Relating to the calcarine sulcus, a groove on the inner surface of the brain's occipital lobe involved in vision.
From Latin 'calcar' (spur), because this brain groove resembles a spur in shape. First used by anatomists in the 19th century to describe this prominent brain feature.
The calcarine sulcus is where your brain first becomes aware of what you're seeing—this tiny spur-shaped groove in the back of your brain is the gateway to all visual experience!
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