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Development of speech motor control: Lip movement variability.

Löfqvist, Anders LU ; Frid, Johan and Schötz, Susanne (2011) In The Journal of the Acoustical Society of America 130(4).
Abstract
This study examined variability of lip movements across repetitions of the same utterance as a function of age in Swedish speakers. Subjects were 37 typically developed Swedish children and adults (19 females, 18 males, aged 5-31 yr). Lip movements were recorded during 15-20 repetitions of a short Swedish phrase using articulography, with a sampling rate of 200 Hz. After correction for head movements, the kinematic records were expressed in a maxilla-based coordinate system. Movement onset and offset of the utterance were identified using kinematic landmarks. The Euclidean distance between receivers on the upper and lower lips was calculated and subjected to functional data analysis [Ramsay etal., J. Acoust. Soc. Am. 99, 3718-3727 (1996)]... (More)
This study examined variability of lip movements across repetitions of the same utterance as a function of age in Swedish speakers. Subjects were 37 typically developed Swedish children and adults (19 females, 18 males, aged 5-31 yr). Lip movements were recorded during 15-20 repetitions of a short Swedish phrase using articulography, with a sampling rate of 200 Hz. After correction for head movements, the kinematic records were expressed in a maxilla-based coordinate system. Movement onset and offset of the utterance were identified using kinematic landmarks. The Euclidean distance between receivers on the upper and lower lips was calculated and subjected to functional data analysis [Ramsay etal., J. Acoust. Soc. Am. 99, 3718-3727 (1996)] to assess both temporal and spatial variabilities. Results show a decrease in both indices as a function of age, with a greater reduction of amplitude variability. [Work supported by grant 349-2007-8695 from the Swedish Research Council.]. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
The Journal of the Acoustical Society of America
volume
130
issue
4
publisher
American Institute of Physics
external identifiers
  • PMID:21974347
ISSN
1520-8524
DOI
10.1121/1.3655188
language
English
LU publication?
yes
id
1762e693-198f-40fd-80b5-3a15c1c94546 (old id 2200797)
alternative location
http://www.ncbi.nlm.nih.gov/pubmed/21974347?dopt=Abstract
date added to LUP
2011-11-02 08:09:10
date last changed
2016-09-14 12:50:50
@article{1762e693-198f-40fd-80b5-3a15c1c94546,
  abstract     = {This study examined variability of lip movements across repetitions of the same utterance as a function of age in Swedish speakers. Subjects were 37 typically developed Swedish children and adults (19 females, 18 males, aged 5-31 yr). Lip movements were recorded during 15-20 repetitions of a short Swedish phrase using articulography, with a sampling rate of 200 Hz. After correction for head movements, the kinematic records were expressed in a maxilla-based coordinate system. Movement onset and offset of the utterance were identified using kinematic landmarks. The Euclidean distance between receivers on the upper and lower lips was calculated and subjected to functional data analysis [Ramsay etal., J. Acoust. Soc. Am. 99, 3718-3727 (1996)] to assess both temporal and spatial variabilities. Results show a decrease in both indices as a function of age, with a greater reduction of amplitude variability. [Work supported by grant 349-2007-8695 from the Swedish Research Council.].},
  articleno    = {2548},
  author       = {Löfqvist, Anders and Frid, Johan and Schötz, Susanne},
  issn         = {1520-8524},
  language     = {eng},
  number       = {4},
  publisher    = {American Institute of Physics},
  series       = {The Journal of the Acoustical Society of America},
  title        = {Development of speech motor control: Lip movement variability.},
  url          = {http://dx.doi.org/10.1121/1.3655188},
  volume       = {130},
  year         = {2011},
}