What’s the science behind someone being a “light sleeper”?
In: Biology
I researched this once and I believe a contributing factor is how active an individual’s thalamus is. The thalamus is the part of the brain responsible for relaying sensory signals and regulating sleep/consciousness/alertness. Individuals with a highly active thalamus may allow sensory input during sleep to get “lost in the noise” so that they are less likely to be disrupted. Those with a less active thalamus may therefore be able to pay more attention to the same stimuli and thus have a greater chance of disrupting sleep.
Edit: spelling
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