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Biofidelic whole cervical spine model with muscle force replication for whiplash simulation
P C Ivancic1, Manohar M Panjabi, S Ito
1Biomechanics Research Laboratory, Department of Orthopaedics and Rehabilitation, Yale University School of Medicine, New Haven, Connecticut 06520-8071, USA.
Summary
A new dynamic whole cervical spine model accurately replicates muscle forces for whiplash simulations. This advanced biomechanical model provides biofidelic responses, enhancing understanding of whiplash injuries.
Area of Science:
- Biomechanics
- Orthopedics
- Trauma research
Background:
- Previous whiplash models often lack dynamic biofidelity.
- Simulating whiplash injuries requires accurate replication of cervical spine mechanics.
Purpose of the Study:
- Develop a novel dynamic whole cervical spine model with anterior, lateral, and posterior muscle force replication.
- Experimentally evaluate the model's performance.
- Compare model outputs with in vivo human data.
Main Methods:
- Rear-impact whiplash simulations using an incremental trauma approach.
- Testing at T1 horizontal accelerations ranging from 3.6 g to 7.9 g.
- Analysis of kinematic responses, including head-T1 extension and intervertebral rotations.
Main Results:
- The model demonstrated biofidelic dynamic responses, closely matching in vivo data.
- Peak head-T1 extension aligned with the in vivo corridor at 3.6 g.
- Intervertebral rotations were within or slightly exceeded 95% confidence limits of in vivo data.
Conclusions:
- The new whole cervical spine model with muscle force replication achieves dynamic biofidelity.
- This model can generate crucial biomechanical data for improved whiplash injury research.
- The findings contribute to a better understanding of whiplash injury mechanisms.