation during training, but no significant overall pre- to post-intervention changes were observed.

Conclusions:

• Combined HRV-BF and nirHEG-NF intervention shows potential for improving specific components of inhibitory control in older adults.
• The intervention may benefit parasympathetic activity in individuals with low baseline HRV.
• The training enhanced prefrontal blood oxygenation during the intervention sessions, suggesting localized physiological effects.