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Auditory training improves neural timing in the human brainstem.

Nicole M Russo1, Trent G Nicol, Steven G Zecker

  • 1Auditory Neuroscience Laboratory, Northwestern University, 2240 Campus Drive, Evanston, IL 60208, USA. n-russo@northwestern.edu

Behavioural Brain Research
|October 12, 2004
PubMed
Summary
This summary is machine-generated.

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Auditory training improved neural encoding of speech sounds in children with learning impairments. This training enhanced brainstem responses to sound, particularly in noisy environments, suggesting improved auditory processing.

Area of Science:

  • Neuroscience
  • Auditory Neuroscience
  • Speech Processing

Background:

  • Auditory brainstem response (ABR) precisely encodes speech acoustics.
  • Children with learning impairments often show ABR abnormalities, especially in noise.
  • Auditory training aims to remediate perceptual learning problems.

Purpose of the Study:

  • To investigate if auditory training alters neural brainstem encoding of speech in children with learning problems.
  • To assess changes in ABR to the syllable /da/ before and after auditory training.
  • To correlate ABR changes with perceptual, cognitive, and academic measures.

Main Methods:

  • Nine children with language-based learning problems received auditory perceptual training.
  • ABR (transient and sustained responses) were recorded in quiet and noise before and after training.

Related Experiment Videos

  • Control group (10 subjects) received no training but underwent equivalent testing.
  • Additional neurophysiological, perceptual, and cognitive tests were administered.

    • Main Results:

    • The early neural pathway (afferent volley < 11 ms) showed no significant plasticity.
    • Trained children demonstrated increased quiet-to-noise correlations in sustained ABR (11-50 ms), indicating improved encoding precision.
    • Control subjects did not show significant changes in ABR measures.
    • Changes in ABR timing correlated with cortical, perceptual, academic, and cognitive improvements.

    Conclusions:

    • Auditory training can modify preconscious neural encoding of complex sounds in the auditory brainstem.
    • Training improves neural synchrony in the auditory brainstem, enhancing speech sound processing, especially in noise.
    • Auditory training shows potential for remediating learning impairments related to auditory processing.