In a series of stories the St. Louis Post-Dispatch is writing about one woman's journey with dementia, experts have stressed that while there is no cure for causes such Alzheimer's disease, an early and accurate diagnosis in important.

One critical component neurologists must rely when making a diagnosis on is an evaluation by a neuropsychologist.

In the following episode, the reporter in our dementia series, Michele Munz, talks with neuropscychologist Jason Hassenstab with Washington University School of Medicine.

He explains when and why an evaluation is needed, how it works and what to expect.