... days following aconcussion in an elite athlete. Brain Injury 2009, 23(4):362-369.22. Chou LS, Kaufman KR, Walker-Rabatin AE, Brey RH, Basford JR: Dynamicinstability during obstacle crossing following ... control following concussion is better detected with an attention test during gait. GaitPosture 2007, 25:406-411.2. Catena RD, van Donkelaar P, Chou L-S: Cognitive task effects on gaitstability following ... instability following traumatic brain injury. ArchPhys Med Rehabil 1996, 77(7):639-644.4. Parker TM, Osternig LR, Lee HJ, van Donkelaar P, Chou L-S: The effect ofdivided attention on gait stability following...