Location and borders
The superciliary arches are located on the external surface of the skull (Facies externa). Their prominence can vary.
Topographic landmarks:
- Supraorbital margin (Margo supraorbitalis) — the inferior boundary of the external surface of the skull; the superciliary arches are located superior to this margin.
- Glabella (Glabella) — identified along the midline above the root of the nose.
- Frontal tubers (Tubera frontales / Eminentiae frontales) — frontal prominences.
Clinical significance: trauma and purulent processes
The superciliary arches are a zone where complications of burns and facial furuncles are described:
- Thermal burns: In deep burns, a thin scar forms at the site of the eyebrows, which increases ectropion of the upper eyelid. Hair growth on the affected arches does not resume.
- Furuncles: The superciliary arches are typical localization sites for facial furuncles. In a malignant course, severe headache and high fever are possible. Infection can spread via the facial veins into the ophthalmic vein, and further into the cavernous sinus (sinus cavernosus), leading to purulent meningitis.
Role in obstetrical diagnostics
In extension presentations of the fetal head, the superciliary arches serve as a landmark during vaginal examination:
- Brow presentation: On one side of the frontal suture, the bridge of the nose, superciliary arches, and orbits are palpated; on the other side, the anterior fontanelle is identified.
- Face presentation: The chin, mouth, nose, and superciliary arches are identified. The examination must be extremely careful to avoid damaging the fetal eyes.
Significance in infectious diseases
The superciliary arches are mentioned when describing symptoms of influenza and microbiological diagnostics:
- Influenza: In intoxication syndrome and fever, severe headache may be localized in the area of the superciliary arches, as well as in the frontotemporal, parietal, and retroorbital regions.
- Microbiological diagnostics: The superciliary arches are among the sites from which scrapings are taken when investigating infections caused by irregular Gram-positive bacilli. The material is examined bacterioscopically and stained using the Ziehl-Neelsen technique to detect acid-fast bacteria.
Evolutionary morphology
The prominence of the superciliary arches is described as a craniological landmark in paleontology:
- In Aegyptopithecus (about 30 million years ago), the superciliary arches were weakly developed.
- In Australopithecus, the superciliary region projected forward.
- In archanthropes (Pithecanthropus, Sinanthropus, Homo heidelbergensis), the supraorbital ridges were pronounced against a backdrop of a low skull and very thick bones.
- In paleoanthropists (Neandertals), the superciliary arches were strongly developed; the forehead is low and sloping.
Class and exam questions
How do deep burns of the superciliary arches affect the eyelids?
In deep burns, a thin scar forms at the site of the eyebrows, which increases ectropion of the upper eyelid. Hair growth does not resume.
Why are furuncles in the area of the superciliary arches considered dangerous?
In a malignant course of a facial furuncle, the infection can spread through the facial veins into the ophthalmic vein, and then into the cavernous sinus, causing purulent meningitis.
In which fetal presentations are the superciliary arches palpated?
They are identified during vaginal examination in brow presentation along with the bridge of the nose and orbits at one end of the frontal suture, as well as in face presentation along with the chin, mouth, and nose.
What else to study on this topic
- Supraorbital margin (Margo supraorbitalis)
- Glabella (Glabella)
- Frontal tubers (Tubera frontales)
- Fetal face presentation
- Facial furuncle
Study the complete topic in the Anatomy course
This is a summary. The course covers everything tested in classes and exams.
- Complete study guide on "Superciliary arches" and 1,363 other subject pages
- Assignments and quizzes after every topic — just like in a colloquium
- AI tutor answers questions on the topic anytime
- 295 video lessons by subject
Free video lessons: AnatomyShort lessons with study notes — no registration required.
Prepared by WhiteCoat Pro faculty in accordance with the medical school curriculum. For educational purposes only.