
The image shows that proteins are created at connections between brain cells when a long-term memory is formed. Neuroscientists had suspected as much, but hadn't been able to see it happening until now.
The experiment also revealed some surprising aspects of memory formation, which remains a somewhat mysterious process.
Kelsey Martin, a biochemist at the University of California, Los Angeles, and colleagues investigated memory formation in neurons from the sea slug Aplysia californica, a good model for brain cells in other organisms, including humans.