title: Characteristics of PMHS Lumbar Motion Segments in Lateral Shear.
abstract: The purpose of this study was to determine the characteristics of eighteen lumbar spine motion segments subjected to lateral shear forces under quasi-static (0.5 mm/s) and dynamic (500 mm/s) test conditions. The quasi-static test was also performed on the lumbar spine of a side impact anthropomorphic test device, the EuroSID-2 (ES-2). In the quasi-static tests, the maximum force before disc-endplate separation in the PMHS lumbar motion segments was 1850 +/- 612 N, while the average linear stiffness of PMHS lumbar motion segments was 323 +/- 126 N/mm. There was a statistically significant difference between the quasi-static (1850 +/- 612 N) and dynamic (2616 +/- 1151 N) maximum shear forces. The ES-2 lumbar spine (149 N/mm) was more compliant than the PMHS lumbar segments under the quasi-static test condition.
authors.affiliation: Ford Motor Company, Dearborn, MI, 48121, USA. ssundar1@ford.co.
authors.forename: Srini
authors.initials: S
authors.lastname: Sundararajan
authors.forename: Priya
authors.initials: P
authors.lastname: Prasad
authors.forename: Stephen W
authors.initials: SW
authors.lastname: Rouhana
authors.forename: Constantine K
authors.initials: CK
authors.lastname: Demetropoulos
authors.forename: King H
authors.initials: KH
authors.lastname: Yang
authors.forename: Albert I
authors.initials: AI
authors.lastname: King
authors.forename: Lutz P
authors.initials: LP
authors.lastname: Nolte