Pelizaeus–Merzbacher disease

Pelizaeus, Friedrich (1850–1917), and Merzbacher, Ludwig (1875–1942), German neurologists. In 1885 Pelizaeus described a congenital and familial disease that is due to atrophy of the white matter of the brain and whose characteristics include speech disturbances, loss of coordination, and mental retardation. Merzbacher independently described the same disease in 1908.