The quasistatic and dynamic bending responses of the human mid-lower cervical spine were determined using cadaver intervertebral joints fixed at the base to a six-axis load cell. Flexion bending was induced to the superior end of the specimen using an electrohydraulic piston. Each specimen was tested under three cycles of quasistatic load-unload and one high-speed dynamic load. A total of five specimens were included in this study. The maximum intervertebral rotation ranged from 11.0 to 15.4 degrees for quasistatic tests and from 22.9 to 34.4 degrees for dynamic tests. Exponential functions described the quasistatic and dynamic bending moment-rotation responses. The dynamic responses were stiffer than the corresponding quasistatic responses by a factor of 1.5 to 2.6. These results provide input data for lumped-parameter models and validation data for finite element models to better investigate the biomechanics of the human cervical spine.

This content is only available via PDF.
You do not currently have access to this content.