Small-world network metrics of functional brain networks at two different parcellation scales.

<p>The graphs show the changes in <i>γ</i> (solid line) and <i>λ</i> (dashed line) in the functional brain networks of AD (red), aMCI (green), and NC (blue) groups at (A) low parcellation scale and (B) high parcellation scale with respect to sparsity. For all the three groups, <i>γ</i> was significantly greater than 1 and <i>λ</i> was relatively close to 1, indicating prominent small-world properties for all groups.