Fig. 3.

The relationship between PMA at scan and fibre density and cross-section (FDC). Fixels with a significant positive correlation (corrected p < 0.05) are shown on the top row, and streamlines passing through significant fixels (coloured by direction red: left-right; green: anterior-posterior; blue: inferior-superior) are shown on the bottom row, in the axial plane. The scatter plot shows the correlation between PMA and FDC averaged over all significant fixels. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)