There is variability in our perception of the standard head orientation. GN Hughes, J Gateño, JD English, JF Teichgraeber, JJ Xia.

Date: May 2017 (On-line). Source: International Journal of Oral and Maxillofacial Surgery. Abstract: The purposes of this study were to determine: (1) whether an observer’s perception of the correct anatomical alignment of the head changes with time, and (2) whether different observers agree on the correct anatomical alignment. To determine whether the perception of the…