Dual-task performance in Parkinson disease (Whitfield et al., 2019) Jason A. Whitfield Zoe Kriegel Adam M. Fullenkamp Daryush D. Mehta 10.23641/asha.8637008.v1 https://asha.figshare.com/articles/media/Dual-task_performance_in_Parkinson_disease_Whitfield_et_al_2019_/8637008 <div><b>Purpose: </b>Prior investigations suggest that simultaneous performance of more than 1 motor-oriented task may exacerbate speech motor deficits in individuals with Parkinson disease (PD). The purpose of the current investigation was to examine the extent to which performing a low-demand manual task affected the connected speech in individuals with and without PD.</div><div><b>Method: </b>Individuals with PD and neurologically healthy controls performed speech tasks (reading and extemporaneous speech tasks) and an oscillatory manual task (a counterclockwise circle-drawing task) in isolation (single-task condition) and concurrently (dual-task condition).</div><div><b>Results:</b> Relative to speech task performance, no changes in speech acoustics were observed for either group when the low-demand motor task was performed with the concurrent reading tasks. Speakers with PD exhibited a significant decrease in pause duration between the single-task (speech only) and dual-task conditions for the extemporaneous speech task, whereas control participants did not exhibit changes in any speech production variable between the single- and dual-task conditions.</div><div><b>Conclusions: </b>Overall, there were little to no changes in speech production when a low-demand oscillatory motor task was performed with concurrent reading. For the extemporaneous task, however, individuals with PD exhibited significant changes when the speech and manual tasks were performed concurrently, a pattern that was not observed for control speakers.</div><div><br></div><div><b>Supplemental Material S1.</b> Visual representation of the algorithm used to compute within- trial kinematic variation. The standard deviation of the radius was calculated by first computing the standard deviations of all cycle radii within the 10-degree windows, and then the standard deviations from each window were averaged to arrive at an aggregate variance metric.</div><div><br></div><div><b>Supplemental Material S2.</b> Animation of 30 seconds of a manual movement trace produced by a control participant in the single-task condition (i.e., circling alone).</div><div><br></div><div><b>Supplemental Material S3.</b> Animation of 30 seconds of a manual movement trace produced by a participant with Parkinson disease (PD) in the single-task condition (i.e., circling alone). Note: the Hoehn and Yahr (H&Y) stage for this participant was 3.</div><div><br></div><div>Whitfield, J. A., Kriegel, Z., Fullenkamp, A. M., & Mehta, D. D. (2019). Effects of concurrent manual task performance on connected speech acoustics in individuals with Parkinson disease. <i>Journal of Speech, Language, and Hearing Research, 62</i>, 2099–2117. https://doi.org/10.1044/2019_JSLHR-S-MSC18-18-0190</div><div><br></div><div><b>Publisher Note: </b>This article is part of the Forum: Selected Papers From the 2018 Conference on Motor Speech—Basic Science and Clinical Innovation.</div><div><br></div> 2019-07-15 21:27:34 speech Parkinson Parkinson disease effects concurrent manual task performance connected acoustics simultaneous motor speech motor deficits impairment motor system controls neurological reading oscillatory single-task dual-task pause extemporaneous production daily living effort secondary attention resources Linguistic Processes (incl. Speech Production and Comprehension) Acoustics and Acoustical Devices; Waves