Document Detail

Orolaryngeal reflex responses to changes in affective state.
MedLine Citation:
PMID:  8558889     Owner:  NLM     Status:  MEDLINE    
Previous research has shown that the eye-blink startle reflex can be modulated by changes in affective state. The purpose of the present study was to determine whether human perioral and trigemino-laryngeal reflexes are sensitive to affective state changes. Impetus for this study comes from theories suggesting that orolaryngeal reflexes may be modulated by affective states, and as such influence voice and speech production. Subjects were 24 classically trained female sopranos (21-35 years). Each produced a pursing lip posture while sustaining the continuant /m/ at 440 Hz and at a comfortable voice intensity level. Simultaneously subjects were shown an aversive, pleasant, or neutral slide (experimental conditions) or no slide (control condition) and received unanticipated, servo-controlled mechanical taps to the midline upper lip. Perioral responses were recorded bilaterally from the orbicularis oris inferior (OOI) muscle using surface electromyography (EMG). Trigemino-laryngeal responses were obtained indirectly by measuring changes in the voltage analog of the voice fundamental frequency (VF0). Reflex responses were detected by smoothing and signal-averaging the VF0 and rectified EMG signals. Response magnitude and latency measures were compared across the affective valence and no-slide conditions. Statistically significant differences were not observed between conditions for the magnitude or temporal measures of either reflex. Significant differences, independent of affective valence, were observed between right and left early excitatory perioral response magnitudes. Differences between the startle and orolaryngeal reflexes, as well as the implications of these findings for speech motor control, are discussed.
K K Larson; S Sapir
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Journal of speech and hearing research     Volume:  38     ISSN:  0022-4685     ISO Abbreviation:  J Speech Hear Res     Publication Date:  1995 Oct 
Date Detail:
Created Date:  1996-02-23     Completed Date:  1996-02-23     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0376336     Medline TA:  J Speech Hear Res     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  990-1000     Citation Subset:  IM    
Wilbur James Gould Voice Research Center, Denver Center for the Performing Arts, CO, USA.
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MeSH Terms
Functional Laterality
Larynx / physiology*
Time Factors
Voice / physiology
Grant Support

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