Keith Yeates (IMAGE) University of Calgary Caption Principal investigator Keith Yeates says the study may bring some relief to parents concerned about their child's recovery from concussion. Credit Riley Brandt, University of Calgary Usage Restrictions Photo credit required License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.