Alternatively, competition for frontal "workspace" might be stronger than in parietal cortex [13], correlating to stronger modulation of frontal activity as compared to parietal activation.
Alternatively, processes related to cognitive control computed in frontal regions could resolve competition among active representation [31], or suppress proactive interference [32], [33].
According to this hypothesis feedback signal, mainly from frontal cortex, biases the competition between relevant and irrelevant items in favour of the task relevant items [7] [9].
In our model this difference is due to the fact that, when the frontal bias is ineffective, competition in the parietal module is not biased by novelty and attention is guided purely by the output of competition in the model's ventral stream, which is driven by bottom-up stimulus factors combined with the top-down attention modulation related to the task (search target object).
The larger the initial cohort, the greater the activation in these frontal regions, reflecting increased competition.
The additional stressor of a nonverbal fluency measure would provide competition for these frontal resources, resulting in increased right frontal activation.
The addition of a verbal fluency stressor would provide further competition for left frontal resources, causing significant activation of the left frontal area.
Although there may be competition for right frontal resources by the design fluency task and cardiovascular control, the left frontal region is not activated (as the task is not stressful to this group, there is no activation of this region) and can balance the heightened activity of the right frontal region, allowing for greater control of cardiovascular functions.
Wittmann, M. K. et al. Self-other mergence in the frontal cortex during cooperation and competition.
Flow visualization and measurements of the attenuation and failure processes for three typical unstable mixtures (oxy-acetylene, oxy-methane, and oxy-propane mixtures), characterized by their highly irregular frontal structure, revealed the ongoing competition between transverse wave elimination at the porous wall and re-amplification of triple points within the reaction zone.
This right frontal activation is in direct competition for the right frontal resources, which have been demonstrated to be responsible for inhibition of right parietal and temporal regions.
