“…of the multifidus muscle or of motor control, which are recommended for diagnosis, demonstrating their suitability as a direct examination technique for the clinical appraisal of TLFD 30,39,40 . While most US studies that quantified the gliding or deformation of the TLF did not test the method for reliability 8,22,26,41,42 , Langevin et al 12 controlled the intra-rater reliability of their calculation method and found an ICC of .98, which was slightly higher than our results.…”