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Two cortical representations of voice control are differentially involved in speech fluency.
Neef, Nicole E; Primaßin, Annika; von Gudenberg, Alexander Wolff; Dechent, Peter; Riedel, Heiner Christian; Paulus, Walter; Sommer, Martin.
Afiliación
  • Neef NE; Department of Clinical Neurophysiology, Georg August University, Göttingen, Göttingen 37075, Germany.
  • Primaßin A; Department of Diagnostic and Interventional Neuroradiology, Georg August University, Göttingen 37075, Germany.
  • von Gudenberg AW; Department of Clinical Neurophysiology, Georg August University, Göttingen, Göttingen 37075, Germany.
  • Dechent P; Institut der Kasseler Stottertherapie, Bad Emstal, Germany.
  • Riedel HC; Department of Cognitive Neurology, MR Research in Neurosciences, Georg August University, Göttingen 37075, Germany.
  • Paulus W; Department of Diagnostic and Interventional Neuroradiology, Georg August University, Göttingen 37075, Germany.
  • Sommer M; Department of Clinical Neurophysiology, Georg August University, Göttingen, Göttingen 37075, Germany.
Brain Commun ; 3(2): fcaa232, 2021.
Article en En | MEDLINE | ID: mdl-33959707
Recent studies have identified two distinct cortical representations of voice control in humans, the ventral and the dorsal laryngeal motor cortex. Strikingly, while persistent developmental stuttering has been linked to a white-matter deficit in the ventral laryngeal motor cortex, intensive fluency-shaping intervention modulated the functional connectivity of the dorsal laryngeal motor cortical network. Currently, it is unknown whether the underlying structural network organization of these two laryngeal representations is distinct or differently shaped by stuttering intervention. Using probabilistic diffusion tractography in 22 individuals who stutter and participated in a fluency shaping intervention, in 18 individuals who stutter and did not participate in the intervention and in 28 control participants, we here compare structural networks of the dorsal laryngeal motor cortex and the ventral laryngeal motor cortex and test intervention-related white-matter changes. We show (i) that all participants have weaker ventral laryngeal motor cortex connections compared to the dorsal laryngeal motor cortex network, regardless of speech fluency, (ii) connections of the ventral laryngeal motor cortex were stronger in fluent speakers, (iii) the connectivity profile of the ventral laryngeal motor cortex predicted stuttering severity (iv) but the ventral laryngeal motor cortex network is resistant to a fluency shaping intervention. Our findings substantiate a weaker structural organization of the ventral laryngeal motor cortical network in developmental stuttering and imply that assisted recovery supports neural compensation rather than normalization. Moreover, the resulting dissociation provides evidence for functionally segregated roles of the ventral laryngeal motor cortical and dorsal laryngeal motor cortical networks.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Brain Commun Año: 2021 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
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XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Tipo de estudio: Prognostic_studies Idioma: En Revista: Brain Commun Año: 2021 Tipo del documento: Article País de afiliación: Alemania Pais de publicación: Reino Unido