FIGURE 2.

Nonlinear embedding of fMRI time series data. (a) 2sDM embedding of seven tasks (relational, social, motor, gambling, emotion, working memory 2‐back, and working memory 0‐back) from the HCP dataset. Four different views of the manifold are shown. Each point in these subplots represents a single time point and is colored by the task type. (b) Averaged temporal trajectory of each task with the embedding colored by the corresponding brain state as the background. (c) WM task's 0‐back and 2‐back task blocks visualized separately with major cues and fixations points annotated. Arrows show the progression direction of the trajectory. Trajectory in (b) and (c) uses the same colormap as (a). fMRI, functional magnetic resonance imaging; HCP, Human Connectome Project; 2sDM, 2‐step Diffusion Maps