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Related Concept Videos

Auditory Perception01:17

Auditory Perception

The auditory system is essential for sound perception, utilizing various critical structures. When sound waves enter the outer ear, they travel through the ear canal and cause the eardrum to vibrate. These vibrations are then transmitted to the middle ear, where three tiny bones – the malleus, incus, and stapes – amplify the sound. This amplification is crucial, as it ensures that the sound vibrations are strong enough to be conveyed to the inner ear. These vibrations then reach the cochlea, a...

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An Experimental Paradigm for Measuring the Effects of Ageing on Sentence Processing
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Central auditory processing in aging: the dichotic listening paradigm.

C Hommet1, K Mondon, G Berrut

  • 1CMRR région Centre et Médecine Interne Gériatrique, CHRU de Tours, Tours, France. hommet@med.univ-tours.fr

The Journal of Nutrition, Health & Aging
|November 19, 2010
PubMed
Summary

Older adults show distinct patterns in dichotic listening (DL) tasks, indicating challenges with attentional control and executive functions. These findings highlight the importance of evaluating central auditory dysfunction in aging populations.

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Area of Science:

  • Neuroscience
  • Gerontology
  • Auditory Processing

Background:

  • Cognitive changes are common in aging.
  • Central auditory processing dysfunction may contribute to understanding difficulties in the elderly.
  • The dichotic listening (DL) test is a valuable tool for assessing inter-hemispheric interactions and attention.

Purpose of the Study:

  • To investigate central auditory language processing in right-handed older adults using a dichotic listening task.
  • To examine age-related differences in auditory processing and attentional control.

Main Methods:

  • A cross-sectional study involving two groups: adults aged 50-69 (Ad) and older adults aged 70-89 (Old-Ad).
  • Dichotic listening (DL) tasks included free-recall word and digit forced-attention (forced-right: FR, forced-left: FL) tests.
  • Neuropsychological tests assessed executive functions and cognitive control.

Main Results:

  • Both groups exhibited a right-ear advantage (REA) in free recall, more pronounced in older subjects.
  • Ear asymmetry shifted with instructions in the forced condition (REA in FR, LEA in FL).
  • Older adults showed increased left-ear contamination in the FL condition, suggesting impaired attentional control and mental flexibility.

Conclusions:

  • DL is a useful method for evaluating central auditory dysfunction in aging.
  • Results indicate age-related deficits in attentional control and executive functions.
  • Evaluating central auditory processing in the elderly is crucial for understanding hearing difficulties and informing rehabilitation strategies.