Top Perception Flashcards

Perception is a bit of a scientific mystery. While we know a lot about individual senses and how brains interpret them, nobody knows for sure how all those individual senses get combined to produce consciousness. Regardless of which sense you’re looking at, they all work in roughly the same way. First, some kind of signal has to come in from the outside world: for hearing it’s a physical wave in the air, for sight it’s a beam of light, for taste it’s the molecules in your food.

Those signals stimulate activity in sensory cells in your ears, eyes, tongue, or wherever. Once those cells fire, the signal gets carried back to your central nervous system (the brain in most cases), where it gets processed and combined with other signals. Those might produce immediate reactions, emotional changes, memories, or any combination of mental results. To make matters even more complicated, these changes themselves might produce new sensory signals. For example, seeing a lion snarl might make you afraid, which would make your hair stand on end – a physical sensation that would go back to your brain once again as a new sensory input. 
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