Mechanosensory Modulation of Perioral Neuronal Groups During Active Force Dynamics The spatiotemporal organization of the mechanically evoked perioral sensorimotor response was sampled from five normal females using a custom-designed linear motor operating under force feedback. Electromyographic activity was sampled from the superior and inferior segments of the orbicularis oris muscle during the production of a visually guided ramp-and-hold lip-rounding task. ... Research Article
Research Article  |   October 01, 1996
Mechanosensory Modulation of Perioral Neuronal Groups During Active Force Dynamics
 
Author Affiliations & Notes
  • Richard D. Andreatta
    Department of Speech and Hearing Sciences and Program in Neural Science Indiana University Bloomington
  • Steven M. Barlow
    Department of Speech and Hearing Sciences and Program in Neural Science Indiana University Bloomington
  • Amitava Biswas
    Department of Speech and Hearing Sciences and Program in Neural Science Indiana University Bloomington
  • Donald S. Finan
    Department of Speech and Hearing Sciences and Program in Neural Science Indiana University Bloomington
  • Contact author: S. M. Barlow, PhD, Speech-Orofacial Physiology and Biomechanics Laboratory, Department of Speech and Hearing Sciences and Program in Neural Science, Room 114—Speech and Hearing Sciences Building, 3rd and Jordan, Indiana University, Bloomington, IN 47405. Email: sbarlow@indiana.edu
Article Information
Research Issues, Methods & Evidence-Based Practice / Speech / Research Articles
Research Article   |   October 01, 1996
Mechanosensory Modulation of Perioral Neuronal Groups During Active Force Dynamics
Journal of Speech, Language, and Hearing Research, October 1996, Vol. 39, 1006-1017. doi:10.1044/jshr.3905.1006
History: Received December 4, 1995 , Accepted April 19, 1996
 
Journal of Speech, Language, and Hearing Research, October 1996, Vol. 39, 1006-1017. doi:10.1044/jshr.3905.1006
History: Received December 4, 1995; Accepted April 19, 1996

The spatiotemporal organization of the mechanically evoked perioral sensorimotor response was sampled from five normal females using a custom-designed linear motor operating under force feedback. Electromyographic activity was sampled from the superior and inferior segments of the orbicularis oris muscle during the production of a visually guided ramp-and-hold lip-rounding task. Brief mechanical inputs of approximately 0.45 N delivered to the left upper lip during the ramp-and-hold task produced a composite myogenic response characterized by phases of excitation and suppression. Modulation of the primary excitatory component (R1) of the mechanically evoked perioral response was found to be highly dependent upon the rate of force recruitment (1 N/s vs. 4 N/s) and the phase of force recruitment (20% vs. 50% vs. 80% of 1 N end-point force). Modulation of later occurring inhibitory (S1) and excitatory (R2) potentials were also found to be dependent upon differences in the rate and phase of force recruitment. The organization of the perioral sensorimotor response is considered in relation to speech motor control and the dynamic organization of neuronal groups subserving perioral sensorimotor activity.

Acknowledgments
This study was supported by a grant from the National Institute on Deafness and other Communication Disorders #R01 DC00365-08, RC Electronics Incorporated (Goleta, CA), and Neuro Logic Incorporated (Bloomington, IN).
Order a Subscription
Pay Per View
Entire Journal of Speech, Language, and Hearing Research content & archive
24-hour access
This Article
24-hour access