Effects of Computerized Biofeedback-based Balance Intervention on the Muscle Coactivation Patterns during Dynamic...

Area of Science:

• Neuroscience
• Rehabilitation Medicine
• Biomechanics

Background:

• Balance dysfunction is a significant consequence of Traumatic Brain Injury (TBI), increasing fall risk.
• The underlying neuromuscular mechanisms of balance dysfunction in TBI are not well understood.
• Existing research lacks sufficient investigation into targeted interventions for improving neuromuscular control in TBI.

Purpose of the Study:

• To investigate the effects of a Computerized Biofeedback-based Balance Intervention (CBBI) on muscle coactivation patterns in individuals with TBI.
• To assess changes in neuromuscular responses to balance perturbations following the CBBI.
• To explore the relationship between changes in muscle coactivation and functional balance improvements.

Main Methods:

• Thirteen TBI participants were randomized into an intervention (TBI-INT) and control (TBI-CTL) group.
• A computerized posturography platform (Neurocom Balance Master) recorded postural responses to perturbations.
• Multimodal data including electroencephalography (EEG), electromyography (EMG) of lower-limb muscles (tibialis anterior and gastrocnemius), and center of pressure (COP) were collected.
• The Co-Contraction Index (CCI) was computed to quantify muscle coactivation.
• Clinical outcome measures included the Berg Balance Scale (BBS), 10 Meter Walk Test (10MWT), and Timed Up-and-Go (TUG) tests.

Main Results:

• A significant decrease in the Co-Contraction Index (CCI) was observed in the TBI-INT group (p<0.01) from baseline to follow-up, but not in the TBI-CTL group.
• Changes in CCI correlated significantly with improvements in the Berg Balance Scale (BBS) scores.
• These findings indicate that the CBBI may enhance postural stability by modulating muscle coactivation patterns.

Conclusions:

• Computerized Biofeedback-based Balance Intervention (CBBI) shows potential in improving postural stability in individuals with TBI.
• The study highlights the utility of the muscle Co-Contraction Index (CCI) as a metric to evaluate neuromuscular responses in balance-impaired individuals.
• Further research is warranted to elucidate the long-term effects and clinical applicability of CBBI in TBI rehabilitation.