Nestoriuc, Rief, and Martin (2008) conducted a meta-analysis that included a total of 53 biofeedback treatment studies of tension-type headache. Nestoriuc et al. (2008) noted that this was the first meta-analytic study with sufficient power to find that the treatments led to significantly reduced muscle tension. Why is this important?
What will be an ideal response?
It is important because it establishes a missing physiological link between the theory of muscle tension reduction and its relation to headache symptom reduction. The link had been hypothesized but never firmly established in previous meta-analyses. This had caused some earlier researchers to speculate that EMG biofeedback-mediated headache symptom reductions were probably wholly psychologically driven rather than at least partly related to reductions in muscle tension that were presumed to more directly underlie the pathophysiology of the tension-type headache. Now there appears to be good evidence establishing the physiological link for biofeedback efficacy in treating tension-type headache.
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