Fig. 1.

Definitions, hypotheses and study setup, A: Illustration of high and low redundancy networks under disruption, B: Different trajectories of hypothesized variation of functional network redundancy over the human lifespan, Hypothesis 1 follows the pattern of accumulation and later-age decline, Hypothesis 2 suggests early development followed by slow decline, Hypothesis 3 takes the course of accrual similar to 1, but does not lead to old-age decline, C: Schematic showing the hypothesized framework for age-cognition-redundancy relationship. We hypothesize that the established association between age and cognition (indicated by arrow), will be mediated by redundancy (dashed arrows) operating as a mechanism of reserve in this context, D: Age distribution of the participants in the study.