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Purpose: This study aimed to examine the anatomical variations and morphometric characteristics of the sulci in the dural venous sinuses within the intracranial cavity, with a particular focus on sex differences and asymmetry., Methods: Thirty fixed cadaveric heads were used to measure the dimensions (length, width, and depth) and spatial relationships of the dural venous sinus sulci within the intracranial cavity, including the distance to the midline, distance to each other, and lateral margin of the skull. Comparisons were made between sexes and sides of the body., Results: A significant difference was observed in the length of the marginal sinus on the right side between sexes (p = 0.028). Various measurements, including the width of the transverse sinus, origin and insertion sites of the superior petrosal sinus, and distances between the sinuses and midline, showed statistically significant differences between the left and right sides (p < 0.05). Furthermore, the width of the inferior petrosal sinus and depth of the sigmoid sinus were notably higher on the right side (p < 0.05)., Conclusion: The results suggest an asymmetric distribution of the sigmoid, superior/inferior petrosal, and transverse sinuses in terms of diameter and distance from the midline. Surgeons should consider these anatomical variations during procedures in this region., Competing Interests: Declarations. Ethical approval: All procedures conducted in this study involving human participants adhered to the ethical standards of the Bahcesehir University Clinical Research Ethics Committee, as approved by the ethics committee of the Bahcesehir University Faculty of Medicine (protocol ID: 2022-17/02 and approval date: November 16, 2022), and were in accordance with the 1964 Helsinki Declaration and its subsequent amendments or comparable ethical standards. Consent to participate: Not applicable. Consent to publish: Not applicable. Informed consent: Not applicable. Statement of research involving human participants and animals: The study was approved by the Bahcesehir University Clinical Research Ethics Committeeand certify that the study was performed in accordance with the ethical standards as laid down in the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards. Conflicts of interest: The authors declare that they have no conflicts of interest., (© 2024. The Author(s), under exclusive licence to Springer-Verlag France SAS, part of Springer Nature.)

Purpose: Our study aims to investigate three parts of the intracranial cavity, their distances to essential anatomical landmarks, and the correlations between these distances with sex, laterality, and surgical significance., Methods: The cranial nerve foraminae and essential surgical landmarks of each fossa were investigated bilaterally in 30 adult formalin-fixed cadaveric heads. Measurements, including lengths, depths, diameters, and horizontal distances to each other, to the midline of the skull, and to the outer lateral margin of the skull, were recorded on both sides., Results: The optic canal (OC) depth, internal auditory meatus (IAM) width, CNVII and CNIX diameters, and accessory hypoglossal canal (HC) distance were significantly greater on the left side (p < 0.05). CNVI length, CNV diameter, CNXI length, and the distances of the HC and accessory HC from the skull were significantly greater on the right side (p < 0.05). In males, correlations were found between the length of the left CNVIII and the right IAM diameter (r = 0.864, p = 0.001), right CNVIII length (r = 0.709, p = 0.022), right accessory HC length (r = 0.847, p = 0.016), and right-sided skull distance (r = 0.829, p = 0.042). In females, correlations were noted between IAM depth and length, right IAM location relative to the skull, left CNIX and CNX lengths, left CNXII length, left accessory HC location relative to the skull, and accessory HC length., Conclusions: The findings of the current study indicate inherent asymmetry, sexual dimorphism, and variability in certain cranial nerves among cadaveric heads, which could have implications for surgical procedures, neuroanatomical studies, and clinical assessments. The study revealed side disparities and correlations within cranial fossa formations and essential surgical landmarks in both genders., (© 2024. The Author(s), under exclusive licence to Springer-Verlag France SAS, part of Springer Nature.)