Before deciding on the academic career, Dr. Peixoto worked at the Krasnow Institute for Advanced Study, focusing on epilepsy control with low frequency electric fields. She has also developed microfabricated oxygen sensors to profile metabolic activity in cardiac cells while at Stanford University. During her PhD at USP (Brazil) she designed microelectrode arrays and investigated snail neuronal cultures. As part of Dr. Peixoto PhD project, she spent almost two years in Germany (in Bonn) as a researcher with the German retina implant project. During her Masters (at Unicamp, Brazil) she looked at the spreading depression phenomenon in the chicken retina, which is an experimental model for migraines.