Which 4 bones come together at the pterion?
The pterion is the H-shaped formation of sutures on the side of the calvarium representing the junction of four skull bones:
- the greater wing of the sphenoid bone.
- squamous portion of the temporal bone.
- frontal bone.
- parietal bone.
Which bones articulate at the pterion?
Tags. Posterior view of the temporal fossa and pterion. At the anterior edge of the squamosal suture, the articulation between the squamous temporal bone and the parietal bone, is the pterion.
Which of the following bones converge at the pterion?
The pterion is the region where the frontal, parietal, temporal, and sphenoid bones join. It is located on the side of the skull, just behind the temple….
| Pterion | |
|---|---|
| TA2 | 421 |
| FMA | 264720 |
| Anatomical terminology |
For what structure is the pterion used as a landmark?
The pterion which marks the union of 4 bones of the cranium is located superior to the zygomatic arch and posterior to the frontozygomatic suture. It is an important neurosurgical landmark for the lateral/pterional approach and has racial differences in both its location and pattern of union of the bones.
What is the pterion made of?
Pterion is the name given to the region on the lateral aspect of the skull where four bones are joined: Parietal bone. Squamous part of temporal bone. Front bone.
What is the pterion formed by?
Objective: Pterion is an area formed by the union of frontal, parietal, temporal, and sphenoid bones. It exhibits variations in the sutural pattern of fusion of constituent bones. Basing on this, the pterion can be classified into four varieties.
What lies deep pterion?
The pterion is known as ‘the danger area’ on the skull for head injuries. This is because the bone is thin at this site and is grooved by vessels on its internal surface (or may even lie in a bony tunnel here). It is the anterior branch of the middle meningeal artery (and vein) that lies deep to the pterion.
Which of these bones does not contribute to the region known as the pterion?
24 Cards in this Set
| The skull consists of _____ cranial bones and _____ facial bones. | 8,14 |
|---|---|
| which of these bones does not contribute to the region known as the pterion | Occipital |
| which bones form the calvaria | occipital, parietal, and frontal |
| of the four largest types of sutures in the skull, which are paired | squamous only |
Which of the following bones fuse together to help form the pterion?
There are four bones of the skull that come together to form the pterion: the frontal bone, the parietal bone, the greater wing of the sphenoid bone and the squamous part of the temporal bone.
Does the zygomatic bone forms part of pterion?
In general, the pterion is considered to be located two finger-breadths above the zygomatic arch and a thumb width posterior to the frontal process of the zygomatic bone [1-2].
Why is pterion clinically important?
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.
What sutures meet pterion?
The pterion is a craniometric point near the sphenoid fontanelle of the skull. It is a point of convergence of the sutures between the frontal, sphenoid, parietal, and squamous temporal bones [1]. There are varied patterns of articulation of these bones and sometimes a small epipteric bone may be present.
What sutures make the pterion?
Pterion involves three cranial sutures:
- Sphenoparietal suture.
- Coronal suture.
- Squamous suture.
Why is pterion clinically significant?
What forms the union asterion pterion?
Objective: Pterion is an area formed by the union of frontal, parietal, temporal, and sphenoid bones. It exhibits variations in the sutural pattern of fusion of constituent bones.
What is asterion and pterion?
The pterion and asterion are at the outer surface of the skull. The pterion is the region where the frontal, sphenoid, parietal and temporal bones join together, and the asterion is the intersection of parietal, temporal and occipital bones. The sutural pattern of both are different in the various population and races.
Where is the pterion located in the skull?
The pterion is located in the temporal fossa, approximately 2.6 cm behind and 1.3 cm above the posterolateral margin of the frontozygomatic suture. It is the junction between four bones: the parietal bone. the squamous part of temporal bone. the greater wing of sphenoid bone. the frontal bone.
What is the structure of the pterion?
Structure. The pterion is located in the temporal fossa, approximately 2.6 cm behind and 1.3 cm above the posterolateral margin of the frontozygomatic suture. It is the junction between four bones:
What is the pterion of the cranium?
The pterion which marks the union of 4 bones of the cranium is located superior to the zygomatic arch and posterior to the frontozygomatic suture. It is an important neurosurgical landmark for the lateral/pterional approach and has racial differences in both its location and pattern of union of the bones.
What is the difference between pterion and Asterion?
The pterion is the H-shaped formation of sutures on the side of the calvarium representing the junction of four skull bones: It is located at the anterior end of the s quamous suture, whereas the asterion is located at the posterior end.