Prior electrical stimulation of dorsal periaqueductal grey matter or deep layers of the superior colliculus sensitizes rats to anxiety-like behaviors in the elevated T-maze test - Almeida, Leandro Pinto de; Ramos, Patrício Lemos; Pandossio, José Eduardo; Landeira-Fernandez, Jesus; Zangrossi Júnior, Hélio; Nogueira, Regina Lúcia (Behavioural Brain Research, 2006)