Tom McDonald, Jason Fierle.Sandi Doughton connects football, war injuries, and dementia. The common node is Microsoft Founder and Seattle Seahawks owner Paul Allen, who has long followed—and funded—neuroscience and brain research. In this article for the Seattle Times, Sandi relates how Seattle has become a leader in studying how traumatic brain injury affects later health and cognition. @sandidoughton photo:Tom McDonald, Jason Fierle