title: Sideflexion induced lumbar spine conjunct rotation and its influencing factors.
abstract: Twenty motion segments from four male post mortem subjects with a mean age of 29 years were moved into the lumbar spine test positions of extension/left sideflexion, extension/right sideflexion, flexion/left sideflexion and flexion/right sideflexion Jheconjunct rotation (CR) that occurred was measured from a photographic record. The results indicated that the direction of the CR of the whole lumbar spine (ie between L1 and S1) was significantly different between the flexed and extended lumbar spine position. The direction of the CR was also significantly different between the different intervertebral motion segment levels. There was no relationship between CR and zygapophyseal joint geometry or intervertebral disc degeneration.
authors.forename: G
authors.initials: G
authors.lastname: Vicenzino
authors.forename: L
authors.initials: L
authors.lastname: Twomey
keywords: Biomechanics; Lumbar Vertebrae; Posture