And they leap so looply, looply, as they link to light.

Finnegans Wake 226

Symbols (and even natural or non-symbolic dicisigns as self-representing signs) are the semiotic equivalent, or mental manifestation, of the brain processes that appear as consciousness. This self-representation is a feedforward-feedback cycle like the meaning cycle. Thomas Metzinger explains:

In conscious visual processing, for example, high-level information is dynamically mapped back to low-level information, but it all refers to the same retinal image. Each time your eyes land on a scene (remember, your eye makes about three saccades per second), there is a feedforward-feedback cycle about the current image, and that cycle gives you the detailed conscious percept of that scene. You continuously make conscious snapshots of the world via these feedforward-feedback cycles. In a more general sense, the principle is that the almost continuous feedback-loops from higher to lower areas create an ongoing cycle, a circular nested flow of information, in which what happened a few milliseconds ago is dynamically mapped back to what is coming in right now. In this way, the immediate past continuously creates a context for the present— it filters what can be experienced right now. We see how an old philosophical idea is refined and spelled out by modern neuroscience on the nuts-and-bolts level. A standing context-loop is created. And this may be a deeper insight into the essence of the world-creating function of conscious experience: Conscious information seems to be integrated and unified precisely because the underlying physical process is mapped back onto itself and becomes its own context. If we apply this idea not to single representations, such as the visual experience of an apple in your hand, but to the brain’s unified portrait of the world as a whole, then the dynamic flow of conscious experience appears as the result of a continuous large-scale application of the brain’s prior knowledge to the current situation. If you are conscious, the overall process of perceiving, learning, and living creates a context for itself— and that is how your reality turns into a lived reality.

— Metzinger 2009, 31-32

Leave a Reply

Your email address will not be published.

This site uses Akismet to reduce spam. Learn how your comment data is processed.