Abstract:
:Pseudoneglect is a slight but consistent leftward attentional bias commonly observed in healthy young populations, purportedly explained by right hemispheric dominance. It has been suggested that normal aging might be associated with a decline of the right hemisphere. According to this hypothesis, a few studies have shown that elderly tend to exhibit a rightward attentional bias in line bisection. In the present study, we tested this hypothesis in young and older participants using a perceptual landmark task. Results yield evidence for an age-related shift, from a strong attentional leftward bias in young adults toward a suppressed or even a reversed bias in the elderly. Right hemisphere impairment coupled to a left hemispheric compensation might explain the perceptual shift observed in older adults. However, a decline in corpus callosum function cannot be excluded. Alternatively, these results may be in agreement with the hypothesis of an age-related specific inhibition of return dysfunction, an overt attentional orienting mechanism, and/or a decrease of dopamine.
journal_name
Brain Cognjournal_title
Brain and cognitionauthors
Schmitz R,Peigneux Pdoi
10.1016/j.bandc.2011.04.002subject
Has Abstractpub_date
2011-08-01 00:00:00pages
382-9issue
3eissn
0278-2626issn
1090-2147pii
S0278-2626(11)00069-8journal_volume
76pub_type
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