1. DCBS-Physiology, Federal University of Health Sciences; Porto Alegre, Rio Grande do Sul 90050-110 Brazil
2. ICBS-Anatomy, Federal University of Rio Grande do Sul; Porto Alegre, Rio Grande do Sul 90050-110 Brazil
3. Instituto Cajal, Consejo Superior de Investigaciones Científicas (CSIC); 28002 Madrid Spain
4. Graduation Program in Neurosciences, Federal University of Rio Grande do Sul; Porto Alegre, Rio Grande do Sul 90050-110 Brazil