How the brain regulates learning on a cellular level: 3D maps reveal synapses reorganizing in real time

Inside the brain is a dense network of neurons that receive, process, and relay information.

The synapse, where neurons meet, is the epicenter of this communication.

Neurons that send information, called presynaptic neurons, hold tiny packages of neurotransmitters—waiting for a chemical signal from the brain to be released.

How this system is regulated by the brain during periods of learning has, until now, been out of reach. ...