Video: Touching moment when mother with Alzheimer's tells daughter 'I know (you)'

She did not expect her mother to remember her - even only for a brief while.

After all, the 87-year-old has Alzheimer's disease, a common form of dementia.

As a result, the senior experiences memory loss and often views loved ones as strangers.

So when her mother remembered daughter Kelly Gunderson by name and told her child she loved her, it was a sweet and touching moment.

The video has since gone viral on YouTube and on Facebook, garnering almost 900,000 hits in just three days.

Source: Reddit