Dynamic spinal posture and pelvic position analysis using a rasterstereographic device.

Area of Science:

• Biomechanical analysis
• Spinal kinematics
• Medical imaging technology

Background:

• Traditional rasterstereography for spinal analysis was limited to static measurements.
• Evaluating dynamic spinal motion is crucial for diagnosing and treating spinal pathologies.
• This study aimed to assess spinal posture and pelvic position under dynamic conditions using rasterstereography.

Purpose of the Study:

• To investigate spinal posture and pelvic positioning under dynamic walking conditions.
• To compare dynamic spinal measurements with static measurements.
• To evaluate the utility of dynamic rasterstereography in assessing spinal motion.

Main Methods:

• 121 healthy volunteers (56 female, 65 male) participated in this observational study.
• Spinal parameters including trunk inclination, imbalance, pelvic obliquity, kyphotic angle, lordotic angle, surface rotation, and lateral deviation were measured.
• Measurements were taken under static conditions and dynamic conditions at speeds of 1, 2, 4, and 5 km/h using the Formetric 4D Motion® system.

Main Results:

• Female volunteers exhibited a higher lordotic angle than males under static conditions (p < 0.001).
• Trunk inclination, vertebral kyphotic angle, and surface rotation increased significantly under dynamic conditions (p < 0.001).
• Trunk inclination and lordotic angle showed significant changes during walking compared to static posture (p < 0.001).

Conclusions:

• Spinal posture differs between sexes during both standing and walking.
• Dynamic rasterstereography is a valuable tool for evaluating spinal posture and pelvic position.
• This technology can quantify spinal motion, potentially improving the understanding and treatment of spinal pathologies.