Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Cerebral averaged potentials preceding oral movement.

A B Wohlert1, C R Larson

  • 1Northwestern University, Evanston, IL.

Journal of Speech and Hearing Research
|December 1, 1991
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Comparison of voice F0 responses to pitch-shift onset and offset conditions.

The Journal of the Acoustical Society of America·2002
Same author

Effect of duration of pitch-shifted feedback on vocal responses in patients with Parkinson's disease.

Journal of speech, language, and hearing research : JSLHR·2001
Same author

Swallowing and tongue function following treatment for oral and oropharyngeal cancer.

Journal of speech, language, and hearing research : JSLHR·2001
Same author

Effects of delayed auditory feedback (DAF) on the pitch-shift reflex.

The Journal of the Acoustical Society of America·2001
Same author

Lip muscle activity related to speech rate and loudness.

Journal of speech, language, and hearing research : JSLHR·2000
Same author

Instructing subjects to make a voluntary response reveals the presence of two components to the audio-vocal reflex.

Experimental brain research·2000
Same journal

Temporal resolution in infancy and subsequent language development.

Journal of speech and hearing research·1996
Same journal

Evidence of sensitivity to structural contrasts in the literature on children's language comprehension.

Journal of speech and hearing research·1996
Same journal

Narrative development in late talkers: early school age.

Journal of speech and hearing research·1996
Same journal

A system for the diagnosis of specific language impairment in kindergarten children.

Journal of speech and hearing research·1996
Same journal

Interactive focused stimulation for toddlers with expressive vocabulary delays.

Journal of speech and hearing research·1996
Same journal

Auditory lexical decisions of children with specific language impairment.

Journal of speech and hearing research·1996
See all related articles

The readiness potential, a brain signal before movement, shows bilateral control for lip protrusion, unlike unilateral control for finger movements. This suggests lip control is not always a dominant hemisphere function.

Area of Science:

  • Neuroscience
  • Motor Control
  • Electrophysiology

Background:

  • The readiness potential (RP) is an electrophysiological signal preceding voluntary movement.
  • Previous studies suggest dominant hemisphere activation for speech, a midline movement.
  • It's unclear if nonspeech midline movements also involve dominant hemisphere control.

Purpose of the Study:

  • To investigate the cortical control patterns for a stereotyped, nonspeech lip movement.
  • To compare the RP of lip protrusion with that of a unilateral finger movement.

Main Methods:

  • Recorded averaged potentials (RPs) from scalp sites (vertex, bilateral motor cortex).
  • Subjects performed voluntary lip protrusion and right finger extension tasks.
  • Compared RP amplitude distribution between the two tasks.

Related Experiment Videos

Main Results:

  • Both tasks showed initial slow negative potentials.
  • Finger extension RP showed greatest negativity over the left motor cortex (contralateral control).
  • Lip protrusion RP showed even negativity over bilateral motor cortices (bilateral control).

Conclusions:

  • Nonspeech lip protrusion, involving a midline structure, is under bilateral cortical control.
  • Lip movement control is not necessarily a dominant hemisphere function.
  • Dominant hemisphere control might be employed for more complex movements like speech.