‘Shell Shock’—The 100-Year Mystery May Now Be Solved
National Geographic

Blast Shock Revealed: These two postage-stamp-size sections of the cerebral cortex were stained to highlight the protein marker of brain damage. The brain tissue at left (gray coloring) is normal. But the section at right (red coloring), from a service member exposed to multiple high-explosive detonations, shows the distinctive and previously undescribed pattern of scarring. (Brain scans courtesy Daniel Perl)