Neurofunctional (re)organization underlying narrative discourse processing in aging: evidence from fNIRS
Lilian Cristine Scherer1, Rochele Paz Fonseca, Francine Giroux
1Centre de Recherche Institut Universitaire de Gériatrie de Montréal - CRIUGM, Canada. lilian.scherer@pucrs.br
Brain and Language
|November 22, 2011
Summary
Aging affects language, particularly narrative discourse. This study used functional near-infrared spectroscopy (fNIRS) to reveal age-related brain changes in language processing, supporting neural reserve and compensation theories.
Area of Science:
- Neuroscience
- Cognitive Science
- Linguistics
Background:
- Cognitive changes in the elderly often impact language abilities.
- Research on age-related changes in narrative discourse is limited.
- Understanding these changes is crucial for maintaining quality of life in aging populations.
Purpose of the Study:
- To investigate neurofunctional changes associated with aging in narrative discourse.
- To explore the role of resource allocation in age-related cognitive reorganization.
- To assess the utility of functional near-infrared spectroscopy (fNIRS) in studying these phenomena.
Main Methods:
- Functional near-infrared spectroscopy (fNIRS) was employed to measure brain activity.
- Behavioral data were collected from participants.
- Groups included healthy younger adults, healthy elderly adults, and younger adults with low second language proficiency.
Main Results:
- Older adults exhibited distinct within- and across-hemispheric activation patterns compared to younger adults.
- These age-related patterns showed partial overlap with those of young adults learning a new language.
- fNIRS proved effective in detecting neurofunctional reorganization in complex cognitive tasks.
Conclusions:
- The findings support theories of neural reserve and compensation in aging.
- Age-related language changes involve complex neurofunctional reorganization.
- fNIRS is a suitable tool for studying cognitive aging and language.
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