oscar is driving to school and feels an itch on his leg. he realizes there is a spider crawling up it. he stops the car, feeling panicky. given what is known about the pathways for sensory information of a threatening nature, it is likely that the moment he saw the spider, information was first routed through the thamalus
Based on studies conducted by various neurologists, it can be said that in this situation that information was most likely first routed to the thamalus. This is a part of the brain that relays motor and sensory information to the cerebral cortex. It is also responsible for regulating sleep, consciousness and even alertness. Which is what was triggered (alertness) when you saw the spider crawling up your leg.
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