[The mechanism of action of biofeedback electromyography in muscle tension headache]. / Sul meccanismo d'azione dell'elettromiografia biofeedback nella cefalea muscolo-tensiva.

Headache of muscle tension origin and/or with a muscle tension component is underlain by a high degree of head, neck, and face muscle contraction. Biofeedback EMG enables patients to check their muscle tension, and thus achieve complete decontraction. Reference is made to a series of 59 subjects divided in 4 groups in accordance with the number of sessions needed to obtain decontraction. It was found that no relation exists between such number and the degree of improvement obtained. On the other hand, it was not possible to determine whether a relation exists between the moment in which decontraction is achieved and the commencement of an improvement in the symptomatology.