Utility of electromyographic biological feedback in chronic stuttering: a clinical study with follow-up

A systematic case study is presented in which eight chronic adult stutterers underwent an electromyographic (EMG) biological feedback training program designed to reduce masseter muscle tension in an effort to improve fluency. All subjects mastered the program within 10 30-min. sessions. Measures of muscle tension and fluency indicated improvement at the end of treatment that were maintained at 3- to 6-mo. follow-up.