Modulation of the mechanically evoked perioral reflex during active force dynamics in young adults

Richard D. Andreatta, Steven M. Barlow, Donald S. Finan

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


Mechanically evoked reflex activity in the superior and inferior segments of the orbicularis oris muscle was sampled from three normal females using a specially designed linear motor operating under force feedback. Mechanical inputs delivered to the left upper lip during a ramp-and-hold task produced a composite reflex response characterized by phases of excitation and suppression at the homonymous muscle recording site. The modulation of the evoked composite perioral reflex was found to be dependent upon the rate and phase of force recruitment. The organization of the composite perioral reflex response is discussed in relation to speech motor control and load compensatory mechanisms.

Original languageEnglish
Pages (from-to)175-179
Number of pages5
JournalBrain Research
Issue number1
StatePublished - May 16 1994

Bibliographical note

Funding Information:
This study was supported by a grant from the National Institute on Deafness and other Communication Disorders No. R01 DC00365-07, RC Electronics Incorporated (Goleta, CA) and Neuro Logic Incorporated (Bloomington, IN). Gratitude is expressed towards Mr. Amitava Biswas for the development of graphic and digital signal processing routines.


  • Active force dynamics
  • Adult
  • Electromyography
  • Mechanical stimulation
  • Orbicularis oris
  • Sensorimotor re-action
  • Skin contactor

ASJC Scopus subject areas

  • General Neuroscience
  • Molecular Biology
  • Clinical Neurology
  • Developmental Biology


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