visual field suppress each other when presented together, but not when each stimulus is presented alone. Kastner and colleagues also found that directing attention to the specific location of a stimulus reduces the suppressive effect. Increased activity in the visual cortex was also observed; this was the result of Top-down biasing due to the favoring of the attended location. Further Evidence Another supposition of Biased Competition Theory, that competition is integrated across multiple systems in the brain (for example, the visual system as well as working memory), is least studied. However, empirical evidence has been undertaken to confirm the authenticity of this claim. Studies have shown this integration of differing brain systems by undertaking neuroimaging research. Activation in the middle temporal area, as well as the fusiform face area was seen when subjects were asked to attend to a moving face. The middle temporal area is involved in the perception of motion, while the fusiform face area is involved in facial recognition, showing the integrated systems of the brain in Biased Competition Theory. Ferrera and Lisberger provided evidence for competitive interactions in the selection of targets for smooth pursuit eye movements. References Neurophysiology Perception Visual system