A Functional Cartography of Cognitive Systems
Fig 3
Cognitive Systems Are Differently Recruited and Integrated Across the Task Battery.
(A) The module allegiance matrix at the system level represents how regions from large-scale systems are engaged in the dynamic functional brain network during the task battery. Each cell in this matrix is simply the average of the cells within a system, and corresponds to how recruited, on average, are the nodes within a system, and how integrated, on average, are nodes between two given systems. (B) Graph representing the recruitment and integration coefficients of each system. The size of each node represents the recruitment of each system, while the edge thickness represents the integration between a pair of systems. Red edges are significantly stronger than the mean edge weight, and blue edges are significantly weaker than the mean edge weight (p < 0.05). (C) Recruitment and integration coefficients. Shaded areas correspond to the range of values expected by a null model, where each brain region is reassigned to a cognitive system uniformly at random. Error bars indicate the standard error of the mean across subjects. (D) Functional cartography of cognitive systems. Each system is represented in a position defined by its average recruitment and integration coefficients. Shaded areas—defined by a null model as in panel (C)—define the significant regions of the parameter space. A specific role is assigned to each of the nine regions of the parameter space, as in Fig 1D. Abbreviations: VA: Ventral Attention; DA: Dorsal Attention; Sa: Salience; FP: Fronto-Parietal; CO: Cingulo-Opercular; Au: Auditory; SH: Somatomotor Hand; SF: Somatomotor Face; MR: Memory Retrieval; Vi: Visual; Sc: Subcortical; Ce: Cerebellar; DM: Default-Mode; O: Other.