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Ultrasound Images of the Tongue: A Tutorial for Assessment and Remediation of Speech Sound Errors
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Speech lateralization and motor control.

Jessica C Hodgson1, John M Hudson1

  • 1School of Psychology, University of Lincoln, Lincoln, United Kingdom.

Progress in Brain Research
|August 12, 2018
PubMed
Summary
This summary is machine-generated.

Motor control and speech lateralization are linked, with handedness predicting speech representation. Impaired motor skills correlate with atypical speech lateralization, suggesting connected neural systems.

Keywords:
LateralizationMotor controlSpeech productionSpeech–praxis modelTranscranial Doppler

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Human Brain Function

Background:

  • A link between motor control and speech lateralization is theorized.
  • The precise relationship between motor control and speech representation remains underexplored.

Purpose of the Study:

  • To examine the organization, development, and measurement of motor control and speech representation.
  • To investigate the connection between motor skills and speech lateralization from multiple perspectives.

Main Methods:

  • Utilized functional transcranial Doppler ultrasonography to assess speech laterality.
  • Correlated speech laterality with hand preference and pegboard measures of motor laterality.
  • Examined neuropsychological, developmental, neurological, and genetic factors.

Main Results:

  • Handedness, assessed via motor skills, predicts speech laterality in adults and children.
  • Individuals with developmental motor coordination impairments exhibit atypical speech lateralization.
  • Findings support an intrinsic connection between neurological motor and speech systems.

Conclusions:

  • Speech and fine motor control share left-hemisphere neural networks for planning and sequencing.
  • A left-lateralized speech-praxis center model may explain the motor-speech task relationship.
  • Motor and speech systems are intrinsically connected in the human brain.