title: When is a concussion no longer a concussion?
authors.forename: Erin D
authors.initials: ED
authors.lastname: Bigler
authors.forename: Ellen
authors.initials: E
authors.lastname: Deibert
authors.forename: Christopher M
authors.initials: CM
authors.lastname: Filley
mesh_terms: D001924:Brain Concussion; D001927:Brain Diseases / Q000473:pathology*; D003863:Depression / Q000473:pathology*; D005538:Football; D006801:Humans