Neurons that process stimuli from the same eye form clusters in the mouse visual cortex

For more than 50 years, it has been known that in the cerebral cortex of many mammals, neurons with the same function are grouped into columns. Now, for the first time, researchers at the Max Planck Institute for Biological Intelligence have been able to demonstrate these structures in the visual cortex of mice: Here, neurons that process stimuli from the same eye form clusters.

Air lead exposure linked to increased infant mortality risk

Concentrations of lead in the air remain substantial in developed and developing countries, largely the result of industrial emissions. Even with the decline in lead in gasoline, developed countries, including the United States, still have substantial air lead emissions, and as a partial result, blood lead levels in children are high worldwide. In a new study, researchers used data on lead emissions in the air to estimate the effects of air lead concentration on infant mortality. The study found a statistically significant relationship between air lead concentration and infant mortality.