PMC3031136_01
Anatomical MRI images of NL's brain. The left side is a rendered image of NL's left hemisphere, and the right side shows axial slices in neurological convention with the left hemisphere on the left side.
nihms254047f1.jpg
PMC3031136_01_nihms254047f1.jpg
F1
Figure 1 shows anatomical MRI images (axial slices) of NL's brain.
a. Region of interest (ROI) used to define Heschl's convolutions in NL's right superior temporal gyrus. b. DTI pathways passing through the ROI shown in a. Images are shown in neurological convention with the left hemisphere on the left.
nihms254047f2.jpg
PMC3031136_01_nihms254047f2.jpg
F2
Figure 2a shows the ROI used to define Heschl's convolutions in the superior temporal gyrus and Figure 2b shows DTI pathways passing through this ROI, which were calculated using custom written Matlab software based on the open source DTI Query.pdb file format (Matlab functions available at http://openwetware.org/wiki/Beauchamp:DetermineTract). As can be seen in Figure 2, NL's cross callosal projections are relatively robust, and pass through the posterior portion of the corpus callosum, which is likely to be the relevant pathway for speech perception. As is evident in Figure 2b, these cross-callosal fiber tracts terminate in perilesional regions.