Great overlap between the arcuate fasciculus (AF) and the superior longitudinal fasciculus (SLF) II

[yutinghe99]

Dear experts,

After fixel-based analysis, I used TractSeg on my population template and tried to assign significant fixels according to the segmentation. However, I found that the AF_right greatly overlays with the SLF_II_right, and the significant fixels showed in their overlapping area. Below is the screenshot of my results, the AF_right is hot, the SLF_II_right is blue, and the green lines in them are the significant fixels (colored by directions).

I would like to know if the segmentation of the AF_right and the SLF_II_right is biologically appropriate. If it's biologically appropriate, how should I interpret the fixel results, and how should I describe the location of these fixels? within the AF_right or the SLF_II_right?

Thank you in advance for any insights.

Note: the population template is in the MNI space.

Best regards, Yuting