Muscle-driven and torque-driven centrodes during modeled flexion of individual lumbar spines are disparate.

ABSTRACT: Lumbar spine biomechanics during the forward-bending of the upper body (flexion) are well investigated by both in vivo and in vitro experiments. In both cases, the experimentally observed relative motion of vertebral bodies can be used to calculate the instantaneous center of rotation (ICR). The timely evolution of the ICR, the centrode, is widely utilized for validating computer models and is thought to serve as a criterion for distinguishing healthy and degenerative motion patterns. While in vivo motion can be induced by physiological active structures (muscles), in vitro spinal segments have to be driven by external torque-applying equipment such as spine testers. It is implicitly assumed that muscle-driven and torque-driven centrodes are similar. Here, however, we show that centrodes q

SUBMITTER: Rockenfeller R 

PROVIDER: S-EPMC7892748 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature