Figure 1. Changing proportion of article titles using the possessive form of selected eponymous neurodegenerative diseases.

LOESS localised regression curves showing the time-varying proportion of paper titles containing the possessive forms of five neurodegenerative disorders, compared to Down syndrome. The possessive form remains dominant in Parkinson’s, Alzheimer’s, and Huntington’s, whereas it is becoming extinct in Gaucher disease. Wilson’s disease shows an intermediate pattern of slow decline.