sensitivity and specificity of osteopathic tests will be conducted in comparaison to echograph results (a binary outcomes assessing the presence of an hypoechogenicity).~The reproductibility of osteopaths' tests will be be calculated using Cohen's kappa weighted by the distance between the TPs found.~Finally, the pain reported by patients on areas with a TP defined by the osteopath, and the pain reported by patients on areas without a TP defined by the osteopath will be compared using a student test.
Trigger points (TP) are described as hard, palpable nodules located within the taut bands of skeletal muscle (Bardoni, 2022).~The aim of this study is to evaluate the reproductibility of palpation of TP between osteopaths and to compare this perception to ultrasound measures of echogenicity.~Method:~A sample of 61 patients will be included in the study. An osteopath will determine the eligibility of the study. The supraclavicular area will be mark every 2 cm to establish a grid for all evaluations.~First an osteopath will evaluate with palpation the presence of TP at every box of the grid.~A second osteopath will evaluate the same boxes and will be blinded to the result of the first osteopath.~At each step of palpation, a pain assessment will be carried out at each box. Then, the ultrasound technician will evaluate the echogeneicity of every box and will be blinded to the prior results.~The protocol will be approve by a french ethic committee.