Research Article

Hidden bridges of the cranium: anatomical foundations of clinical challenges

Volume: 9 Number: 2 March 12, 2026

Hidden bridges of the cranium: anatomical foundations of clinical challenges

Abstract

Aims: This study aimed to evaluate the frequency, laterality, morphology, and coexistence of clinically relevant cranial bony bridges (interclinoid bridge, caroticoclinoid bridge, pterygospinous bridge and pterygoalar bridge ) in dry human skulls. Methods: Forty adult dry human skulls of unknown age and sex were examined. Only specimens allowing visualization of the sphenoid bone were included. The presence and morphology of the caroticoclinoid foramen (CCF), interclinoid foramen (ICF), pterygospinous bridge, and pterygoalar bridge were assessed. Variants were classified according to completeness, laterality, and associated spicules, and all findings were documented photographically. Results: Examination of 40 skulls identified infrequent sphenoidal bony bridges: one specimen showed bilateral complete caroticoclinoid foramina concomitant with bilateral interclinoid foramina, without spicular components. Unilateral pterygospinous bridging occurred in two skulls on opposite sides, whereas pterygoalar bridges were not observed. Conclusion: Cranial bony bridges represent clinically relevant anatomical variants that warrant careful consideration during diagnostic evaluation, particularly in patients presenting with atypical or unexplained neurological symptoms. Recognition of these variations is essential for preoperative planning, as their presence may increase the risk of neurovascular injury and intraoperative complications. A thorough understanding of the incidence and clinical implications of cranial bony bridges, as demonstrated in our laboratory observations and supported by the existing literature, is therefore critical for optimizing diagnostic accuracy and ensuring safe and effective surgical management.

Keywords

Supporting Institution

No financial support was received from any public institution, private sector, or non-profit organization within the scope of this research.

Ethical Statement

Ankara Yıldırım Beyazıt Üniversitesi Tıp Fakültesi Etik Kurulu 20.11.2025 tarihli toplantı 09/1517 nolu kararla etik onay alınmıştır.

References

  1. Das S, Suri R, Kapur V. Ossification of caroticoclinoid ligament and its clinical importance in skull-based surgery. Sao Paulo Med J. 2007;125(6): 351-353. doi: 10.1590/s1516-31802007000600009
  2. Priya A, Narayan RK, Ghosh SK, Kumar PJ. Morphometry and morphological analysis of carotico-clinoid foramen: an anatomical study with clinical implications. Folia Morphologica. 2023;82(1):108-118. doi: 10.5603/FM.a2021.0128
  3. Bansode SA, Devadas P, Vinila BHS. Study on the ıncidence of the carotico-clinoid foramen in the South Indian dry adult skulls: a cross-sectional study. Int J Anat Res. 2017;5(3.1):4051-4055. doi:10.16965/ijar. 2017.247
  4. Tayebi Meybodi A, Mignucci-Jiménez G, Lawton MT, Liu JK, Preul MC, Sun H. Comprehensive microsurgical anatomy of the middle cranial fossa: part I-osseous and meningeal anatomy. Front Surg. 2023;10: 1132774. doi: 10.3389/fsurg.2023.1132774
  5. Cederberg RA, Benson BW, Nunn M, English JD. Calcification of the interclinoid and petroclinoid ligaments of sella turcica: a radiographic study of the prevalence. Orthod Craniofac Res. 2003;6(4):227-232. doi: 10.1034/j.1600-0544.2003.00243.x
  6. Fernandez-Miranda JC, Tormenti M, Latorre F, Gardner P, Snyderman C. Endoscopic endonasal middle clinoidectomy: anatomic, radiological, and technical note. Neurosurgery. 2012;71(2 Suppl Operative):ons 233-239. doi:10.1227/NEU.0b013e3182690b6b
  7. Muthukumar V, Nanjundaiah K, Shetty S. Study of carotico clinoid foramen in dry human skulls. Int J Anat Res. 2017;5(4.2):4630-4634. doi: 10.16965/ijar.2017.425
  8. Ryu SJ, Park MK, Lee UY, Kwak HH. Incidence of pterygospinous and pterygoalar bridges in dried skulls of Koreans. Anat Cell Biol. 2016;49(2): 143-150. doi: 10.5115/acb.2016.49.2.143

Details

Primary Language

English

Subjects

Central Nervous System

Journal Section

Research Article

Publication Date

March 12, 2026

Submission Date

January 11, 2026

Acceptance Date

February 28, 2026

Published in Issue

Year 2026 Volume: 9 Number: 2

APA
Öztürk, P., Oğuz, B., & Akkaşoğlu Taş, S. (2026). Hidden bridges of the cranium: anatomical foundations of clinical challenges. Journal of Health Sciences and Medicine, 9(2), 499-503. https://doi.org/10.32322/jhsm.1860844
AMA
1.Öztürk P, Oğuz B, Akkaşoğlu Taş S. Hidden bridges of the cranium: anatomical foundations of clinical challenges. J Health Sci Med / JHSM. 2026;9(2):499-503. doi:10.32322/jhsm.1860844
Chicago
Öztürk, Pınar, Buket Oğuz, and Sinem Akkaşoğlu Taş. 2026. “Hidden Bridges of the Cranium: Anatomical Foundations of Clinical Challenges”. Journal of Health Sciences and Medicine 9 (2): 499-503. https://doi.org/10.32322/jhsm.1860844.
EndNote
Öztürk P, Oğuz B, Akkaşoğlu Taş S (March 1, 2026) Hidden bridges of the cranium: anatomical foundations of clinical challenges. Journal of Health Sciences and Medicine 9 2 499–503.
IEEE
[1]P. Öztürk, B. Oğuz, and S. Akkaşoğlu Taş, “Hidden bridges of the cranium: anatomical foundations of clinical challenges”, J Health Sci Med / JHSM, vol. 9, no. 2, pp. 499–503, Mar. 2026, doi: 10.32322/jhsm.1860844.
ISNAD
Öztürk, Pınar - Oğuz, Buket - Akkaşoğlu Taş, Sinem. “Hidden Bridges of the Cranium: Anatomical Foundations of Clinical Challenges”. Journal of Health Sciences and Medicine 9/2 (March 1, 2026): 499-503. https://doi.org/10.32322/jhsm.1860844.
JAMA
1.Öztürk P, Oğuz B, Akkaşoğlu Taş S. Hidden bridges of the cranium: anatomical foundations of clinical challenges. J Health Sci Med / JHSM. 2026;9:499–503.
MLA
Öztürk, Pınar, et al. “Hidden Bridges of the Cranium: Anatomical Foundations of Clinical Challenges”. Journal of Health Sciences and Medicine, vol. 9, no. 2, Mar. 2026, pp. 499-03, doi:10.32322/jhsm.1860844.
Vancouver
1.Pınar Öztürk, Buket Oğuz, Sinem Akkaşoğlu Taş. Hidden bridges of the cranium: anatomical foundations of clinical challenges. J Health Sci Med / JHSM. 2026 Mar. 1;9(2):499-503. doi:10.32322/jhsm.1860844

Interuniversity Board (UAK) Equivalency: Article published in Ulakbim TR Index journal [10 POINTS], and Article published in other (excuding 1a, b, c) international indexed journal (1d) [5 POINTS].

The Directories (indexes) and Platforms we are included in are at the bottom of the page.

Note: Our journal is not WOS indexed and therefore is not classified as Q.

You can download Council of Higher Education (CoHG) [Yüksek Öğretim Kurumu (YÖK)] Criteria) decisions about predatory/questionable journals and the author's clarification text and journal charge policy from your browser. https://dergipark.org.tr/tr/journal/2316/file/4905/show







The indexes of the journal are ULAKBİM TR Dizin, ICI World of Journals, DOAJ, Directory of Research Journals Indexing (DRJI), General Impact Factor, ASOS Index, WorldCat (OCLC), MIAR, OpenAIRE, Türkiye Citation Index, Türk Medline Index, InfoBase Index, Scilit, etc.

       images?q=tbn:ANd9GcRB9r6zRLDl0Pz7om2DQkiTQXqDtuq64Eb1Qg&usqp=CAU

500px-WorldCat_logo.svg.png

atifdizini.png

logo_world_of_journals_no_margin.png

images?q=tbn%3AANd9GcTNpvUjQ4Ffc6uQBqMQrqYMR53c7bRqD9rohCINkko0Y1a_hPSn&usqp=CAU

doaj.png  

images?q=tbn:ANd9GcSpOQFsFv3RdX0lIQJC3SwkFIA-CceHin_ujli_JrqBy3A32A_Tx_oMoIZn96EcrpLwTQg&usqp=CAU

ici2.png

asos-index.png

drji.png





The platforms of the journal are Google Scholar, CrossRef (DOI), ResearchBib, Open Access, COPE, ICMJE, NCBI, ORCID, Creative Commons, etc.

COPE-logo-300x199.jpgimages?q=tbn:ANd9GcQR6_qdgvxMP9owgnYzJ1M6CS_XzR_d7orTjA&usqp=CAU

icmje_1_orig.png

cc.logo.large.png

ncbi.pngimages?q=tbn:ANd9GcRBcJw8ia8S9TI4Fun5vj3HPzEcEKIvF_jtnw&usqp=CAU

ORCID_logo.png

1*mvsP194Golg0Dmo2rjJ-oQ.jpeg


Our Journal using the DergiPark system indexed are;

Ulakbim TR Dizin,  Index Copernicus, ICI World of JournalsDirectory of Research Journals Indexing (DRJI), General Impact FactorASOS Index, OpenAIRE, MIAR,  EuroPub, WorldCat (OCLC)DOAJ,  Türkiye Citation Index, Türk Medline Index, InfoBase Index


Our Journal using the DergiPark system platforms are;

Google, Google Scholar, CrossRef (DOI), ResearchBib, ICJME, COPE, NCBI, ORCID, Creative Commons, Open Access, and etc.


Journal articles are evaluated as "Double-Blind Peer Review". 

Our journal has adopted the Open Access Policy and articles in JHSM are Open Access and fully comply with Open Access instructions. All articles in the system can be accessed and read without a journal user.  https//dergipark.org.tr/tr/pub/jhsm/page/9535

Journal charge policy   https://dergipark.org.tr/tr/pub/jhsm/page/10912

Our journal has been indexed in DOAJ as of May 18, 2020.

Our journal has been indexed in TR-Dizin as of March 12, 2021.


17873

Articles published in Journal of Health Sciences and Medicine have open access and are licensed under the Creative Commons CC BY-NC-ND 4.0 International License.