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Association between high-frequency hearing sensitivity and visual cross-modal plasticity during active visual

Brandon T Paul1, Arunan Srikanthanathan2, Maya Daien2

  • 1Department of Psychology, Toronto Metropolitan University, Toronto, Ontario, Canada.

Journal of Neurophysiology
|December 23, 2025
PubMed
Summary
This summary is machine-generated.

Mild high-frequency hearing loss is linked to cross-modal plasticity, where the auditory cortex shows increased visual activation. This suggests sensory compensation even with partial hearing impairment.

Keywords:
agecross-modal plasticityhearing lossshort-term memoryvisual evoked potentials

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Area of Science:

  • Neuroscience
  • Auditory and Visual Processing

Background:

  • Cross-modal plasticity occurs when sensory deprivation leads to heightened sensitivity in other senses.
  • This phenomenon is well-documented in deafness but less understood in mild hearing loss.
  • Previous research links cross-modal plasticity to enhanced visual perception.

Purpose of the Study:

  • To investigate cross-modal plasticity in adults with mild high-frequency hearing loss.
  • To determine if this plasticity is associated with visual short-term memory recall.
  • To explore the neural correlates of auditory deprivation in partial hearing loss.

Main Methods:

  • Twenty-five participants (aged 18-78) with varying high-frequency hearing loss underwent a modified Sternberg task.
  • Electroencephalography (EEG) recorded brain activity during visual encoding and memory recall.
  • Behavioral performance and neural oscillations were analyzed in relation to hearing sensitivity and age.

Main Results:

  • Worse high-frequency hearing sensitivity correlated with larger visual N1 amplitudes and longer P2 latencies.
  • Age was associated with shorter P2 latencies.
  • Source analysis revealed increased N1 amplitude in the right auditory cortex with poorer high-frequency hearing, not visual cortex.

Conclusions:

  • Mild high-frequency hearing loss is associated with cross-modal plasticity, evidenced by increased auditory cortex activation during visual tasks.
  • This suggests sensory compensation mechanisms engage even with subtle hearing impairments.
  • The findings highlight the brain's adaptability in response to sensory changes.