Here are a few links that might be helpful in being able to understand symptoms of brain mets. Feel free to add any other references you might have.
Cancer: Four symptoms that could suggest brain metastasis
http://www.cityofhope.org/blog/cance...ain-metastasis
Talking about Symptoms | BrainMetsBC.org
http://www.brainmetsbc.org/en/conten...about-symptoms
Here's s link that discusses the types of neurological testing we undergo with brain mets. You can do some of these in front of a mirror to see how your facial muscle control is, the balance ones can also be done at home. Some of the tests are best done with another person such as touch your nose then touch the moving finger.
http://www.abta.org/brain-tumor-info...ical-exam.html