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In many neurologic conditions, clinicians rely on nonpharmaceutical treatments that aim at restoring function or enabling compensation strategies. Most of these therapeutic interventions are based on empirical observations on the behavioral level. Yet knowledge about the mechanisms underlying the behavioral amelioration of symptoms could help improve therapies and deepen our understanding of the pathologic condition per se. In this issue of Neurology®, Lu et al.1 report changes in functional connectivity of the speech network induced by 1 week of efficient therapy for stuttering. The innovative aspect of this fMRI study is that this measure of engagement of a given brain region in the speech network is acquired while participants are at rest and thus not speaking.
Before therapy, the authors found reduced resting-state functional connectivity (RSFC) between the Broca region and the rest of the speech network, while the left supplementary motor area and cerebellum connected more strongly to the network. Functional connectivity of the Broca region was not altered by therapy. Therapy instead normalized connectivity between the speech network and the …
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