Bread that's just come from the oven is warm, soft and pliable. It tastes good but has a limited shelf life. As the bread gets old it gets stale,it looses its fresh taste and becomes brittle. Brain plasticity is the capacity to turn stale bread into fresh bread. There are ways to turn stale bread into not so stale bread. Putting such bread into a steaming warm box often helps, but after this process, it is still rewarmed bread and not fresh bread.