Objectives This study is a preliminary study for safe and accurate cervical Hyeopcheok acupuncture by comparing the depth of cervical Hyeopcheok acupoint with cervical spine rotation. Methods Researchers took ultrasonographic images of cervical Hyeopcheok acupoint during full rotation of cervical spine, 45 degree rotation and neutral condition in a prone position. 4 healthy volunteers were recruited. Results No significant difference in needling depth of cervical Hyeopcheok acupoint was observed. However, there were a differences in anatomical structures' shape such as muscles. Conclusions There are no significant difference in needling depth, but anatomical structures' shape were changed. This result mean that if patient rotate cervical spine during acupuncture treatment, it can occur complications. Thus, when acupuncture treatment on cervical Hyeopcheok acupoint, practioner should make subject's cervical spine alignment corrected and be careful not to change posture during the procedure.
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