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Psychophysiological mechanisms underlying response selection in multidimensional space.

Mückschel M, Beste C - Sci Rep (2015)

Bottom Line: In such situations, a distributed fronto-parietal network mediates intensified conflict monitoring processes as well as response inhibition processes.Attentional selection processes were not affected.The study's findings are of relevance to our understanding to everyday functioning where response selection is usually carried out in two or three dimensions and not a single dimension as usually investigated in cognitive neuroscience.

View Article: PubMed Central - PubMed

Affiliation: Cognitive Neurophysiology, Department of Child and Adolescent Psychiatry, Faculty of Medicine of the TU Dresden, Germany.

ABSTRACT
In the outside world, response selection often requires the processing of information from different spatial dimensions. Yet, most neuroscientific approaches to the topic only employ variations in one dimension, namely the horizontal left-right axis. Hence, virtually nothing is known about the neuronal mechanisms underlying response selection in more than one dimension. We investigated this aspect with the help of a two-dimensional flanker task using EEG and source localization techniques. The data shows that response selection processes are differentially modulated across different dimensions. However, this modulation is restricted to conditions imposing increased demands on response selection. In such situations, a distributed fronto-parietal network mediates intensified conflict monitoring processes as well as response inhibition processes. In case response selection is carried out in the horizontal dimension, those brain areas are more active than during response selection in the vertical dimension. Attentional selection processes were not affected. The study's findings are of relevance to our understanding to everyday functioning where response selection is usually carried out in two or three dimensions and not a single dimension as usually investigated in cognitive neuroscience.

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Event-related current source densities depicting the P1 and N1 to flanker and target stimuli at electrodes P7 and P8 for the different experimental conditions.Black lines denote the compatible horizontal condition, brown lines denote the compatible vertical condition, green lines the incompatible horizontal condition, and red lines the incompatible vertical condition. The y-axis is given in μV/m2 and the x-axis shows the time in ms. The onsets of the flanker and target stimuli are indicated by arrows in the bottom part of the illustration. The baseline was set to immediately precede the presentation of the flanker stimulus (as illustrated by the black bar from −300 to −200 ms prior to target onset/time point 0). The scalp topography plots show the topographical distribution of the P1 and N1 components in incompatible trials.
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f1: Event-related current source densities depicting the P1 and N1 to flanker and target stimuli at electrodes P7 and P8 for the different experimental conditions.Black lines denote the compatible horizontal condition, brown lines denote the compatible vertical condition, green lines the incompatible horizontal condition, and red lines the incompatible vertical condition. The y-axis is given in μV/m2 and the x-axis shows the time in ms. The onsets of the flanker and target stimuli are indicated by arrows in the bottom part of the illustration. The baseline was set to immediately precede the presentation of the flanker stimulus (as illustrated by the black bar from −300 to −200 ms prior to target onset/time point 0). The scalp topography plots show the topographical distribution of the P1 and N1 components in incompatible trials.

Mentions: For the main experiment EEG data was collected. The P1 and N1 components reflecting attentional processing1819 evoked by the flanker and target stimuli are shown in Figure 1. The electrodes used for the statistical analysis of experimental effects reflect the maximum activity, which was statistically validated as outlined in the methods section.


Psychophysiological mechanisms underlying response selection in multidimensional space.

Mückschel M, Beste C - Sci Rep (2015)

Event-related current source densities depicting the P1 and N1 to flanker and target stimuli at electrodes P7 and P8 for the different experimental conditions.Black lines denote the compatible horizontal condition, brown lines denote the compatible vertical condition, green lines the incompatible horizontal condition, and red lines the incompatible vertical condition. The y-axis is given in μV/m2 and the x-axis shows the time in ms. The onsets of the flanker and target stimuli are indicated by arrows in the bottom part of the illustration. The baseline was set to immediately precede the presentation of the flanker stimulus (as illustrated by the black bar from −300 to −200 ms prior to target onset/time point 0). The scalp topography plots show the topographical distribution of the P1 and N1 components in incompatible trials.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4291563&req=5

f1: Event-related current source densities depicting the P1 and N1 to flanker and target stimuli at electrodes P7 and P8 for the different experimental conditions.Black lines denote the compatible horizontal condition, brown lines denote the compatible vertical condition, green lines the incompatible horizontal condition, and red lines the incompatible vertical condition. The y-axis is given in μV/m2 and the x-axis shows the time in ms. The onsets of the flanker and target stimuli are indicated by arrows in the bottom part of the illustration. The baseline was set to immediately precede the presentation of the flanker stimulus (as illustrated by the black bar from −300 to −200 ms prior to target onset/time point 0). The scalp topography plots show the topographical distribution of the P1 and N1 components in incompatible trials.
Mentions: For the main experiment EEG data was collected. The P1 and N1 components reflecting attentional processing1819 evoked by the flanker and target stimuli are shown in Figure 1. The electrodes used for the statistical analysis of experimental effects reflect the maximum activity, which was statistically validated as outlined in the methods section.

Bottom Line: In such situations, a distributed fronto-parietal network mediates intensified conflict monitoring processes as well as response inhibition processes.Attentional selection processes were not affected.The study's findings are of relevance to our understanding to everyday functioning where response selection is usually carried out in two or three dimensions and not a single dimension as usually investigated in cognitive neuroscience.

View Article: PubMed Central - PubMed

Affiliation: Cognitive Neurophysiology, Department of Child and Adolescent Psychiatry, Faculty of Medicine of the TU Dresden, Germany.

ABSTRACT
In the outside world, response selection often requires the processing of information from different spatial dimensions. Yet, most neuroscientific approaches to the topic only employ variations in one dimension, namely the horizontal left-right axis. Hence, virtually nothing is known about the neuronal mechanisms underlying response selection in more than one dimension. We investigated this aspect with the help of a two-dimensional flanker task using EEG and source localization techniques. The data shows that response selection processes are differentially modulated across different dimensions. However, this modulation is restricted to conditions imposing increased demands on response selection. In such situations, a distributed fronto-parietal network mediates intensified conflict monitoring processes as well as response inhibition processes. In case response selection is carried out in the horizontal dimension, those brain areas are more active than during response selection in the vertical dimension. Attentional selection processes were not affected. The study's findings are of relevance to our understanding to everyday functioning where response selection is usually carried out in two or three dimensions and not a single dimension as usually investigated in cognitive neuroscience.

Show MeSH