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In page Cerebral achromatopsia:

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The color stimulus presented is not the only factor in determining the involvement of the ventral occipital cortex in color processing.[3] The amount of attention and the type of object also affect the activation of the ventral occipital cortex. It has been noted that this area of the occipital lobe may not be a processing center but rather a pathway that is a critical intersection of several cortical areas involved in color perception.[citation needed]