Investigation of pediatric neck response and muscle activation in low-speed frontal impacts

Pediatric necks present different responses and injury patterns compared with those of adults in motor vehicle crashes (MVCs). To evaluate the effect of different muscle modeling methodologies, three muscle models were developed and simulated under low-speed frontal impact conditions with an average peak acceleration of 3g's. The muscle activation curve for the curve-guided model, the muscle segment was curved using guiding nodes, was further optimized based on experimental data. The pediatric neck model was also simulated under more severe frontal impact conditions with an average peak acceleration of 8g's. Simulation results revealed that the curve-guided model needed more muscle force than the straight-guided model, in which the muscle segment was straight with guiding nodes, and the curve-constrained model, in which the muscle segment was curved without guiding nodes and which imposes more constraints on the head and neck than the curve-guided model. The predicted head responses for the child finite element neck model were within or close to the experimental corridors of 3- and 8-g's frontal impacts. The neck injuries for a 10-year-old child commonly occurred at the interspinous ligament in the C7–T1 segment. The model could be used to analyze the responses and injuries of pediatric neck and head in low-speed frontal impacts.

[1]  D Fife,et al.  Anatomic Location of Spinal Cord Injury: Relationship to the Cause of Injury , 1986, Spine.

[2]  Koji Mizuno,et al.  Development of Three-Year-Old Child Human FE Model , 2004 .

[3]  D. Brockmeyer,et al.  Cervical spine trauma in children: a review. , 2006, Neurosurgical focus.

[4]  Roger W Nightingale,et al.  Improved estimation of human neck tensile tolerance: reducing the range of reported tolerance using anthropometrically correct muscles and optimized physiologic initial conditions. , 2003, Stapp car crash journal.

[5]  N Yoganandan,et al.  Human head-neck biomechanics under axial tension. , 1996, Medical engineering & physics.

[6]  K. Brolin,et al.  The Effect of Muscle Activation on Neck Response , 2005, Traffic injury prevention.

[7]  H J Mertz,et al.  The Hybrid III 10-Year-Old Dummy. , 2001, Stapp car crash journal.

[8]  V. Vécsei,et al.  Cervical spine injuries in pediatric patients. , 2007, The Journal of trauma.

[9]  S. Govender,et al.  Spinal injuries in children. , 1990, Injury.

[10]  Dimitrios Kallieris,et al.  COMPARISON BETWEEN CHILD CADAVERS AND CHILD DUMMY BY USING CHILD RESTRAINT SYSTEMS IN SIMULATED COLLISIONS , 1976 .

[11]  M. Panzer,et al.  Cervical spine response in frontal crash. , 2011, Medical engineering & physics.

[12]  Harold J. Mertz,et al.  Biomechanical basis for the CRABI and Hybrid III child dummies , 1997 .

[13]  Jack M. Winters,et al.  How detailed should muscle models be to understand multi-joint movement coordination? , 1995 .

[14]  Jack M. Winters,et al.  Multiple Muscle Systems: Biomechanics and Movement Organization , 2011 .

[15]  L. M. Patrick,et al.  Living Human Dynamic Response to —G x Impact Acceleration II—Accelerations Measured on the Head and Neck , 1969 .

[16]  Kristy B Arbogast,et al.  Comparison of kinematic responses of the head and spine for children and adults in low-speed frontal sled tests. , 2009, Stapp car crash journal.

[17]  Yogesh Narayan,et al.  Analysis of low velocity frontal impacts. , 2003, Clinical biomechanics.

[18]  A. Dibb,et al.  Pediatric Head and Neck Dynamic Response: A Computational Study , 2011 .

[19]  D. J. Thomas,et al.  Human Volunteer Head-Neck Response in Frontal Flexion: a New Analysis , 1995 .

[20]  L Stark,et al.  Estimated mechanical properties of synergistic muscles involved in movements of a variety of human joints. , 1988, Journal of biomechanics.

[21]  Feng Luan,et al.  DEVELOPMENT OF A FINITE ELEMENT MODEL OF THE HUMAN NECK , 1998 .

[22]  Tadeusz J. Janik,et al.  Cobb Method or Harrison Posterior Tangent Method: Which to Choose for Lateral Cervical Radiographic Analysis , 2000, Spine.

[23]  Erich Schuller,et al.  CENTER OF GRAVITY AND MOMENTS OF INERTIA OF HUMAN HEADS , 1979 .

[24]  King H. Yang,et al.  Strain-based regional traumatic brain injury intensity in controlled cortical impact: a systematic numerical analysis. , 2011, Journal of neurotrauma.

[25]  Peter Halldin,et al.  Neck Muscle Load Distribution in Lateral, Frontal, and Rear-End Impacts: A Three-Dimensional Finite Element Analysis , 2009, Spine.

[26]  Renée M. Dawson.  Differences between adult and pediatric neck muscle stress due muscle recruitment patterns , 2011 .

[27]  Dimitrios Kallieris,et al.  Comparison of anthropomorphic test dummies with a pediatric cadaver restrained by a three-point belt in frontal sled tests , 2008 .

[28]  C A Van Ee,et al.  Quantifying skeletal muscle properties in cadaveric test specimens: effects of mechanical loading, postmortem time, and freezer storage. , 2000, Journal of biomechanical engineering.

[29]  Qing Hang Zhang,et al.  Finite element analysis of head-neck kinematics during motor vehicle accidents: analysis in multiple planes. , 2007, Medical engineering & physics.

[30]  J. Winters.  Hill-Based Muscle Models: A Systems Engineering Perspective , 1990 .

[31]  King H. Yang,et al.  Development and Validation of a 10-Year-Old Child Ligamentous Cervical Spine Finite Element Model , 2013, Annals of Biomedical Engineering.

[32]  J. Laidlaw,et al.  ANATOMY OF THE HUMAN BODY , 1967, The Ulster Medical Journal.

[33]  A. Sances,et al.  Dynamic Response of Human Cervical Spine Ligaments , 1989, Spine.