Rotational mobility of the human back in forward flexion.
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.
Hindle
R J
RJ
Bioengineering Research Group, University of Durham, Science Laboratories, UK.
Pearcy
M J
MJ
D000328:Adult; D055590:Electromagnetic Phenomena / Q000295:instrumentation; D006801:Humans; D008159:Lumbar Vertebrae / Q000502:physiology*; D008297:Male; D011187:Posture; D012016:Reference Values; D012399:Rotation