Control and prediction components of movement planning in stuttering versus nonstuttering adults

Ayoub Daliri, Roman A. Prokopenko, J. Randall Flanagan, Ludo Max

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Purpose: Stuttering individuals show speech and nonspeech sensorimotor deficiencies. To perform accurate movements, the sensorimotor system needs to generate appropriate control signals and correctly predict their sensory consequences. Using a reaching task, we examined the integrity of these control and prediction components separately for movements unrelated to the speech motor system.

Method: Nine stuttering and 9 nonstuttering adults made fast reaching movements to visual targets while sliding an object under the index finger. To quantify control, we determined initial direction error and end point error. To quantify prediction, we calculated the correlation between vertical and horizontal forces applied to the object—an index of how well vertical force (preventing slip) anticipated direction-dependent variations in horizontal force (moving the object).

Results: Directional and end point error were significantly larger for the stuttering group. Both groups performed similarly in scaling vertical force with horizontal force.

Conclusions: The stuttering group’s reduced reaching accuracy suggests limitations in generating control signals for voluntary movements, even for nonorofacial effectors. Typical scaling of vertical force with horizontal force suggests an intact ability to predict the consequences of planned control signals. Stuttering may be associated with generalized deficiencies in planning control signals rather than predicting the consequences of those signals.

Original languageEnglish (US)
Pages (from-to)2131-2141
Number of pages11
JournalJournal of Speech, Language, and Hearing Research
Volume57
Issue number6
DOIs
StatePublished - Dec 1 2014
Externally publishedYes

Fingerprint

Stuttering
planning
scaling
Aptitude
Group
Fingers
integrity
Planning
Prediction
ability

ASJC Scopus subject areas

  • Language and Linguistics
  • Linguistics and Language
  • Speech and Hearing

Cite this

Control and prediction components of movement planning in stuttering versus nonstuttering adults. / Daliri, Ayoub; Prokopenko, Roman A.; Flanagan, J. Randall; Max, Ludo.

In: Journal of Speech, Language, and Hearing Research, Vol. 57, No. 6, 01.12.2014, p. 2131-2141.

Research output: Contribution to journalArticle

Daliri, Ayoub ; Prokopenko, Roman A. ; Flanagan, J. Randall ; Max, Ludo. / Control and prediction components of movement planning in stuttering versus nonstuttering adults. In: Journal of Speech, Language, and Hearing Research. 2014 ; Vol. 57, No. 6. pp. 2131-2141.
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