The Occipital Lobe!
Although the temporal lobes are located in a logical area (surrounding the ears) the occipital lobes, which process visual data incoming from the eyes, are located at the very back of the brain. All visual processing, including reading, must pass through this area, although humans do not have a dedicated ‘reading’ area. (wow, right?)

Reading is a complex and unnatural "culturally enforced" skill that involves the occipital lobe for visual decoding, Wernicke’s area in the temporal lobe for comprehension, and the PFC for general synthesis, among many, many other areas of the brain.

Damage to the occipital lobe may cause reading impairment or even complete loss of vision. See how our vision overlaps and crosses over (click, and see below).

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