The Role of the Brain

There would be no seeing without the brain. Indeed, sudden damage to the brain's visual cortex takes out not only sight itself but also the awareness that sight is now gone. I can't improve on this summary of the brain's overarching role in human vision:
In general, during daytime activity, the flow of information in the brain passes from the senses into primary input areas of the cortex, through secondary areas, into the limbic system at the base of the brain. In these limbic areas, it is believed that the information is finally interpreted in terms of its emotional impact and its implications for survival. From there, plans are formulated and elaborated in conjunction with the frontal ... cortex, and finally actions are implemented through the motor cortex.
Source: Regena Technology: Inspired by the architecture of the human brain.
Spatial and Interpretive Pathways
Charged with keeping its host reproducing and therefore mobile, well-fed, and out of trouble, the brain organizes eye outputs into visual experiences by working the visual scene along two largely separate pathways:
a spatial pathway dedicated to localizing objects and tracking their movements
an interpretive pathway dedicated to identifying objects and attaching significance to them
The spatial pathway directs the motor system in its physical interactions with the external world via a 3D world model constructed with inputs from all the senses. The interpretive pathway taps areas of the brain involved with emotion, memory, language and communication to arrive at what to do about what the eyes have reported and how to go about it.
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