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A sleeping man remains completely unaware as a gecko crawls onto his nose. This is a fascinating example of sensory gating, where the brain filters out harmless stimuli during deep sleep to protect the sleep cycle.

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00:00deep sleep test. He was truly in a deep sleep, breathing regularly, not moving at all. A gecko
00:06was placed near his nostrils. He didn't flinch. This is sensory filtering at work. During deep
00:12sleep, the brain filters out non-threatening stimuli to protect the rest cycle. Light touches,
00:17small temperature changes, even nose contact can be ignored if the nervous system doesn't detect
00:21danger. Would you wake up immediately or remain in a deep sleep? Let me know below. Follow along
00:27for a brief explanation of human behavior, the science of sleep, and the psychology of everyone
00:31mentions.
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