The facial angle refers to a measurement used in anthropometry to assess the magnitude of the angle formed by specific anatomical landmarks on the face. It is typically measured by drawing two lines: one connecting the tip of the nose (nasion) to the point where the forehead and nose meet (glabella), and the other line connecting the glabella to the most forwardly projecting point on the upper jaw (gnathion). The angle is then determined by measuring the intersection of these lines.
This facial angle measurement is an important tool in studies related to human evolution, genetics, and craniofacial morphology. It provides valuable insights into the shape, structure, and proportions of the face, allowing researchers to compare and analyze variations among different populations and evaluate phenotypic characteristics.
The facial angle has been recognized as an indicator of skull and facial development, with deviations from the normal range potentially indicating abnormal growth patterns, genetic disorders, or other conditions affecting facial structure. Moreover, the facial angle has been investigated in relation to cognitive ability, with some researchers suggesting a correlation between the angle and brain size.
In summary, the facial angle is a quantitative measurement in anthropometry that evaluates the angle formed by specific facial landmarks. It plays a crucial role in understanding facial morphology, studying human populations, and assessing developmental abnormalities or potential associations with other biological features.
The word "facial angle" is derived from the combination of two terms: "facial" and "angle".
1. Facial: The term "facial" originated from the Latin word "facies", which means "face" or "form". It entered English through the Old French word "fascial" in the 17th century, referring to anything related to the face or appearance.
2. Angle: The word "angle" has its roots in the Latin word "angulus", which means "corner" or "bend". It is derived from the Greek word "ankulos". In English, "angle" has been used since the 14th century to describe the shape formed by two intersecting lines.
Combining these two terms, "facial angle" refers to the angle formed between specific facial landmarks or reference points on the face.