Thus far, 21 states and the District of Columbia have approved medical marijuana use to relieve symptoms of various illnesses. That substance may help some, but not all, people with brain diseases.

When admitted to a hospital emergency department, elderly patients who suffer from dementia and delirium often do not understand why they are there. They also tend to not understand ER discharge instructions.

The discovery of a small family of molecules could lead to big advances in the treatment of Parkinson's, Alzheimer's and Huntington's diseases. The molecules protect brain cells in these nerve-degenerative diseases.

Harry Potter scribe J.K. Rowling has donated £10 million to the University of Edinburgh to establish the Anne Rowling Regenerative Neurology Clinic.