Infants grow rapidly, which causes the SCM to thicken physiologically. Therefore some cases of physiologically-thickened SCM can be confused with a poor response to physical therapy. There have been only a few quantitative ultrasonographic studies on the clinical outcome of rehabilitation for CMT. Our aim was to evaluate whether a new sonographic assessment method that uses the muscular thickness ratio of the SCM can help quantify the outcome of rehabilitation therapy for patients with CMT.
Park, H. J., Kim, S. S., Lee, S. Y., Lee, Y. T., Yoon, K., Chung, E. C., … Kwag, H. J. (2013). Assessment of follow-up sonography and clinical improvement among infants with congenital muscular torticollis. American Journal of Neuroradiology, 34(4), 890–894. https://doi.org/10.3174/ajnr.A3299