Whole-body response to pure lateral impact

Area of Science:

• Biomechanics
• Injury Biomechanics
• Human Subject Research

Background:

• Understanding human response to lateral impact is crucial for vehicle safety.
• Existing data for low-speed lateral impacts is limited.
• Previous research often lacks detailed biomechanical data.

Purpose of the Study:

• To comprehensively characterize human biomechanical response to whole-body, lateral impact.
• To quantify subject responses and boundary condition interactions.
• To investigate the role of the shoulder in lateral impact injury.

Main Methods:

• Three male postmortem human subjects (PMHS) were subjected to lateral impacts at 4.3 m/s.
• Optoelectronic stereophotogrammetry tracked 3D motion of subjects and impactor.
• Accelerometers and a chestband recorded kinematic and deformation data.

Main Results:

• One subject sustained 16 rib fractures and shoulder injury; two subjects had no injuries.
• Shoulder injury in the affected subject may have contributed to rib fractures.
• Shoulder appears to be a significant load path for lateral forces.

Conclusions:

• The shoulder plays a critical role in transmitting lateral forces to the spine.
• The shoulder may shield the ribcage, but injury can lead to rib fractures.
• This study provides valuable data for lateral impact scenarios below 6.7 m/s.