gonda's sign gonda's sign gonda's sign is a clinical sign in which flexing and then suddenly releasing the fourth toe elicits an extensor plantar reflex. it is found in patients with pyramidal tract lesions, and is one of a number of babinski-like responses.it is named after the ukrainian neuropsychiatrist viktor gonda (1889–1959), who discovered it sometime in the mid-1930s while he was practicing in the united states. gonda was one of the strong proponents of electrotherapy to cure psychiatric illnesses. gonda's signdifferential diagnosispyramidal tract lesions