Brain Activity Linked to Stress Changes Chemical Codes

Brain Activity Linked to Stress Changes Chemical Codes

Five years ago, a team of University of California San Diego neurobiologists published surprising findings describing how rats' brain cells adopted new chemical codes when subjected to significant changes in natural light exposure -- much as humans suffer from "winter blues," the type of depression known as seasonal affective disorder . A new study implicates a role for light-induced electrical activity in controlling chemical codes. In the earlier studies, the researchers showed for the first time that rats' nerve cells switched to a new chemical code when the animals were subjected to large shifts in their day...

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