title: The effect of postural variation on the electromyographic evaluation of tension headache and nonheadache control participants.
mesh_terms: D004576:Electromyography; D005260:Female; D006261:Headache / Q000175:diagnosis*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009119:Muscle Contraction; D011187:Posture; D013315:Stress, Psychological / Q000150:complications*