BASILAR ANGLE Meaning and
Definition
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Basilar angle is a term originating from anatomy and refers to the angle formed by the intersection of two lines or planes in the skull. It specifically pertains to the angle formed between the basion, a point at the base of the anterior wall of the foramen magnum (the large opening in the base of the skull), and the opisthion, a point on the posterior margin of the foramen magnum.
The basilar angle is used to measure the degree of flexion or extension of the skull in relation to the rest of the vertebral column, providing insights into cranial orientation and position. In humans, this angle typically ranges from 139 to 153 degrees, with variations according to age, sex, and ethnicity.
The measurement of the basilar angle is particularly significant in the fields of anthropology and forensic medicine, as it can aid in identifying certain cranial features and characteristics among individuals. For instance, a relatively large basilar angle may suggest a more forwardly positioned occipital bone, which can be observed in certain groups of individuals such as Neanderthals.
In summary, the basilar angle is an anatomical measurement that quantifies the angle between the basion and opisthion points in the skull, providing information about the orientation and position of the cranium. It plays a crucial role in disciplines like anthropology and forensic medicine due to its contribution in analyzing cranial features and identifying specific characteristics among individuals.
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• Broca's a., one formed by the intersection at the basion of lines coming from the nasal spine and the nasal point.
• Broca's angle, see under angle.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for BASILAR ANGLE
- vasilar angle
- nasilar angle
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Etymology of BASILAR ANGLE
The etymology of the term "basilar angle" can be understood by breaking it down into its constituent parts: "basilar" and "angle".
1. Basilar: The adjective "basilar" comes from the Latin word "basis", meaning "base". It refers to something relating to, situated at, or forming the base.
2. Angle: The noun "angle" comes from the Latin word "angulus", meaning "corner" or "angle".
Therefore, the term "basilar angle" is used to describe an angle related to the base, particularly in anatomical contexts. It refers to the angle formed by the intersection of the base of the skull and the clivus (part of the occipital bone at the back of the skull).
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