Insight by Health and Wellness
Clock‑setting melanopsin ganglion cells concentrate in the lower retina and therefore view the upper visual field, so bright overhead lights strongly stimulate the clock while low, dim lighting minimizes evening circadian activation.
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Short-term sensory traces move to the hippocampus, which strengthens neurons through neuroplasticity—forming new synaptic buds that stabilize information into long-term cortical networks.