SCAT symptom severity scores (IMAGE) Experimental Biology Caption Rugby players who experienced a head impact reported symptoms of higher severity compared to the players who just played a match but did not have a head impact. However, a number of players without a head impact also reported symptoms of higher severity. Credit Integrative Human Physiology at Rutgers University Usage Restrictions Credit must be given to the creator. License CC BY 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.