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Reduced inter-hemispheric interference in ageing: Evidence from a divided field Stroop paradigm.
Jean-François Delvenne1, Julie Castronovo2
1University of Leeds, United Kingdom.
Brain and Cognition
|February 7, 2018
Summary
Older adults show a reduced Stroop effect when stimuli are spatially separated, suggesting age-related corpus callosum thinning may decrease inter-hemispheric interference and enhance parallel processing.
Area of Science:
- Neuroscience
- Cognitive Aging
- Brain Structure and Function
Background:
- The corpus callosum, crucial for inter-hemispheric communication, undergoes age-related degeneration, particularly in anterior sections.
- The functional consequences of this age-related atrophy on inter-hemispheric communication, specifically regarding interference, remain unclear.
Purpose of the Study:
- To investigate whether structural changes in the aging corpus callosum impact inter-hemispheric communication and interference levels.
- To determine if corpus callosum atrophy in older adults leads to altered interference patterns in cognitive tasks.
Main Methods:
- Utilized modified Stroop paradigms with spatially separated target and distracter stimuli.
- Compared performance between young and healthy older adults across two experimental conditions.
Main Results:
- Older adults exhibited a significantly reduced Stroop effect when stimuli were presented in different hemifields compared to the same hemifield.
- This finding indicates a modulation of inter-hemispheric interference based on stimulus location in aging.
Conclusions:
- Age-related thinning of the corpus callosum appears to reduce inter-hemispheric interference.
- This structural change may facilitate parallel information processing between the cerebral hemispheres in older adults.
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