What is skull asterion?
The asterion is an anatomical landmark on the lateral aspect of the skull formed at the junction of the occipital bone, the temporal bone, and the parietal bone. Asterion is related to the transverse and sigmoid sinus internally. It signifies the site of closed mastoid fontanelle.
What sutures meet asterion?
The asterion is the junction on the side of the posteroinferior calvarium where three sutures meet:
- parietomastoid suture.
- occipitomastoid suture.
- lambdoid suture.
Which bones meet at pterion and asterion?
Anatomical terminology The pterion is the region where the frontal, parietal, temporal, and sphenoid bones join together.
What are Craniometric points used for?
Craniometric points (CPs) have been used in neurosciences since the 1800s. Localization of the CPs allows for the identification of crucial intracranial structures.
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.
Where is pterion located?
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].
What are Craniometric points?
1. craniometric point – a landmark on the skull from which craniometric measurements can be taken. landmark – an anatomical structure used as a point of origin in locating other anatomical structures (as in surgery) or as point from which measurements can be taken.
What was Asterion the god of?
In Greek mythology, Asterion (/əˈstɪəriən/; Ancient Greek: Ἀστερίων, gen.: Ἀστερίωνος, literally “starry”) was a river-god of Argos.
How is the pterional craniotomy used in neurosurgery?
The pterional craniotomy is a unique approach that provides wide access to the skull base. It is named after the pterion, the junction point of 4 bones within the skull (frontal, temporal, greater wing of sphenoid, parietal) and is considered a fundamental tool in the armamentarium of the neurosurgeon.
What are the different types of frontotemporal craniotomies?
Other frontotemporal craniotomies derived from the pterional 2) 3) and supraorbital 4) craniotomies, as are the combined epi- and subdural approach with anterior clinoid removal 5) 6) and the orbitozygomatic extension of the pterional craniotomy 7) 8) .
How is the pterional approach used in neurosurgery?
Pterional approach (neurosurgery) The pterional or fronto-temporo-sphenoidal approach is one of the most frequently performed neurocranial craniotomy / craniectomy approaches and allows access to numerous important supratentorial anatomical substrates of vascular and neoplastic pathology.
How is the pterional craniotomy used to clip an aneurysm?
The pterional craniotomy is well established for microsurgical clipping of most anterior circulation aneurysms. The incision and temporalis muscle dissection impacts postoperative recovery and cosmetic outcomes.