Type of Article:  Original Research

Volume 6; Issue 3.2 (August 2018)

Page No.: 5520-5524

DOI: https://dx.doi.org/10.16965/ijar.2018.269


Arvind Kumar Pandey, Suhani Sumalatha, Sushma R Kotian *.

Department of Anatomy, Kasturba Medical College Manipal, Manipal Academy of Higher Education, Manipal, Karnataka, India.

Corresponding Author: Dr Sushma R Kotian, Assistant Professor, Department of Anatomy, Kasturba Medical College Manipal, Manipal Academy of Higher Education, Zip code: 576104, Manipal, India, Phone- +91-820-2922327 (Office), Fax- +91-820-2570061

E-Mail: sushma.rk@manipal.edu


Background: The anatomical variabilities of the internal occipital crest (IOC) and vermian fossa (VF) may influence the related dural venous sinuses and further effect the flow of the cerebrospinal fluid. It is also associated with the pathologies around the foramen magnum like Arnold Chiari malformation, certain cases of cerebellar cortical dysplasia.

Aim: The present study was designed to explore and evaluate the morphological and morphometric details of the IOC and VF.

Materials and Methods: The study was conducted on 40 adult cadavers (23 males & 17 females). The morphology and morphometry of IOC and VF were studied. Based on the observations, the VF was classified into five types: Type 1- classical (well defined fossa), Type II-short triangular, Type III- elongated triangular, Type IV-quadrangular and Type V-deviated.

Results:  The IOC was found to be variable both in terms of morphology and morphometry. The morphological observations included varied shapes, i.e., sharp (65%), blunt (30 %) and ill-defined (5 %). The length of the IOC was also variable with a mean length of 2.97 ± 0.16 cm. The mean width at upper, middle and lower levels were 0.9 ± 0.10 cm, 0.75 ± 0.17 cm, 1.10 ± 0.12 cm respectively.

The incidence of the VF was found to be about 80%.  The VF was classified into types based on its varied shape: classical (Type I ;56.25 %), short triangular (Type II ;21.87%), elongated triangular (Type III;12.5%) and quadrangular (Type 1V;6.25 %) respectively. In one specimen, the VF was deviated to the left side (type V ;3.12%). The mean length and width of the fossa were 1.67±0.34 cm and 1.80±0.34 cm respectively.

Conclusion: The present study on the morphology and morphometry of the IOC and the VF may serve as database and further help clinicians to improve the diagnosis and therapeutic performances in the posterior cranial fossa.

KEY WORDS: Internal occipital crest, vermian fossa, foramen magnum, morphology, morphometry.


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Cite this article: Arvind Kumar Pandey, Suhani Sumalatha, Sushma R Kotian. A CADAVERIC STUDY OF THE INTERNAL OCCIPITAL CREST AND VERMIAN FOSSA WITH ITS CLINICAL SIGNIFICANCE. Int J Anat Res 2018;6(3.2):5520-5524. DOI: 10.16965/ijar.2018.269