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Group and individual variability in speech production networks during delayed auditory feedback

Agnew, ZK; McGettigan, C; Banks, B; Scott, SK; (2018) Group and individual variability in speech production networks during delayed auditory feedback. The Journal of the Acoustical Society of America , 143 (5) pp. 3009-3023. 10.1121/1.5026500. Green open access

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Abstract

Altering reafferent sensory information can have a profound effect on motor output. Introducing a short delay [delayed auditory feedback (DAF)] during speech production results in modulations of voice and loudness, and produces a range of speech dysfluencies. The ability of speakers to resist the effects of delayed feedback is variable yet it is unclear what neural processes underlie differences in susceptibility to DAF. Here, susceptibility to DAF is investigated by looking at the neural basis of within and between subject changes in speech fluency under 50 and 200 ms delay conditions. Using functional magnetic resonance imaging, networks involved in producing speech under two levels of DAF were identified, lying largely within networks active during normal speech production. Independent of condition, fluency ratings were associated with midbrain activity corresponding to periaqueductal grey matter. Across subject variability in ability to produce normal sounding speech under a 200 ms delay was associated with activity in ventral sensorimotor cortices, whereas ability to produce normal sounding speech under a 50 ms delay was associated with left inferior frontal gyrus activity. These data indicate whilst overlapping cortical mechanisms are engaged for speaking under different delay conditions, susceptibility to different temporal delays in speech feedback may involve different processes.

Type: Article
Title: Group and individual variability in speech production networks during delayed auditory feedback
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1121/1.5026500
Publisher version: https://doi.org/10.1121/1.5026500
Language: English
Additional information: © Author(s) 2018. All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/).
Keywords: delayed auditory feedback (DAF), speech dysfluencies, temporal delays in speech
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences > Institute of Cognitive Neuroscience
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences > Speech, Hearing and Phonetic Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/10050342
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