WWW.JNEUROSCI.ORG
-
The Journal of Neuroscience MBF Stereo Investigator
QUICK SEARCH:   [advanced]


     
-


HOME  |   SEARCH  |   ARCHIVE  |   SUBSCRIBE  |   CONTACT  |   HELP
This Article
Right arrow Full Text (PDF)
Right arrow Submit an eLetter
Right arrow Alert me when this article is cited
Right arrow Alert me when eLetters are posted
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Gracco, V. L.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Gracco, V. L.

 Previous Article  |  Next Article 

Journal of Neuroscience, Vol 8, 4628-4639, Copyright © 1988 by Society for Neuroscience

ARTICLE

Timing factors in the coordination of speech movements

VL Gracco
Haskins Laboratories, New Haven, Connecticut 06511.

Speech movement coordination involves substantial timing adjustments among multiple degrees of muscles and movement freedom. The present investigation examined the kinematic and muscle timing adjustments associated with the production of select speech movements. For oral closing movements, the timing of the upper lip, lower lip, and jaw peak velocities were found to be tightly coupled, apparently reflecting a coordinative strategy. In contrast, oral opening movements demonstrated reduced temporal coupling and inconsistent sequencing across subjects. Overall, it appears that the temporal organization of speech movements varies with the specific movement goals. In order to evaluate the coordinative patterns for oral closing in detail, the temporal adjustments of multiple perioral muscles associated with the systematic closing peak velocity relations were examined. The relative timing of muscle onsets and peak EMG amplitudes was found to be predictably related to the peak velocity timing variations, suggesting that the motor commands are temporally scaled to generate changes in speaking conditions. It was also found that the mechanical properties of the speech articulators influence movement coordination and can be exploited to maximize movement efficiency. The systematic change in muscle timing characteristics for all synergistic muscles apparently reduces the degrees of freedom to control, thereby facilitating the coordination process.


This article has been cited by other articles:


Home page
 J. Neurol. Neurosurg. PsychiatryHome page
F Klostermann, F Ehlen, J Vesper, K Nubel, M Gross, F Marzinzik, G Curio, and T Sappok
Effects of subthalamic deep brain stimulation on dysarthrophonia in Parkinson's disease
J. Neurol. Neurosurg. Psychiatry, May 1, 2008; 79(5): 522 - 529.
[Abstract] [Full Text] [PDF]

Home page
 JSLHRHome page
J. R. Green, E. M. Wilson, Y.-T. Wang, and C. A. Moore
Estimating Mandibular Motion Based on Chin Surface Targets During Speech
J Speech Lang Hear Res, August 1, 2007; 50(4): 928 - 939.
[Abstract] [Full Text] [PDF]

Home page
 JSLHRHome page
H. Y. Cheng, B. E. Murdoch, J. V. Goozee, and D. Scott
Physiologic Development of Tongue-Jaw Coordination From Childhood to Adulthood
J Speech Lang Hear Res, April 1, 2007; 50(2): 352 - 360.
[Abstract] [Full Text] [PDF]

Home page
 J. Neurosci.Home page
Y. Gutfreund, T. Flash, Y. Yarom, G. Fiorito, I. Segev, and B. Hochner
Organization of Octopus Arm Movements: A Model System for Studying the Control of Flexible Arms
J. Neurosci., November 15, 1996; 16(22): 7297 - 7307.
[Abstract] [Full Text] [PDF]


-

Home  |   Search  |   Archive  |   Subscribe  |   Contact  |   Help
-
Copyright 2008 by Society for Neuroscience ONLINE ISSN: 1529-2401
-