Fig. 6.

Differential patterns of fiber distribution within the sagittal stratum of the vervet monkey brain depending on origin. A Schematic depiction of routes of tracers after injection in areas DP (blue arrows), V4 (red arrows) and V4v (yellow arrows), according to Schmahmann & Pandya 2006 (their cases 18, 20, and 21, respectively, p. 275). Note the patterns of fibers from V4 entering the sagittal stratum in several bundles, in contrast to the locally focused entrance of fibers from DP and V4v. B 3D-PLI-derived FOM at a similar coronal sectioning plane as in A. White boxes show regions of interest analyzed in C–E. Color sphere indicates color coding of fiber orientations. C Enlarged, contrast-enhanced visualization of the fiber architecture within the middle part of the sagittal stratum. White arrows indicate the predominant direction of fibers coming from lateral occipital cortex, crossing through the ILF (single fibers colored in red), and entering the sagittal stratum in several small parallel bundles (red color in SSte). D Same enlarged view as in C, but as flashlight view of particular fibers of given direction within the section and inclination as indicated by the color coding within the panels. E Enlarged, contrast-enhanced depiction of two groups of fibers with different direction and entering pattern: the small parallel bundles (red color) from lateral occipital cortex (see also C) vs. the large bundle from caudal parietal cortex (blue color). F Enlarged, contrast-enhanced depiction of fibers from ventral occipital cortex crossing through the ILF and entering the latero-ventral tip of the sagittal stratum