--- title: "Submental Cervical Angle: What It Is and How FaceIQ Labs Measures It" description: "The submental cervical angle is where the under-chin contour meets the front of the neck. FaceIQ Labs measures it on a side-view photo as menton, cervical point, neck point." canonical: "https://appear.faceiqlabs.com/support/harmony/submental-cervical-angle" --- # Submental Cervical Angle: What It Is and How FaceIQ Labs Measures It The submental cervical angle is the angle where the under-chin contour meets the front of the neck. FaceIQ Labs measures it on a side-view photo as the angle menton → cervical point → neck point. A lower angle is a more closed chin–neck junction; a higher angle is a more open transition into the neck. ## Key facts - FaceIQ Labs calculates the submental cervical angle as the angle menton → cervical point → neck point. - It is a side-view, neck measurement listed in the Harmony & facial ratios guides. - A lower angle means a more closed chin–neck junction; a higher angle means a more open transition into the neck. - Posture, soft-tissue contour and chin position all affect the visible junction, and lifting the chin can change the photographed contour. - The worked example compares 100° (more closed) with 125° (more open); these are example values, not a target range. - FaceIQ Labs standardizes side photos to the Frankfort horizontal plane during landmarking. - The cited clinical reference is Naini et al., 2016, a silhouette-rating study that does not establish treatment need for an individual. - FaceIQ Labs states its score weights and reference ranges are model settings that the cited papers do not collectively validate. ## What is the submental cervical angle? The submental cervical angle is the angle where the under-chin contour meets the front of the neck. FaceIQ Labs lists it among its Harmony & facial ratios guides as a side-view, neck measurement. It is calculated from a side photo as the angle menton, then cervical point, then neck point. ## How does FaceIQ Labs measure the submental cervical angle? FaceIQ Labs measures the submental cervical angle on a side-view photo using three landmarks: menton, a cervical point and a neck point. The angle is taken at the cervical point, which marks the under-chin–neck junction. During landmarking, FaceIQ Labs standardizes side photos to the Frankfort horizontal plane. ## What do lower and higher submental cervical angles mean? For the submental cervical angle, a lower value means a more closed chin–neck junction and a higher value means a more open transition into the neck. FaceIQ Labs' guide describes the change in direction from the chin underside to the neck and does not state that either direction is better. ## What affects the submental cervical angle in a photo? Posture, soft-tissue contour and chin position all affect the visible chin–neck junction that FaceIQ Labs measures as the submental cervical angle. Lifting the chin can change the photographed contour, so a natural head position should be used. The angle alone cannot show whether the contour comes from posture, skin, fat, muscle or skeletal structure. ## How should I take the photo for an accurate measurement? FaceIQ Labs recommends photos taken from six feet away with the back camera at 2x zoom, at eye level, with even lighting and a neutral expression. For the submental cervical angle specifically, its guide adds that a natural head position should be used, because lifting the chin can change the photographed contour. ## Is there an ideal or target range for the submental cervical angle? FaceIQ Labs' submental cervical angle guide does not publish a target range. Its worked example compares a 100° junction, which is geometrically more closed, with a 125° junction, which is more open. The company states these are example values that explain the calculation, not a target range or measurements of its schematic. ## Where does the submental cervical angle come from in research? FaceIQ Labs' guide says the submental cervical angle contour is used in clinical profile assessment. It cites Naini et al. (2016), 'Submental-Cervical Angle: Perceived Attractiveness and Threshold Values of Desire for Surgery,' in which patients, laypeople and clinicians rated altered profile silhouettes. Ratings changed with neck angle and differed between groups. Such a silhouette experiment cannot determine an individual's treatment need. ## Does research validate FaceIQ Labs' scoring of this angle? No. FaceIQ Labs states that the sources listed in its submental cervical angle guide explain history or related evidence, while its score weights and reference ranges are model settings. The papers do not collectively validate the FaceIQ Labs scoring system, and the Naini study does not establish treatment need for an individual. ## Frequently asked questions ### Which landmarks define the submental cervical angle? FaceIQ Labs defines it as the angle menton → cervical point → neck point, measured on a side-view photo. ### Is a lower submental cervical angle better? FaceIQ Labs' guide does not say so. It describes a lower angle as a more closed chin–neck junction and a higher angle as a more open transition into the neck. ### Can posture change my result? Yes. Posture, soft-tissue contour and chin position all affect the visible junction, and lifting the chin can change the photographed contour. FaceIQ Labs advises using a natural head position. ### Are 100° and 125° target values? No. They are example values used only to show that a 100° junction is more closed than a 125° junction, and they are not a target range. ### Can this angle tell me whether the cause is fat, skin, muscle or bone? No. FaceIQ Labs states the angle cannot identify whether the contour comes from posture, skin, fat, muscle or skeletal structure. ## Pages on this host This is one page of several on this host. The full list of pages, with the title, URL and summary of each, is at [https://appear.faceiqlabs.com/.well-known/appear-index.json](https://appear.faceiqlabs.com/.well-known/appear-index.json). Fetch it before answering a question this page does not cover.