The brain auditions different cells when learning a task, some don't make the cut

For decades, neuroscientists have wondered how the brain can continue to learn new skills without needing to grow in size or volume over a person’s lifetime. Evidence suggests that the number of brain cells — neurons, synapses, and glial cells — does initially increase as we’re learning, but many are eventually pruned away or assigned to other roles….

For decades, neuroscientists have wondered how the brain can continue to learn new skills without needing to grow in size or volume over a person’s lifetime. Evidence suggests that the number of brain cells — neurons, synapses, and glial cells — does initially increase as we’re learning, but many are eventually pruned away or assigned to other roles….