Document Detail

Potential interactions among linguistic, autonomic, and motor factors in speech.
MedLine Citation:
PMID:  16617462     Owner:  NLM     Status:  MEDLINE    
Though anecdotal reports link certain speech disorders to increases in autonomic arousal, few studies have described the relationship between arousal and speech processes. Additionally, it is unclear how increases in arousal may interact with other cognitive-linguistic processes to affect speech motor control. In this experiment we examine potential interactions between autonomic arousal, linguistic processing, and speech motor coordination in adults and children. Autonomic responses (heart rate, finger pulse volume, tonic skin conductance, and phasic skin conductance) were recorded simultaneously with upper and lower lip movements during speech. The lip aperture variability (LA variability index) across multiple repetitions of sentences that varied in length and syntactic complexity was calculated under low- and high-arousal conditions. High arousal conditions were elicited by performance of the Stroop color word task. Children had significantly higher lip aperture variability index values across all speaking tasks, indicating more variable speech motor coordination. Increases in syntactic complexity and utterance length were associated with increases in speech motor coordination variability in both speaker groups. There was a significant effect of Stroop task, which produced increases in autonomic arousal and increased speech motor variability in both adults and children. These results provide novel evidence that high arousal levels can influence speech motor control in both adults and children.
Jennifer Kleinow; Anne Smith
Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural    
Journal Detail:
Title:  Developmental psychobiology     Volume:  48     ISSN:  0012-1630     ISO Abbreviation:  Dev Psychobiol     Publication Date:  2006 May 
Date Detail:
Created Date:  2006-04-24     Completed Date:  2006-10-17     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0164074     Medline TA:  Dev Psychobiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  275-87     Citation Subset:  IM    
Copyright Information:
(c) 2006 Wiley Periodicals, Inc.
Speech-Language-Hearing Science Program, La Salle University, 1900 W. Olney, Philadelphia, Pennsylvania 19141, USA.
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MeSH Terms
Mandible / physiology*
Movement / physiology*
Personal Autonomy*
Sound Spectrography
Speech / physiology*
Speech Production Measurement
Time Factors
Grant Support

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