Complex sentence: The majority of cells in the inferior temporal cortex and the superior temporal sulcus of monkeys trained to report their percept during flash suppression follow the animal's percept: when the cell's preferred stimulus is perceived, the cell responds.
Split into simpler sentences: The majority of cells in IT cortex and in the superior temporal sulcus of monkeys trained to report their percept during flash suppression follow the animal's percept. That is, when the cell's preferred stimulus is perceived, the cell responds.