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Visual and visuomotor interhemispheric transfer time in older adults
Brian Scally1, Melanie Rose Burke1, David Bunce1
1School of Psychology, University of Leeds, Leeds, UK.
Neurobiology of Aging
|February 7, 2018
Summary
Aging does not impair interhemispheric transfer in older adults, contrary to previous beliefs. This study found preserved visuomotor and visual transfer functions, likely due to intact posterior corpus callosum regions.
Area of Science:
- Neuroscience
- Cognitive Aging
- Neuroimaging
Background:
- Older adults often show reduced structural integrity in anterior corpus callosum regions.
- Despite this, interhemispheric transfer, crucial for brain communication, is reported to decline with age.
Purpose of the Study:
- To investigate if aging affects interhemispheric transfer using electrophysiological measures.
- To compare transfer efficiency between young and older adult groups.
Main Methods:
- Utilized constrained event-related potential analysis in theta and alpha frequency bands.
- Employed crossed-uncrossed difference and lateralized visual evoked potentials.
- Assessed interhemispheric transfer in young (18-27) and older (63-80) adults.
Main Results:
- No significant differences in crossed-uncrossed difference measures between age groups.
- Older adults showed theta band transfer changes attributed to contralateral latency, not ipsilateral delay.
- A trend towards quicker alpha band transfer was observed in older adults.
Conclusions:
- Older adults maintain interhemispheric transfer efficiency in visuomotor and visual domains.
- These functions are likely supported by posterior corpus callosum, which remains structurally intact with aging.
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