© ShutterstockThe process of being born may activate sensory maps in the brain.
The mere act of being born triggers development of the brain's sensory system, new research shows.
In a mouse study, the birthing process caused levels of a brain chemical called serotonin to drop, triggering the formation of the brain's sensory maps that organize input from vision, touch and other senses. The findings could help scientists understand healthy
human brain development and mental illness, the researchers say.
"Our results clearly demonstrate that birth has active roles in brain formation and maturation," study leader Hiroshi Kawasaki of Kanazawa University in Japan said in a statement.
The brains of humans, mice and other mammals are equipped with maps for processing different types of sensory information. For example, the barrel cortex in rodents represents tactile information from the whiskers, and the layout of the neurons in that map mirrors the layout of whiskers on the animal's face.
Previously, researchers found that the brain chemical serotonin, the target of many depression medications, also plays a role in the development of sensory maps. But serotonin's exact involvement was not well understood.