Target-dependent routing of sensory information in the olfactory system.

Projection target-dependent differences in odor coding are observed in mouse olfactory bulb neurons, with APC-projecting neurons coding more strongly for odor concentration.

• Why it matters: Understanding how sensory information is routed in the olfactory system is crucial for deciphering sensory perception mechanisms, yet whether different output neurons convey distinct information remains unclear.
• What they did: Using retrograde tracing and in vivo 2-photon calcium imaging, the study separated mouse olfactory bulb neurons by projection area and analyzed their odor responses, focusing on cell type and projection target.
• The result: Findings show a prominent projection-defined separation of sensory information, with projection target outperforming cell type in classifying odor features, suggesting specialized routing in the olfactory system.