Additional file 1.

Video clip of thoracolumbar fascia motion in human subject with No-LBP. Ultrasound B-scan acquired during passive trunk flexion induced by a motorized articulated table. Ultrasound transducer is placed longitudinally 2 cm from the midline at the level of the L2-3 interspace.

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Langevin et al. BMC Musculoskeletal Disorders 2011 12:203   doi:10.1186/1471-2474-12-203