Mayo Clinic Jacksonville has received a five-year $7 million grant from the National Institutes of Health to continue its study into the genetic causes of Parkinson’s disease. The clinic’s Udall Center of Excellence in Parkinson’s disease has received funding for research since 1999. In recent years, that funding has dropped to about $500,000 a year, said Dennis Dickson, a neuropathologist and the center’s director. Unlike a yearly grant, the current grant is guaranteed for five years. Mayo researchers have identified 10 genes connected to Parkinson’s or related neurodegenerative diseases.