Botulinum toxin ? how a poison turned to a fascinating ally against an old adversary

Membro do Grupo de Disturbios doMovimento, Academia Brasileira deNeurologia, Sao Paulo SP, Brazil.Correspondence:Elizabeth M. A. BarasneviciusQuagliato; Av. Moraes Sales.1136 /conj 72; 13050-010 Campinas SP,Brasil; E-mail: bethbara@yahoo.comConflict of interest:There is no conflict of interest todeclare.Received 21 April 2014Accepted 09 May 2014