Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2020 Nov 18;11(8):1307–1312. doi: 10.1177/2192568220972076

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© The Author(s) 2020

This article is distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 License (https://creativecommons.org/licenses/by-nc-nd/4.0/) which permits non-commercial use, reproduction and distribution of the work as published without adaptation or alteration, without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).

PMC Copyright notice

Figure 4. — Chin-Brow Vertical Angle (CBVA) is determined by measuring a line drawn from the patient’s chin to their brow and taking the angle between this line and a vertical line drawn perpendicular to the ground. As such, tilting the head down so that the gaze is toward the floor produces a positive CBVA, while tilted the head up produces a negative CBVA. When the head is in a neutral position with the chin-brown line perpendicular to the floor, the CBVA is zero degrees.