Related Experiment Videos
Visual-vestibular stimulation interferes with information processing in young and older humans.
Joseph M Furman1, Martijn L T M Müller, Mark S Redfern
1Department of Otolaryngology, Eye & Ear Institute Building, University of Pittsburgh School of Medicine, Suite 500, 200 Lothrop Street, 15213, Pittsburgh, PA, USA. furman@pitt.edu
Experimental Brain Research
|August 16, 2003
Summary
Older adults show slower sensory-motor processing during vestibular stimulation. Attention significantly impacts auditory processing, especially with combined visual-vestibular tasks, with greater effects observed in older individuals.
Area of Science:
- Neuroscience
- Sensory Integration
- Aging
Background:
- Attention is crucial for sensory integration and postural control.
- Vestibular and visual-vestibular information processing is vital for maintaining balance.
- Age-related changes can affect sensory processing and cognitive functions.
Purpose of the Study:
- To investigate the role of attention in sensory-motor processing.
- To examine vestibular and visual-vestibular information processing during seated rotations.
- To assess dual-task interference effects on auditory processing.
Main Methods:
- Employed a dual-task interference approach with auditory reaction-time tasks (SRT, DRT, CRT).
- Utilized various visual-vestibular-ocular motor paradigms including seated rotations (EVAR, OVAR) in darkness and with fixation.
- Compared performance between 20 young and 20 older adults.
Main Results:
- Older adults exhibited longer reaction times across all conditions compared to young adults.
- Vestibular stimulation (EVAR, OVAR) increased reaction times in both age groups.
- Concurrent visual-vestibular tasks showed significant interference with auditory processing, particularly in older subjects.
Conclusions:
- Vestibular stimulation can interfere with auditory information processing, potentially via cortical inhibition.
- Age significantly impacts sensory-motor processing, with older adults showing greater susceptibility to dual-task interference.
- Altered vestibulo-ocular reflex (VOR) dynamics were observed, suggesting cerebellar involvement and a reliance on VOR suppression during concurrent tasks.