title: The relationship between frontalis muscle activity and self-reports of headache pain.
mesh_terms: D000328:Adult; D001676:Biofeedback, Psychology; D004576:Electromyography; D005152:Facial Muscles / Q000503:physiopathology*; D005260:Female; D006261:Headache / Q000503:physiopathology* / Q000523:psychology; D006801:Humans; D008875:Middle Aged; D009119:Muscle Contraction