“He seemed fine, seemed in good spirits. He appeared to be doing well,” Cousins said.
Griffin was scheduled to see an independent neurologist Monday evening. If he passes tests administered by that physician, he would be evaluated on a treadmill and do other physical work Tuesday, Shanahan said.
Before he can receive clearance to play, Griffin must pass neurological tests administered both by team doctors and an independent neurosurgeon, and must demonstrate that he can exercise at game-level exertion without a recurrence of concussion symptoms, according to Thom Mayer, medical director of the NFL Players Association.
The neuropsychological evaluation typically includes elements that measure reaction time and shape recognition, Mayer said. Many NFL teams use the computerized ImPACT (Immediate Post-Concussion Assessment and Cognitive Testing) test, Mayer said. To pass, Griffin would have to achieve results comparable to his baseline results from previous testing. Shanahan was unsure whether the Redskins employ the computerized testing system.
According to the ImPACT Web site, the test measures “verbal and visual memory, processing speed and reaction time.” Reaction time is measured to a hundredth of a second. The test, which takes approximately 20 minutes, measures aspects of cognitive functioning that include attention span, working memory, sustained and selective attention time, non-verbal problem-solving and reaction time.
Shanahan expressed optimism that Griffin would be able to play Sunday. But the coach said it is possible for the quarterback to suffer a setback in coming days that could prevent him from playing.