Sillevis, Rob, David Stockhausen, SPT, Nicole Gerdts, DPT, & Anne Weller Hansen, BS, MBA. " An isolated contraction of the Obliquus Capitis Inferior and Rectus Capitis Posterior Major demonstrated with Musculoskeletal Ultrasound Imaging." Medical Research Archives [Online], 11.6 (2023): n. pag. Web. 26 Dec. 2024