title: Coordination between posture and phonation in vocal effort behavior.
abstract: BACKGROUND
  Postural correlates of vocal effort are rarely described in the literature, while they are extensively dealt with in speech therapy.
  
  
  OBJECTIVE
  This study aims at determining whether body movement is a side effect of vocal effort or an integral part of communication effort behavior. The answer to this question is mainly based on correlations between posture and phonation.
  
  
  METHODS
  Twenty healthy subjects participated in this study. They had to communicate with a listener under 3 conditions requiring different levels of vocal effort.
  
  
  RESULTS
  The vocal parameters increased and confirmed that the subjects had made a vocal effort. The kinematic parameters (amplitude and duration of body movement) increased with vocal effort. Lastly, vocal and kinematic characteristics were significantly correlated.
  
  
  CONCLUSIONS
  The close correlation of posture with vocal production shows that movement is not a mere consequence of vocal effort. Posture and voice are coordinated in communication behavior, and each body segment plays its specific role in the vocal effort behavior.
authors.affiliation: Department of Otorhinolaryngology, Hôpital de la Timone, Marseille, France. aude.lagier@laposte.net
authors.forename: Aude
authors.initials: A
authors.lastname: Lagier
authors.forename: Marianne
authors.initials: M
authors.lastname: Vaugoyeau
authors.forename: Alain
authors.initials: A
authors.lastname: Ghio
authors.forename: Thierry
authors.initials: T
authors.lastname: Legou
authors.forename: Antoine
authors.initials: A
authors.lastname: Giovanni
authors.forename: Christine
authors.initials: C
authors.lastname: Assaiante
mesh_terms: D000005:Abdomen / Q000502:physiology; D000328:Adult; D001696:Biomechanical Phenomena; D003142:Communication; D004568:Electrodiagnosis; D005260:Female; D005931:Glottis / Q000502:physiology; D019416:Head Movements / Q000502:physiology; D006801:Humans; D009043:Motor Activity / Q000502:physiology; D010699:Phonation / Q000502:physiology*; D011187:Posture / Q000502:physiology*; D013018:Sound Spectrography; D013061:Speech Acoustics; D013647:Task Performance and Analysis; D013848:Thigh / Q000502:physiology; D013997:Time Factors; D014831:Voice / Q000502:physiology*; D014833:Voice Quality / Q000502:physiology; D055815:Young Adult