In medical school, students learn of damage to Wernicke’s area. This is pathology, usually in the form of a stroke or tumor at the junction of the left temporal and parietal areas, or the top left thigh of the brain, if you will, if you can imagine the brain the shape of an intact grocery store chicken. This area gives us the ability to understand stimulus. Everything works to and from the left temporal and parietal junction in Wernicke’s except Wernicke’s. The image of say a car passes through the lens of the eye onto the retina. The light stimulates the optic nerve to fire electric currents down axons to neuronal bodies in the thalamus, which in turn relays signals to optic gyri in the visual cortex. A picture of car is registered and a message sent as a precise package to Wernicke’s. At Wernicke’s, the injured part unwraps the package and thinks a lot of things, just not car. Maybe instead a plane. A large girl. A piece of lint. A blue-red floral pattern. The individual speaks as volition remains, “ddurb dribdble aegiticakl boo ha he.” Or if s/he is semi-lucky with intact and fluent words, “this will pass Aunt may be coming some ton, ya?” It’s the coherency part that is in question.
You might think one could trick this dastardly brain part. How about instead of seeing an actual car, you instead say the word “car” or draw a car or mime a car or make the sound of a car-- Vroom vroom. But it turns out, language is language. Wernicke’s function is at the transition between symbolism and meaning. This can be direct or abstract. A sunset can be interpreted as a molten hot descending orange yellow orb. But it can also stand for the out of earth rotation of humanities main star; as the loss of the day; the transition of life energy; of natural wondrous blinding beauty. As a culture, we necessarily restrict interpretation of symbols to a long but finite list of possibilities lest we be at constant war with ourselves or others over significance. Our brains thus support a life-long Wernicke meaning construction operation, eventually able to define the language of sound, sight, feeling, touch and smell within particularized contexts. A baby observing a chair at first registers no understanding of how the chair is different from say, its father or the family dog. The baby possesses neither the language to distinguish world stimuli, nor the Wernicke bandwidth to store the lesson. In contrast, a six year old when shown the sun, doesn’t see the moon. A girl in a dress is not a boy. A rat is not a chicken. As one grows-up, being in agreement with the majorities’ Wernicke outputs makes you socially acceptable, and if nuanced but not too much so, popular.