“…Freud (1897), Collier (1924, Grunee (1936) and many others reject the birth injury theory. Patten and Matthews (1935), Stewart (1942), Ford (1944), andMcGovern andYannet (1947) consider that birth injury rarely causes symmetical spastic paralysis, although it may cause hemiplegia. Alpers and Marcovitz (1938), however, state that the post-mortem findings in a proportion of cases are compatible with a traumatic aetiology.…”