ABSTRACT
Echopraxia and echolalia are subsets of imitative behavior. They are essential developmental elements in social learning. Their persistence or reemergence after a certain age, though, can be a sign of underlying brain dysfunction. Although echophenomena have been acknowledged as a typical sign in Gilles de la Tourette syndrome (GTS) since its first description, their clinical significance and neural correlates are largely unknown. Here, we review the course of their scientific historical development and focus on their clinical phenomenology and differential diagnosis with a particular view to GTS. The neural basis of echophenomena will also be addressed. © 2012 Movement Disorder Society.
Subject(s)
Echolalia/diagnosis , Echolalia/etiology , Tourette Syndrome/complications , Diagnosis, Differential , Echolalia/history , History, 19th Century , Humans , Neuroimaging , Tourette Syndrome/historySubject(s)
Echolalia/history , Neurology/history , Tourette Syndrome/history , France , History, 19th Century , HumansABSTRACT
The "Jumping Frenchmen of Maine" were described by George Beard in 1878. They had an excessive startle response, sometimes with echolalia, echopraxia, or forced obedience. In 1885, Gilles de la Tourette concluded that "jumping" was similar to the syndrome that now bears his name. Direct observations of jumpers have been scarce. We studied eight jumpers from the Because region of Quebec. In our opinion, this phenomenon is not a neurologic disease, but can be explained in psychological terms as operant conditioned behavior. Our cases were related to specific conditions in lumber camps in the 19th and the beginning of the 20th century.
