First-of-its-kind map of the mouse nose reveals surprises about the sense of smell
Scientists have created the first comprehensive map of smell receptors in the mouse nose, revealing that these receptors are organized into precise, banded patterns rather than being randomly distributed. The spatial organization aligns with corresponding regions in the brain's olfactory bulb, suggesting a coordinated sensory map. The study identifies retinoic acid as a key molecule guiding receptor placement. These findings challenge previous assumptions about how the sense of smell is structured and may inform research on human olfaction and smell-related disorders.
- ▪The map shows over 1,100 types of smell receptors organized into tightly structured bands in the mouse nasal cavity.
- ▪Each type of olfactory receptor neuron connects to a specific, consistent location in the brain’s olfactory bulb, aligning nose and brain maps.
- ▪Retinoic acid was identified as a molecule that helps determine where specific receptors are expressed in the nose.
- ▪The spatial arrangement of receptors was nearly identical across all mice studied, indicating a highly conserved organizational pattern.
- ▪The findings may help researchers understand human smell and develop treatments for smell loss and associated conditions like depression.
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Health Neuroscience First-of-its-kind map of the mouse nose reveals surprises about the sense of smell News By Payal Dhar published 28 April 2026 A new map shows how smell receptors in the mouse nose are precisely organized into tight bands based on type. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. This microscope photo of a cross section of a mouse nose shows scent-sensing neurons in green, as well as dying neurons in red.
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