Paiva, TeresaNunes, J. SilveiraTeixeira, JorgeMoreira, AnaPargana, Olga2013-01-262013-01-261979Análise Psicológica, 2 (2), 291-2960870-8231http://hdl.handle.net/10400.12/1972Eight patients with tension headache were treated with biofeedback of frontalis E.M.G., four in a true and four in a false condition. Results showed that true biofeedback is more effective than false in lawering frontalis muscle tenson; however, both conditions reduced headache indexes which shows the lack of relationship between muscle tension and clinical simptoms. Other implications are discussed.porjournal article