Overview
- The peer-reviewed paper from Yamaguchi University, published in The Anatomical Record, ties the air-righting reflex to segment-specific spine mechanics.
- Mechanical tests found the thoracic spine has a neutral torsional zone of about 47–50 degrees with lower stiffness, while the lumbar spine is stiffer and showed no neutral zone.
- High-speed videos of two cats revealed sequential trunk rotation, with the anterior body segment rotating first and the posterior following after a 72–94 millisecond delay.
- The team tested separated thoracic and lumbar sections from five donated cat cadavers in a torsion rig and tracked two live cats dropped onto a cushioned surface using motion markers.
- The authors cite potential uses in motion modeling, veterinary spine care, and robotics, while noting a small sample size and possible effects from rib cage cuts on thoracic measurements.