Inactivated Peripheral Fusiform Face Area

We tried to entirely inactivate the peripheral fusiform face area, see description of the aforementioned brain area in reference 1. We were able to achieve great inactivation to the aforementioned area by using red background for the rabbit-duck rivalrous stimulus. We think that this inactivation had occurred for two reasons; first, because red color is very silent, and therefore greater request of oxygenated hemoglobin by V4 area. Second, the low contrast of the stimulus (black drawing on red background) constricts the pupil size, therefore, lesser light rays will reach to retinal peripheries, and its corresponding neurons in the FFA.