DANVILLE- A small tropical fish, the curiosity of a Geisinger research scientist and some college students have created the perfect storm of sorts in an attempt to find a cure for one of the world’s most devastating neurological diseases.On initial glance, there doesn’t seem to be much in common between zebrafish, researcher Glenn S. Gerhard, MD and a trio of Bucknell University biomedical engineering students. Yet they’re each playing a critical role in clearing a major roadblock in the search for a cure for Lou Gehrig’s disease.