Cortical dynamics of disfluency in adults who stutter. Issue 9 (8th May 2017)

• Record Type: Journal Article
• Authors: Sengupta, Ranit; Shah, Shalin; Loucks, Torrey M. J.; Pelczarski, Kristin; Scott Yaruss, J.; Gore, Katie; Nasir, Sazzad M.
• Is Part Of: Physiological reports. Volume 5:Issue 9(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-05-08
• Subjects: Disfluent speech -- neural oscillations -- phase coherence -- stuttering; Physiology -- Periodicals; 571
• DOI: 10.14814/phy2.13194
• Languages: English
• ISSNs: 2051-817X

Abstract

Abstract: Stuttering is a disorder of speech production whose origins have been traced to the central nervous system. One of the factors that may underlie stuttering is aberrant neural miscommunication within the speech motor network. It is thus argued that disfluency (any interruption in the forward flow of speech) in adults who stutter (AWS) could be associated with anomalous cortical dynamics. Aberrant brain activity has been demonstrated in AWS in the absence of overt disfluency, but recording neural activity during disfluency is more challenging. The paradigm adopted here took an important step that involved overt reading of long and complex speech tokens under continuous EEG recording. Anomalies in cortical dynamics preceding disfluency were assessed by subtracting out neural activity for fluent utterances from their disfluent counterparts. Differences in EEG spectral power involving alpha, beta, and gamma bands, as well as anomalies in phase‐coherence involving the gamma band, were observed prior to the production of the disfluent utterances. These findings provide novel evidence for compromised cortical dynamics that directly precede disfluency in AWS. Abstract : The present study is the first of its kind to investigate the role of cortical oscillations in disfluencies of adults who stutter (AWS). Using a paradigm of neural phase coherence the findings reported here provide evidence for aberrant communication within brain network that precedes stuttered disfluencies.