Crash test dummy with live neurons maps head impacts to cell damage

A team led by Raisa Akhtaruzzaman and Ashfaq Adnan at UT Arlington created a novel biomechanical surrogate that combines a full-body crash-test dummy with live neurons. They placed three vertically stacked Petri dishes of SH-SY5Y neuroblastoma cells inside the dummy's head, along with six accelerometers—three on the head surface and three embedded in the cell stacks. By dropping the dummy from controlled seated release angles of 30°, 60°, and 90°, they measured both the mechanical response (peak linear acceleration 170–258g at 90°, maximum headform deformation ~9.4mm) and the biological response of the cells.

At the steepest 90° impact, oxidative stress in the neurons approximately doubled compared to control samples, and the cells showed focal drift—evidence that mechanical forces directly translate into cellular injury. The team also built an OpenSim-based musculoskeletal model to simulate the falls, finding that contact stiffness was the dominant factor in predicted head acceleration. This integrated framework gives researchers a way to compare surrogate measurements with human head-neck response, paving the way for better concussion models, helmet testing, and injury diagnostics that account for real biological damage—not just acceleration numbers.