Relationship between frontalis muscle tension and digital skin temperature during EMG biofeedback

The current study examined the relationship between frontalis EMG and digital skin temperature during EMG biofeedback. 63 subjects participated in 8 40-min. sessions involving a 10-min. adaptation, baseline, feedback, and postfeedback period. The results showed significant reductions in EMG and increases in skin temperature between feedback and baseline periods. Multiple regression analysis showed that baseline EMG levels were the best predictors of skin temperature changes and characterized the relationship between the variables by an over-all negative correlation of .32.