Resting-State fMRI Whole Brain Network Function Plasticity Analysis in Attention Deficit Hyperactivity Disorder
Table 2
Mathematical definitions of complex network measures.
Measure
Formula
Definitions
Node degree
The greater the node degree, the more nodes connected to it, indicating that the position of the node in the network is more important
Clustering coefficient
The clustering coefficient of nodes reflects the degree of network collectivization, which measures the relationship between nodes and their neighbors
Shortest path length
The shortest path length describes the optimal path between any two nodes in the network
Betweenness centrality
Betweenness centrality is defined as the number of times that the shortest path between any two nodes in the network passes through the node
Global efficiency
Global efficiency measures the global transmission capacity of the network
Local efficiency
Local efficiency is expressed as the average of the global efficiency of all nodes in the network
Modularity
Modularity, also known as community, is defined as a collection of nodes in the network that are tightly connected inside but sparsely connected outside
Small-world network
Small-world networks have shorter shortest path lengths and higher clustering coefficients. When , it means that the network has small-world properties
