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Age-related effects on event-related brain potentials in a congruence/incongruence judgment color-word Stroop task.

Zurrón M, Lindín M, Galdo-Alvarez S, Díaz F - Front Aging Neurosci (2014)

Bottom Line: The Stroop effect occurred in both age groups, with longer reaction times in the older group than in the young group for both types of stimuli, but no difference in the number of errors made by either group.Furthermore, the P3b amplitude was maximal at frontal locations in older participants and at parietal locations in young participants.The age-related increase in perceptual resources and the posterior-to-anterior shift in older adults support adaptive reorganization of the neural networks involved in the processing of this Stroop-type task.

View Article: PubMed Central - PubMed

Affiliation: Department of Clinical Psychology and Psychobiology, University of Santiago de Compostela Santiago de Compostela, Spain.

ABSTRACT
We examined the event-related brain potentials elicited by color-word stimuli in a Stroop task in which healthy participants (young and old) had to judge whether the meaning and the color of the stimulus were congruent or incongruent. The Stroop effect occurred in both age groups, with longer reaction times in the older group than in the young group for both types of stimuli, but no difference in the number of errors made by either group. Although the N2 and P3b latencies were longer in the older than in the younger group, there were no differences between groups in the latencies of earlier event-related potential components, and therefore the age-related processing slowing is not generalized. The frontal P150 amplitude was larger, and the parietal P3b amplitude was smaller, in the older than in the younger group. Furthermore, the P3b amplitude was maximal at frontal locations in older participants and at parietal locations in young participants. The age-related increase in perceptual resources and the posterior-to-anterior shift in older adults support adaptive reorganization of the neural networks involved in the processing of this Stroop-type task.

No MeSH data available.


Related in: MedlinePlus

Voltage (A) and current source density (CSD; B) maps at the maximum peaks of P150/N170 (140 ms for young and old groups), N2 (260 ms for young group and 320 ms for old group), and P3b (390 ms and 440 ms for young and old participants, respectively) to congruent and incongruent stimuli.
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Figure 2: Voltage (A) and current source density (CSD; B) maps at the maximum peaks of P150/N170 (140 ms for young and old groups), N2 (260 ms for young group and 320 ms for old group), and P3b (390 ms and 440 ms for young and old participants, respectively) to congruent and incongruent stimuli.

Mentions: N2 showed a wider scalp distribution in older than in young participants (see Figure 2). The N2 peak amplitude was measured at Fz and Cz locations, as this wave was better defined in both age groups at these electrode sites, and the N2 peak latency was measured at Cz electrode site. At Pz and Oz electrodes sites, the N2 component was only identified in the older participants (see Figure 1). The N2 component was always identified as a negative voltage wave, which occurred prior to the P3b component, in the 200–350 ms post-stimulus interval. Once it was confirmed that P3b was reliably identified at all the midline electrode sites in the 360–600 ms post-stimulus interval, the P3b peak amplitude was measured at Fz, Cz and Pz, whereas peak latency was only measured at Cz electrode site.


Age-related effects on event-related brain potentials in a congruence/incongruence judgment color-word Stroop task.

Zurrón M, Lindín M, Galdo-Alvarez S, Díaz F - Front Aging Neurosci (2014)

Voltage (A) and current source density (CSD; B) maps at the maximum peaks of P150/N170 (140 ms for young and old groups), N2 (260 ms for young group and 320 ms for old group), and P3b (390 ms and 440 ms for young and old participants, respectively) to congruent and incongruent stimuli.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4060640&req=5

Figure 2: Voltage (A) and current source density (CSD; B) maps at the maximum peaks of P150/N170 (140 ms for young and old groups), N2 (260 ms for young group and 320 ms for old group), and P3b (390 ms and 440 ms for young and old participants, respectively) to congruent and incongruent stimuli.
Mentions: N2 showed a wider scalp distribution in older than in young participants (see Figure 2). The N2 peak amplitude was measured at Fz and Cz locations, as this wave was better defined in both age groups at these electrode sites, and the N2 peak latency was measured at Cz electrode site. At Pz and Oz electrodes sites, the N2 component was only identified in the older participants (see Figure 1). The N2 component was always identified as a negative voltage wave, which occurred prior to the P3b component, in the 200–350 ms post-stimulus interval. Once it was confirmed that P3b was reliably identified at all the midline electrode sites in the 360–600 ms post-stimulus interval, the P3b peak amplitude was measured at Fz, Cz and Pz, whereas peak latency was only measured at Cz electrode site.

Bottom Line: The Stroop effect occurred in both age groups, with longer reaction times in the older group than in the young group for both types of stimuli, but no difference in the number of errors made by either group.Furthermore, the P3b amplitude was maximal at frontal locations in older participants and at parietal locations in young participants.The age-related increase in perceptual resources and the posterior-to-anterior shift in older adults support adaptive reorganization of the neural networks involved in the processing of this Stroop-type task.

View Article: PubMed Central - PubMed

Affiliation: Department of Clinical Psychology and Psychobiology, University of Santiago de Compostela Santiago de Compostela, Spain.

ABSTRACT
We examined the event-related brain potentials elicited by color-word stimuli in a Stroop task in which healthy participants (young and old) had to judge whether the meaning and the color of the stimulus were congruent or incongruent. The Stroop effect occurred in both age groups, with longer reaction times in the older group than in the young group for both types of stimuli, but no difference in the number of errors made by either group. Although the N2 and P3b latencies were longer in the older than in the younger group, there were no differences between groups in the latencies of earlier event-related potential components, and therefore the age-related processing slowing is not generalized. The frontal P150 amplitude was larger, and the parietal P3b amplitude was smaller, in the older than in the younger group. Furthermore, the P3b amplitude was maximal at frontal locations in older participants and at parietal locations in young participants. The age-related increase in perceptual resources and the posterior-to-anterior shift in older adults support adaptive reorganization of the neural networks involved in the processing of this Stroop-type task.

No MeSH data available.


Related in: MedlinePlus