The Checklight, developed in conjunction with Cambridge-based electronics company MC10, is a wearable device that monitors head impacts.
A hockey player would wear a skull cap under his or her helmet. A tab containing the impact sensors slides into a groove inside the cap. An indicator with green, yellow, and red lights is positioned outside the cap along the back of the player’s neck.
Green means all is well. The light turns yellow when sensors recognize an athlete absorbs a moderate impact. Red indicates a severe impact. The degrees of severity are based on Head Injury Criterion (HIC). The US National Highway Traffic Safety Administration uses HIC values to determine car safety ratings. Full story for BostonGlobe.com subscribers.
Fluto Shinzawa can be reached at email@example.com. Follow him on Twitter @GlobeFluto. Material from interviews, wire services, other beat writers, and league and team sources was used in this report.