Figure 1.

Axial proton-density images of an injured mouse spinal cord. The serial images show normal caudal and rostral sections and injury epicenter on postinjury day 1. Arrows point to corticospinal tract (CST). In normal cord, the image intensity profile does not produce enough contrast to distinguish the CST from the surrounding white matter. Interestingly, in this injured SC, the CST at the rostral section, but not the caudal section, has been delineated by slight hyperintensity compared to the background white matter.