Exposure to CO2 after traumatic experience strengthens fearful memories in mice
Frontiers
NOVEMBER 7, 2021
By Mischa Dijkstra, Frontiers science writer. Image credit: By Stefan_Sutka / Shutterstock.com. Mice who inhale CO2 within hours after forming a new fearful memory show more distress when subsequently prompted to retrieve the memory. This memory-strengthening effect of CO2 requires a functional ASIC1A gene in the mouse brain. The effect is time-dependent, unique to CO2, and specific to only certain types of memories, such as fearful sound cues or environmental contexts.
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