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Anatomic position of the asterion.
Neurosurgery 1998; 42(1):198-9N

Abstract

OBJECTIVE

The asterion is defined as the junction of the lambdoid, parietomastoid, and occipitomastoid sutures. The asterion has been used as a landmark in lateral approaches to the posterior fossa. However, its reliability as a landmark comes into question considering the apparent variability of its position. This study was performed to determine the reliability of the asterion as a surgical landmark.

METHODS

One hundred dried skulls were obtained for study. A 2-mm drill hole was placed at the asterion on each side. The position of the drill hole on the inner surface of the skull was next determined and recorded.

RESULTS

The asterion was located over the posterior fossa dura in 32% on the right and 25% on the left. Its position was over the transverse or sigmoid sinus complex in 61% on the right and 66% on the left. The landmark was located above the transverse-sigmoid sinus complex in 7% on the right and 9% on the left.

CONCLUSIONS

The asterion is not a strictly reliable landmark in terms of locating the underlying posterior fossa dura. Its location is very often directly over the transverse-sigmoid sinus complex. Burr holes placed at the asterion may often open the bone directly over the sinus, leading to potential damage.

Authors+Show Affiliations

Department of Neurosurgery, Lahey Hitchcock Medical Center, Burlington, Massachusetts, USA.No affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

9442525

Citation

Day, J D., and M Tschabitscher. "Anatomic Position of the Asterion." Neurosurgery, vol. 42, no. 1, 1998, pp. 198-9.
Day JD, Tschabitscher M. Anatomic position of the asterion. Neurosurgery. 1998;42(1):198-9.
Day, J. D., & Tschabitscher, M. (1998). Anatomic position of the asterion. Neurosurgery, 42(1), pp. 198-9.
Day JD, Tschabitscher M. Anatomic Position of the Asterion. Neurosurgery. 1998;42(1):198-9. PubMed PMID: 9442525.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Anatomic position of the asterion. AU - Day,J D, AU - Tschabitscher,M, PY - 1998/1/27/pubmed PY - 1998/1/27/medline PY - 1998/1/27/entrez SP - 198 EP - 9 JF - Neurosurgery JO - Neurosurgery VL - 42 IS - 1 N2 - OBJECTIVE: The asterion is defined as the junction of the lambdoid, parietomastoid, and occipitomastoid sutures. The asterion has been used as a landmark in lateral approaches to the posterior fossa. However, its reliability as a landmark comes into question considering the apparent variability of its position. This study was performed to determine the reliability of the asterion as a surgical landmark. METHODS: One hundred dried skulls were obtained for study. A 2-mm drill hole was placed at the asterion on each side. The position of the drill hole on the inner surface of the skull was next determined and recorded. RESULTS: The asterion was located over the posterior fossa dura in 32% on the right and 25% on the left. Its position was over the transverse or sigmoid sinus complex in 61% on the right and 66% on the left. The landmark was located above the transverse-sigmoid sinus complex in 7% on the right and 9% on the left. CONCLUSIONS: The asterion is not a strictly reliable landmark in terms of locating the underlying posterior fossa dura. Its location is very often directly over the transverse-sigmoid sinus complex. Burr holes placed at the asterion may often open the bone directly over the sinus, leading to potential damage. SN - 0148-396X UR - https://www.unboundmedicine.com/medline/citation/9442525/Anatomic_position_of_the_asterion_ L2 - https://academic.oup.com/neurosurgery/article-lookup/doi/10.1097/00006123-199801000-00045 DB - PRIME DP - Unbound Medicine ER -