The purpose of this study was to investigate potential differences in autonomic nervous system activity to emotional stimuli between preschool-age children who do and do not stutter. The authors suggested that preschool-age children who stutter have a physiological state that is characterized by a greater vulnerability to emotional reactivity and a greater mobilization of resources in support of emotional reactivity during positive conditions, and that parasympathetic and sympathetic nervous system activity is involved.
Jones, Robin M., Buhr, Anthony P., Conture, Edward G., Tumanova, Victoria, Waledn, Tedra A., and Porges, Stephen W. (2014). Autonomic nervous system activity of preschool-age children who stutter. Journal of Fluency Disorders. DOI: 10.1016/j.jfludis.2014.06.002