Structurally-Constrained Relationships between Cognitive States in the Human Brain
Figure 2
State-space mapping of structure-function relationships.
Density of between-network couplings () versus within-network couplings (
) are shown as a function of the increasing functional threshold
in the representative brain network for the resting (circular markers), attention (square markers), and memory (triangular markers) states. Comparison of these network couplings reveals a large degree of separation between rest, attention, and memory states, with the degree of separation increasing as a function of
. The resting state is characterized by an increased density of
relative to
connections and a decreased density of
contributions. In comparison, the attention state is characterized by an increased density of
relative to
connections. The memory state shares features of both the resting and attention states, showing an increased density of
relative to
connections and an increased density of
connections.