RT Journal Article
T1 Preserved Suppression of Salient Irrelevant Stimuli During Visual Search in Age-Associated Memory Impairment
A1 Lorenzo López, Laura
A1 Maseda, Ana
A1 Buján Mera, Ana
A1 Labra, Carmen de
A1 Amenedo Losada, María Elena
A1 Millán Calenti, José Carlos
K1 AAMI
K1 Automatic attentional capture
K1 ERPs
K1 N2pc
K1 Visual search
AB Previous studies have suggested that older adults with age-associated memory impairment (AAMI) may show a significant decline in attentional resource capacity and inhibitory processes in addition to memory impairment. In the present paper, the potential attentional capture by task-irrelevant stimuli was examined in older adults with AAMI compared to healthy older adults using scalp-recorded event-related brain potentials (ERPs). ERPs were recorded during the execution of a visual search task, in which the participants had to detect the presence of a target stimulus that differed from distractors by orientation. To explore the automatic attentional capture phenomenon, an irrelevant distractor stimulus defined by a different feature (color) was also presented without previous knowledge of the participants. A consistent N2pc, an electrophysiological indicator of attentional deployment, was present for target stimuli but not for task-irrelevant color stimuli, suggesting that these irrelevant distractors did not attract attention in AAMI older adults. Furthermore, the N2pc for targets was significantly delayed in AAMI patients compared to healthy older controls. Together, these findings suggest a specific impairment of the attentional selection process of relevant target stimuli in these individuals and indicate that the mechanism of top-down suppression of entirely task-irrelevant stimuli is preserved, at least when the target and the irrelevant stimuli are perceptually very different.
PB Frontiers Media
YR 2016
FD 2016
LK http://hdl.handle.net/10347/21768
UL http://hdl.handle.net/10347/21768
LA eng
NO Lorenzo-López, L., Maseda, A., Buján, A., de Labra, C., Amenedo, E., y Millán-Calenti, JC. (2016). Preserved Suppression of Salient Irrelevant Stimuli During Visual Search in Age-Associated Memory Impairment. Frontiers Psychology. 6, 2033. doi: 10.3389/fpsyg.2015.02033
DS Minerva
RD 24 abr 2026