Inhibition of the NMDA receptor/Nitric Oxide pathway in the dorsolateral periaqueductal gray causes anxiolytic-like effects in rats submitted to the Vogel conflict test - Tonetto, Lucas L. M.; Terzian, Ana L.; Guimarães, Elaine Aparecida Del Bel Belluz; Guimarães, Francisco Silveira; Resstel, Leonardo Barbosa Moraes (Behavioral and Brain Functions, 2009)