The Brain Injury Association of Delaware will hold its 24th annual brain injury conference, Joined Voices, Shared Journeys: The Brain Injury Experience, from 9 a.m. to 3 p.m., Thursday, March 12, at Dover Downs Conference Center. The keynote speaker will be Dr. Maulik P. Purohit, director of research, neuro-rehabilitation and traumatic brain injury at the Defense and Veterans Brain Injury Center, Fort Belvoir, Va.