The patient was a young pianist named Aria. After a mild seizure, Aria could no longer recognize her own mother's face, though she could identify a C-sharp minor chord from three rooms away. Standard MRI showed nothing. Elena needed the Catani Atlas —a legendary, color-coded map of white matter tracts that revealed the brain’s hidden highways. The problem? The physical book cost more than her monthly rent, and the hospital library’s copy had been "permanently borrowed" by a senior neurosurgeon five years ago.

Follow this 90-second plan:

A primary feature of the atlas is its (axial, coronal, and sagittal). Key Features of the Atlas