1. Department of PhysiologyInstitute of Basic Health Sciences, Universidade Federal do Rio Grande do SulPorto AlegreRSBrazil
2. Neurophysiology and Neurochemistry of Neuronal Excitability and Synaptic Plasticity LaboratoryDepartment of BiochemistryInstitute of Basic Health Sciences, Universidade Federal do Rio Grande do SulPorto AlegreRSBrazil