title: Electrode placement, EMG feedback, and relaxation for tension headaches.
mesh_terms: D000328:Adult; D000368:Aged; D001676:Biofeedback, Psychology; D004566:Electrodes; D004576:Electromyography / Q000379:methods*; D005260:Female; D006261:Headache / Q000628:therapy*; D006801:Humans; D008297:Male; D008875:Middle Aged; D008881:Migraine Disorders / Q000628:therapy; D009119:Muscle Contraction; D009126:Muscle Relaxation