1.0Best Spine Hospitalshttps://www.bestspinehospitals.com/blogdrspinehttps://www.bestspinehospitals.com/blog/author/drspine/Co1: Definition, Uses, and Clinical Overview - Best Spine Hospitalsrich600338<blockquote class="wp-embedded-content" data-secret="G95G248tvk"><a href="https://www.bestspinehospitals.com/blog/co1-definition-uses-and-clinical-overview/">Co1: Definition, Uses, and Clinical Overview</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://www.bestspinehospitals.com/blog/co1-definition-uses-and-clinical-overview/embed/#?secret=G95G248tvk" width="600" height="338" title="“Co1: Definition, Uses, and Clinical Overview” — Best Spine Hospitals" data-secret="G95G248tvk" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript">
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Co1 is the first coccygeal vertebra—the top segment of the coccyx (commonly called the tailbone). It sits just below the sacrum at the sacrococcygeal joint. Co1 is commonly referenced in spine and pelvic imaging reports, especially when evaluating tailbone pain. It can also be a target or landmark for certain injections or, less commonly, surgical procedures involving the coccyx.