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An Emerging Target Paradigm to Evoke Fast Visuomotor Responses on Human Upper Limb Muscles
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Sensorimotor integration on a rapid time scale.

Jinhong Luo1, Ninad B Kothari2, Cynthia F Moss2

  • 1Department of Psychological and Brain Sciences, Johns Hopkins University, Baltimore, MD 21218 jluo18@jhu.edu.

Proceedings of the National Academy of Sciences of the United States of America
|June 7, 2017
PubMed
Summary
This summary is machine-generated.

The Lombard effect, a vocal adjustment to noise, occurs within 30 ms. Bats

Keywords:
echolocationenvironmental noisemotor controlsensorimotor integrationvocal production

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Area of Science:

  • Neuroscience
  • Bioacoustics
  • Auditory perception

Background:

  • Sensing guides movement control, but vocalizations are complex.
  • Previous research focused on visually guided movements.
  • Vocalizations are difficult to study due to their speed and variability.

Purpose of the Study:

  • To measure and model sensory information transfer for vocal amplitude control.
  • To investigate the Lombard effect in response to background noise.
  • To analyze the time course of the Lombard effect on a millisecond timescale.

Main Methods:

  • Studied echolocating bats for their brief vocalizations.
  • Measured vocal amplitude adjustments in response to background noise.
  • Developed a quantitative audiomotor model for the Lombard effect.

Main Results:

  • The Lombard effect shows a rapid response latency of 30 ms.
  • Vocal adjustments are guided by continuous integration of background noise levels.
  • Temporal summation underlies rapid vocal-motor adjustments.

Conclusions:

  • The Lombard effect involves rapid, integrated audiomotor processing.
  • Findings provide a model for audiomotor integration in various species.
  • This research advances understanding of sensorimotor control in vocalizations.