Anatomic position of the asterion in Kenyans for posterolateral surgical approaches to cranial cavity

Mwachaka, Philip Maseghe; Hassanali, J; Odula, Paul

doi:10.1002/ca.20888

Cited by 33 publications

(44 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In previous studies ıt has been found that the asterion is mostly located superficial to the STJ in adults (Gharabaghi et al, 2008a;Mwachaka et al;Srijit et al;Ribas et al).…”

Section: Asterion (A) Henle's Spine (Hs) External Occipital Protubementioning

confidence: 92%

“…Some authors reported that reliability of using asterion as a surface landmark remained debatable. However its location was indespensible to identify the STJ for a successful posterior approach surgery in cranial fossa Gharabaghi et al, 2008a;De Paiva & Segre;Mwachaka et al).…”

Section: Asterion (A) Henle's Spine (Hs) External Occipital Protubementioning

confidence: 99%

“…The asterion, one of the important surface landmark for approaches of the posterior cranial basis is defined as the junction point of parietomastoid and occipitomastoid sutures "Lambdoid", which coincides with the site of the posterolateral fontanella, in the neonatal skull which closes during the second year (Avci et al;Bonilla et al, 2012;Brockmeyer et al;Lang & Samii;Mwachaka et al, 2010;Rhoton, 1996;da Silva et al, 2010;Sripairojkul & Adultrakoon;Standring, 2008). It is accepted as the first landmark at combine petrosal approaches for the cranial basis, and as the respectable landmark for the duramater of posterior fossa lying under it Mwachaka et al;Sripairojkul & Adultrakoon;Tubbs et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…It is accepted as the first landmark at combine petrosal approaches for the cranial basis, and as the respectable landmark for the duramater of posterior fossa lying under it Mwachaka et al;Sripairojkul & Adultrakoon;Tubbs et al, 2009). But, its reliability has been put into question due to its population variability in position using external anatomical landmarks (Kemkes et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The Localization of the Asterion According to the Anatomical Landmarks of Posterior Cranial Fossa in Newborns: Clinical Implications

et al. 2015

View full text Add to dashboard Cite

SUMMARY:The purpose of this study was to determine the localization of the asterion according to the anatomical landmarks of posterior cranial fossa and its relation with sinuses for posterolateral surgical approaches in newborns. On 70 head-halves, a needle about 2 mm with diameter was placed on the centre point of asterion (posterolateral fontanel) by inserting into the whole cranial bony tissue by forming an right angle with the bony surface. Various localizations of asterion and its measurements from the internal and external anatomical landmarks were investigated on term neonatal cadavers. The localization of asterion was found as on the sigmoidtransverse sinus junction (STJ) (5., 6., 7., 8. squares) in 40% of cases on right side and in 34%, on left side. Additionally, it was located below the STJ (9., 10., 11., 12. squares) in 60% of cases, on right side and in 63% of cases on left side. We determined that the most frequent localization of asterion as the 11. square both for the right and left sides 12 (34%) cases for the right side and 11 (31,4%) cases for the left side. The asterion was not located on 1., 2., 3., 4., 5. and 12. squares on right side and 1., 3., 4., 8. and 9. squares on left side. It has been found that the region of asterion has an average distance value of 19.9 mm to internal acoustic meatus (MI), 31.7 mm to posterior clinoid process (PC), 34.4 to dorsum sellae (DS), 19.2 mm to jugular foramen (FJ), 23.0 mm to hypoglossal canal (HC), internally. The distance of asterion as 28.8 mm to zygoma root (ZR) and 22.3 mm to Henle's spine (HS) and 15.8 mm to mastoid tip (MT) and 35.9 mm to external occipital protuberance (PE) were observed. By the guide of point asterion on newborns the area of 1cm2 on this point which was placed on superior 4 squares of our scale diagram is suggested as a safe area of placement of first burr hole to avoid from the risk of bleeding of sigmoid and transverse sinuses on craniotomies of posterior fossa.

show abstract

“…In previous studies ıt has been found that the asterion is mostly located superficial to the STJ in adults (Gharabaghi et al, 2008a;Mwachaka et al;Srijit et al;Ribas et al).…”

Section: Asterion (A) Henle's Spine (Hs) External Occipital Protubementioning

confidence: 92%

Section: Asterion (A) Henle's Spine (Hs) External Occipital Protubementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Localization of the Asterion According to the Anatomical Landmarks of Posterior Cranial Fossa in Newborns: Clinical Implications

et al. 2015

View full text Add to dashboard Cite

show abstract

“…The position of the asterion was determined as being over the transverse-sigmoid sinus complex, above it (over supratentorial dura) or below it (over posterior fossa dura) (Figure 2A-C). Data obtained were analysed using the statistical package software (SPSS version 12.0, SPSS) (8). Side and gender differences were assessed by Student's t test.…”

Section: █ Introductionmentioning

confidence: 99%

Skull anatomic landmarks for retrosigmoid craniotomy in a chinese cohort: a 3D-CT study in vivo

Fan

Chen²,

Wang³

et al. 2013

Turkish Neurosurgery

View full text Add to dashboard Cite

ABSTRACTas a surgical landmark has been questioned (8). Recent advances in 3D-computed tomography (CT) volume rendering techniques have made it possible to visualize minute bone sutures and venous structures of the posterior fossa (3,5,6,11).The purpose of this study is to determine the anatomic position of the asterion and the transverse-sigmoid sinus junction in Chinese population using the root of the zygoma and the tip of the mastoid process as palpable points. We also tried to clarify the relationship between the asterion and the inferior aspect of the transverse-sigmoid sinus junction using a 3D-CT procedure in vivo (8). █ MATERIAL and METHODSThe Zhejiang University ethics committee approval to fulfill the █ INTRODUCTIONThe correct location of an initial strategic burr hole for a retrosigmoid craniotomy to give access to the cerebellopontine angle (CPA) is paramount in obtaining optimal exposure in this region (12).As the transverse and sigmoid sinuses are the natural limits of these exposures, a knowledge about their cranial topography constitutes the main factor in the planning of these retrosigmoid approaches (10). The asterion serves as the junction of the lambdoid, parietomastoid and occipitomastoid sutures, and has been used in retrosigmoid craniotomy to locate the transverse-sigmoid sinus junction (2, 9, 12-14).As cadaveric studies have shown considerable variability in the relationship of the asterion to the underlying venous structures and its population-specific variability, its validity AIM: This study was designed to determine the anatomic position of the asterion and the relationship between the asterion and the transverse sigmoid sinus junction (TSSJ) in a Chinese cohort. MATERIAL and METHODS:Venous computed tomography (CT) angiography was performed in 32 patients to simultaneously obtain 3D-CT volume rendering images of the cranial bone and the dural sinus. The relationship between the TSSJ and the asterion was analyzed. RESULTS:The distance from the asterion to root of zygoma (ROZ) was 54.6 ± 5.50 mm on the right side and 54.1 ± 5.42 mm on the left side. The asterion was 49.10 ± 3.56 mm above the tip of mastoid process (TOP) on the right side and 48.70 ± 2.23 mm on the left side. The asterion's position was at the junction of the transverse-sigmoid sinus complex in 44 cases, below it in 19 cases, and above it in one case.CONCLUSION: 3D-CT volume rendering imaging is capable of accurately and simultaneously visualizing the bony landmark and the dural sinus structure outline in vivo, thus offering a new option for anatomic research and morphometric investigation. The accurate location of asterion can be found using the root of the zygoma and the tip of the mastoid process.

show abstract

Evaluating sexual dimorphism in the human mastoid process: A viewpoint on the methodology

et al. 2015

View full text Add to dashboard Cite

The mastoid process is one of the most sexually dimorphic features in the human skull, and is therefore often used to identify the sex of skeletons. Numerous techniques for assessing variation in the size and shape of the mastoid process have been proposed and implemented in osteological research, but its complex form still presents difficulties for consistent and effective analysis. In this article, we compare the different techniques and variables that have been used to define, measure, and visually score sexual dimorphism in the mastoid process. We argue that the current protocols fail to capture the full morphological range of this bony projection, and suggest ways of improving and standardizing them, regarding both traditional and 3D-based approaches.

show abstract

Anatomic position of the asterion in Kenyans for posterolateral surgical approaches to cranial cavity

Cited by 33 publications

References 12 publications

The Localization of the Asterion According to the Anatomical Landmarks of Posterior Cranial Fossa in Newborns: Clinical Implications

The Localization of the Asterion According to the Anatomical Landmarks of Posterior Cranial Fossa in Newborns: Clinical Implications

Skull anatomic landmarks for retrosigmoid craniotomy in a chinese cohort: a 3D-CT study in vivo

Evaluating sexual dimorphism in the human mastoid process: A viewpoint on the methodology

Contact Info

Product

Resources

About