Mini-simposium 4: The critical role of the prefrontal and frontal cortex Module 1 Pesquisa de Opinião Unit 1 Pesquisa de Opinião Admin Mini-simposium 3: A novel and non-invasive method to modulate the inflamatory system and brain plasticity: transcutaneous vagal nerve stimulation Mini-symposium 5: Basic principles and safety of transcranial direct current stimulation