title: Rotational mobility of the human back in forward flexion.
abstract: This paper describes the measurement of the ability of the human back to twist when in flexed postures using a new electromagnetic measurement device. The mobility of the lumbar spine in 12 normal male subjects was investigated and it was demonstrated that increased rotation was possible when in a flexed posture. This suggests that the intervertebral disc may be vulnerable to torsion when twisting is combined with sub-maximal sagittal flexion.
authors.affiliation: Bioengineering Research Group, University of Durham, Science Laboratories, UK.
authors.forename: R J
authors.initials: RJ
authors.lastname: Hindle
authors.forename: M J
authors.initials: MJ
authors.lastname: Pearcy
mesh_terms: D000328:Adult; D055590:Electromagnetic Phenomena / Q000295:instrumentation; D006801:Humans; D008159:Lumbar Vertebrae / Q000502:physiology*; D008297:Male; D011187:Posture; D012016:Reference Values; D012399:Rotation