There have been some very valuable resources to this blog, one who continually provides a vast amount of information both for posting and in the comment section is Don Brady, PhD, PsyD, NCSP, LMFT. He along with his wife, Flo, have written to often cited pieces of information on concussions. The first is the Communique on Sport-Related Concussions from the NASP. The second is the common myths associated with concussions. Let us not forget some the excerpts from his dissertation.
Recently Dr. Brady has sent me a couple of articles, neither of which were earth shattering in content, rather they were interesting due to the publication dates on them.
The first is a guest editorial by Allan J. Ryan, MD and appeared in The Physician and Sports Medicine, in 1987, 25 years ago (emphasis mine);
Rimel et all found that such events may be followed for weeks or months by symptoms and disorders of brain function that can be measured objectively. Gronwall and Wrightson found that persons who have sustained concussion show a reduced information-processing rate that may persist beyond 35 days when other post concussion symptoms (such as poor concentration, irritability, and fatigue) are present. Also, 20 young adults had less information-processing ability and took longer to recover following a second concussion that controls who had sustained only one concussion. Thus, a cerebral concussion is a serous event that is indicative of an injury to the brain, and should be taken very seriously.