Figure 2.

Number of studies per imaging technique. Number of studies (Y-axis) per imaging technique (X-axis). Functional MRI has the highest number of experiments with positive results (i.e., studies which found an association between neuroimaging features and post-concussive symptoms). Darker colors show the number of studies with positive results, while lighter colors show the studies without significant findings. The number above each bar represent the percentage of studies with positive results.