Abstract:
:Studies that have attempted to determine the effects of aging on the brain neural sources of memory retrieval have reported two contrasting age effects: under-recruitment and over-recruitment of several prefrontal areas. However, the causes for these effects are still a matter of debate. In order to study the underlying factors that cause the effects, we compared brain activation in young and older adults, in a successful word retrieval condition, and a failed word retrieval condition: the tip-of-the-tongue state. For this, we used the event-related potentials technique and neural source estimation with low-resolution tomographies. The results showed that the older adults did not display under-recruitment in any brain area in comparison with the young adults. However, they displayed additional prefrontal activation that varied depending on the processing stage and the condition, which supports the hypothesis of selective over-recruitment in older adults.
journal_name
Biol Psycholjournal_title
Biological psychologyauthors
Galdo-Alvarez S,Lindín M,Díaz Fdoi
10.1016/j.biopsycho.2009.06.003subject
Has Abstractpub_date
2009-09-01 00:00:00pages
89-96issue
1eissn
0301-0511issn
1873-6246pii
S0301-0511(09)00126-4journal_volume
82pub_type
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