The abstract is read at the publisher; the summary is JClub's.
In Mus musculus, attraction to trimethylamine (TMA) is learned rather than innate, requiring developmental TMA exposure and engaging specific olfactory and amygdala circuits.
- Why it matters: Behavioral evolution is often linked to innate wiring, but this work tests whether a species-specific odor response can instead arise from experience-dependent learning.
- What they did: The study mapped whole-brain immediate-early gene activation after TMA exposure and used activity-dependent TRAP2 labeling to identify TMA-responsive anterior olfactory nucleus neurons; it also tested Mus caroli aversion circuitry.
- The result: TMA-responsive anterior olfactory nucleus neurons are necessary and sufficient for attraction in Mus musculus, while Mus caroli innate aversion depends on excitatory neurons in the posterior cortical amygdala.
The findingWhy it mattersWhat they didThe result
AI summary of the abstract · may contain errors · not medical advice · read the paper.