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Age-Related Changes to Multisensory Integration and Audiovisual Speech Perception
Jessica L Pepper1, Helen E Nuttall1
1Department of Psychology, Lancaster University, Bailrigg LA1 4YF, UK.
Brain Sciences
|August 26, 2023
Summary
As people age, their ability to integrate multisensory information, crucial for speech perception and environmental awareness, may decline. This decline impacts daily life, highlighting the need for further research into aging and multisensory processing.
Area of Science:
- Neuroscience
- Cognitive Science
- Gerontology
Background:
- Multisensory integration is vital for accurate environmental perception and daily tasks like speech comprehension.
- Ageing can affect both perceptual (e.g., temporal binding window) and cognitive (e.g., attention) factors influencing multisensory integration.
- Changes in multisensory processing with age have significant implications for communication and mobility.
Purpose of the Study:
- To review age-related changes in the perceptual and cognitive mechanisms of multisensory integration.
- To examine the impact of these changes on speech perception and fall risk.
- To investigate the role of alpha-band neural oscillations in modulating multisensory integration during ageing.
Main Methods:
- This review synthesizes existing research on ageing and multisensory integration.
- It examines studies focusing on perceptual and cognitive factors influencing audiovisual integration.
- The review specifically considers the role of neural oscillations, particularly alpha-band activity.
Main Results:
- Ageing is associated with reduced efficiency in multisensory integration, affecting speech perception.
- Cognitive factors like attention and inhibition, and perceptual factors like the temporal binding window, are key mechanisms affected by age.
- Alpha-band oscillations are implicated in the age-related modulation of multisensory processing.
Conclusions:
- Age-related declines in multisensory integration pose risks to communication and safety in the elderly.
- Understanding these changes, especially the role of alpha oscillations, is crucial for developing interventions.
- Further research is needed to fully elucidate the mechanisms underlying age-related multisensory processing deficits.
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