Learn more about whether Ionis Pharmaceuticals, Inc. or PTC Therapeutics, Inc. is a better investment based on AAII's A+ Investor grades, which compare both companies' key financial metrics.

Problems with chemical messengers like dopamine were tied to posture issues in SMA in a mouse study, but levodopa therapy may ease symptoms.

Columnist Helen Baldwin gains a different perspective following a crushing diagnosis, but glasses weren't what helped her to see clearly.