Brain -- Concussion -- Case studies : Situational crisis communication theory and the National Football League : a case study of the NFL's response strategies to its concussion crisis / Sabrina Castonguay and Mark Douglas Lowes
Brain -- Concussion -- Public opinion : A hit on American football : a case study of bottom-up framing through op-ed readers' comments / Travis R. Bell, Jimmy Sanderson
Brain -- Concussion -- Research -- Case studies. : Assessing school nurses' experiences with comprehensive concussion management : using multimethodologies to collect meaningful data / Cailee E. Welch Bacon, Michelle L. Weber, Melissa C. Kay, Tamara C. Valovich McLeod
Brain -- Concussion -- United States -- Prevention : Managing youth sports concussions : Education Versus Legislation--Washington state passes a new law / presented by Stanley Herring ; produced by the American College of Sports Medicine
A nonspecific term used to describe transient alterations or loss of consciousness following closed head injuries. The duration of UNCONSCIOUSNESS generally lasts a few seconds, but may persist for several hours. Concussions may be classified as mild, intermediate, and severe. Prolonged periods of unconsciousness (often defined as greater than 6 hours in duration) may be referred to as post-traumatic coma (COMA, POST-HEAD INJURY). (From Rowland, Merritt's Textbook of Neurology, 9th ed, p418)
