According to researchers at the Washington University School of Medicine in St. Louis, a female mouse has a steroid known as glucocorticoids (GCCs) in urine. These compounds are meant to activate nerve cells in nose of the male mouse with extraordinary effectiveness.

These steroids are believed to affect energy metabolism, stress and immune function, as remarked by senior author Timothy E. Holy, Ph.D., assistant professor of neurobiology and anatomy. By just sniffing physiology and theoretically, a mouse can get detailed insider’s view of the health of the animal they came from. Studies also showed that female mice or their odors caused male mice to sing.

From science daily:

The new study, led by graduate student Francesco Nodari, identified compounds that are unusually potent stimulators of the mouse nose. The pheromones activate nerve cells 30 times as often as all the other pheromones previously identified in female mouse urine combined. In addition, several of the new signals activate specific nerve cells. This may mean the male mouse‘s brain can assess different aspects of female mouse health by selectively analyzing individual pheromones.

We all aware of the fact that urine, sweat, and other bodily fluids contain chemical communication signals called pheromones that can trigger this kind of a behavior. A male mouse can identify the different aspects of female mouse’s health by individual pheromones. These signals might be helpful in gaining the information for social purposes, such as establishing territory, or dominance, or in courtship and mating. A male mouse has an ability to distinguish these pheromones with the help of an extensive olfactory system.

A male mouse has an ability to recognize 75% of female mouse pheromones as shown by the studies.

Tags: glucocorticoids, neurobiology, pheromones, physiology

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