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Updated: Aug 15, 2026
09:53
2D and 3D Echocardiography in the Axolotl (Ambystoma Mexicanum)
Published on: November 29, 2018
[Topographic anatomy of the asterion]
F Martinez1, A Laxague, L Vida
1Facultad de Medicina y Hospital de Clínicas Dr. Manuel Quintela. Montevideo. Uruguay.
Neurocirugia (Asturias, Spain)
|November 9, 2005
Summary
The asterion landmark is crucial for locating the transverse-sigmoid sinus (TS-SS) complex during posterior fossa surgery. Optimal burr hole placement for posterolateral approaches is below and behind the asterion.
Area of Science:
- Anatomy
- Neurosurgery
- Surgical Landmark Identification
Context:
- Posterior fossa surgeries require precise anatomical localization.
- The transverse-sigmoid sinus (TS-SS) complex is a critical structure in this region.
- The asterion has been proposed as a surface landmark for TS-SS localization.
Purpose:
- To investigate the anatomical relationship between the asterion and the transverse-sigmoid sinus (TS-SS) complex.
- To evaluate the reliability of the asterion as a landmark for surgical approaches to the posterior fossa.
- To determine the optimal placement of burr holes for posterolateral approaches based on the asterion.
Summary:
- This study examined 25 adult cadaveric skulls to assess the relationship between the asterion and the TS-SS complex.
- The asterion was located superior to the TS-SS complex in 87.8% of cases.
- The mastoid emissary vein was also analyzed, found in 46 cases with 36% showing two veins.
Impact:
- Provides crucial anatomical data for neurosurgeons performing posterior fossa operations.
- Refines surgical planning by establishing the asterion as a reliable landmark for TS-SS complex identification.
- Contributes to improved safety and accuracy in posterolateral surgical approaches to the posterior fossa.
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