Many manual therapists use anterior-posterior palpation of the cervical spine. Other than stating that the pressure should be directed at the anterior tubercles, previous authors did not quantify how to palpate to avoid performing a carotid sinus massage instead. Therefore, the purpose of this study is to investigate the anatomical landmark of the carotid sinus and common carotid artery so as to avoid it when performing anterior-posterior palpation of the middle to lower cervical anterior tubercle