Margaret — who just turned 86 — has the brain health and cognitive function of someone 20 years her junior and shows no sign of dementia.

A knock or jolt to the head can set off a wave of changes in your brain that may need proper management for long-term recovery.

Is the function which allows us to perform actions without conscious effort in the muscles or the mind.

Does the practice of mindfulness physically change the brain and if so, how do we know.