Health Dictionary
Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.
Pterion
Introduction
Overview
Overview
The point corresponding with the posterior end of the sphenoparietal suture is named the pterion.
Location
Location
It is situated about 3 cm. behind, and a little above the level of the zygomatic process of the frontal bone.
It marks the junction between four bones:
- the parietal bone
- the temporal bone
- the sphenoid bone
- the frontal bone
Clinical significance
Clinical significance
The pterion is known as the weakest part of the skull.
Clinically, the pterion is relevant because the middle meningeal artery runs beneath it, on the inner side of the skull, which is quite thin at this point.
A blow to the pterion (e.g. in boxing) may rupture the artery causing an extradural haematoma.
Etymology
Etymology
The pterion receives its name from the Greek root pteron, meaning “wing”.
In Greek mythology, Hermes, messenger of the Gods, was enabled to fly by winged sandals, and wings on his head, which were attached at the pterion.
External links
External links
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