Summary / conclusions The SCAT is the most widely accepted and deployable sport concussion assessment and screening tool currently available .
There is some degree of support for using the SCAT2/SCAT3 and ChildSCAT3 in the evaluation of SRC , with and without baseline data .
The addition of an oculomotor examination seems indicated , although the most valid method for assessing oculomotor function is not clear .
Video-observable signs of concussion show promise , but there is insufficient evidence to warrant widespread use at this time
Objectives Several iterations of the Sport Concussion Assessment Tool ( SCAT ) have been published over the past 16 years .
Our goal was to systematic ally review the literature related to the SCAT and provide recommendations for improving the tool .
Effect of acute exercise on clinically measured reaction time in collegiate athletes.
PURPOSE We have developed a reliable and valid clinical test of reaction time ( RTclin ) that is sensitive to the acute effects of concussion . If RTclin is to be used as a sideline concussion assessment tool then the acute effects of exercise on RTclin may need to be controlled for . The purpose of this study was therefore to determine the effect of exercise on RTclin . METHODS A gender-balanced group of 42 collegiate athletes were assigned to an  exercise ( n = 28 ) and a  control ( n = 14 ) group using 2:1 block r and omization . The exercise group completed a grade d four-stage exercise protocol on a stationary bicycle ( 100 W × 5 min ; 150 W × 5 min ; 200 W × 5 min ; sprint × 2 min ) , whereas the control group was tested at identical periods without exercising .  Mean RTclin was calculated for eight trials as the fall time of a vertically suspended rigid shaft after its release by the examiner before being caught by the athlete . RTclin was measured at baseline and after each of the four stages . RESULTS As both HR and RPE significantly increased for the four stages in the exercise group ( P < 0.001 ) , mean RTclin showed a significant overall decline during repeated test administration ( P < 0.008 ) . However , there were no significant group ( exercise vs control , P = 0.822 ) or group-by-stage interaction ( P = 0.169 ) effects on RTclin as assessed by repeated- measures analysis of variance . CONCLUSIONS Exercise did not appear to affect RTclin performance in this study . This suggests that RTclin measured during a sideline concussion assessment does not need to be adjusted to account for the acute effects of exercise
Summary / conclusions The SCAT is the most widely accepted and deployable sport concussion assessment and screening tool currently available .
There is some degree of support for using the SCAT2/SCAT3 and ChildSCAT3 in the evaluation of SRC , with and without baseline data .
The addition of an oculomotor examination seems indicated , although the most valid method for assessing oculomotor function is not clear .
Video-observable signs of concussion show promise , but there is insufficient evidence to warrant widespread use at this time
Objectives Several iterations of the Sport Concussion Assessment Tool ( SCAT ) have been published over the past 16 years .
Our goal was to systematic ally review the literature related to the SCAT and provide recommendations for improving the tool .