Utilizing EMG Biofeedback To Modify Cortical Contributions To Postural Control

ASU Author/Contributor (non-ASU co-authors, if there are any, appear on document)
Rachel Alexandra Sledge (Creator)
Appalachian State University (ASU )
Web Site: https://library.appstate.edu/
Alan Needle

Abstract: Electromyography Biofeedback (EMG-BF) is a clinical tool used to enhance patient awareness of muscular functions in real time. When used with rehabilitation exercises, it is believed that EMG-BF can enhance neural plasticity in postural control muscles. We measured peripheral and cortical excitability before and after a balance intervention with or without EMG-BF intervention. Nineteen healthy men and women between the ages of 19-24 participated in this study. The Hoffmann reflex (H-Reflex) and motor evoked potentials (MEP) were elicited for three postural control muscles: tibialis anterior (TA), peroneus longus (PL) and soleus (SOL) with electrical and transcranial magnetic stimulation before and after two sessions of 30-minutes of balance training using the Biodex Balance System. Reflexive excitability and MEP size was compared across muscles, intensity, time, and groups. Results indicated that EMG-BF eliminated differences in reflexive excitability between PL and SOL, potentially causing the PL to behave as a postural muscle. Cortical excitability to the SOL decreased in the group that received EMG-BF, but not for the TA and PL. These findings potentially indicate that balance training with EMG-BF has the effect of inhibiting the SOL, which could be clinically useful for treatment of lower extremity dystonia.

Additional Information

Honors Project
Sledge, R. (2017). "Utilizing EMG Biofeedback To Modify Cortical Contributions To Postural Control." Unpublished Honors Thesis. Appalachian State University, Boone, NC.
Language: English
Date: 2017
Transcranial Magnetic Stimulation, Hoffman Reflex Balance training, Biodex Balance System, dystonia

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