https://www.ijmhr.org/ijar.htm editor_anatomy@ijmhr.org
ISSN:       2321-4281 (E) 2321-8967 (P)

IJAR.2018.269

DOWNLOAD PDF
Table of Contents

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

A CADAVERIC STUDY OF THE INTERNAL OCCIPITAL CREST AND VERMIAN FOSSA WITH ITS CLINICAL SIGNIFICANCE

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

ABSTRACT:

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.

REFERENCES

  1. Standring S. Gray’s Anatomy, The Anatomical Basis of Clinical Practice. 39th ed. Elsevier: Churchill Livingstone; 2005: 353, 463-464.
  2. Poddar S, Bhagat A. Handbook of osteology, 12th Patna: Scientific Book Co; 2007:43.
  3. Bergman RA, Thompson SA, Afifi AK, Saadeh FA. Compendium of human anatomic variation. Urban & Schwarzenberg; 1988: 200.
  4. Soto-Ares G, Delmaire C, Deries B, Vallee L, Pruvo JP. Cerebellar cortical dysplasia: MR findings in a complex entity. AmJ Neuroradiol. 2000;21(8):1511-1519.
  5. Pozzati E, Piazza GC, Galassi E, Gaist G. Anomalous internal occipital crest causing hydrocephalus. Case report. J Neurosurg Sci. 1979;23(1): 87–90, 1979.
  6. Robertson EG. Developmental defects of the cisterna magna and dura mater. J Neurol Neurosurg Psychiatry. 1949;12(1):39–51, 1949.
  7. D’Costa S, Krishnamurthy A, Nayak SR, Madhyasta S, Prabhu LV, Jiji P, Ranade AV, Pai MM, Vadgaonkar R, Ganesh Kumar C, Rai R. 2009. Duplication of falx cerebelli, occipital sinus, and internal occipital crest. Rom J Morphol Embryol. 2009;50(1):107-10.
  8. Lang J. Clinical anatomy of the posterior cranial fossa and its foramina. New York: Thieme; 1991:6.
  9. East CFT. A rare abnormality of the occipital bone. J Anat. 1926;60:416-417.
  10. Berge JK, Bergman RA. Variations in size and symmetry of the foramina of the human skull. Clin. Anat. 2001;14:406-413.
  11. Kale A, Ozturk A, Aksu F, Taskara N, Bayraktar B, Gurses I.A, Zeybek F.G, Gayretli O. Vermian fossa – an anatomical study. J Ist Faculty Med. 2008;71:106-108.
  12. Cireli E, Ozturk L, Yurtseven M, Baflalo.lu K. Protuberantia occipitalis interna olgesindeki sulkuslar›n incelenmesi veFossa Vermiana. Ege T›p Dergisi. 1990;29:793-796.
  13. Murlimanju BV, Prabhu LV, Sharmada KL, Saralaya VV, Pai MM, Kumar CG, Jiji PJ, Dhananjaya KVN. Morphological and morphometricstudy of the vermian fossain Indian human adult skulls. J.Morphol Sci. 2010;30(3):148-151.
  14. Arvind Yadav, Ketu Chauhan, GL Nigam, Archana Sharma, Anjoo Yadav. Morphological and Morphometrical Analysis of the Vermian Fossa in Dry Adult Skulls of Western Uttar Pradesh Population: An Osteological Study. Int J Anat Res. 2014;2(3):478-80.
  15. Elze C, Braus H. Anatomie des Menschen. Band I. Berlin: Springer-Verlag; 1954:642-643.
  16. Hashimoto T, Tayama M, Miyazaki M, Murakawa K, Kuroda V. Brainstem and cerebellar vermis involvement in autistic children. J Child Neurol. 1993;8(2):149-153.
  17. Siebert JR. A pathological approach to anomalies of the posterior fossa. Birth DefectsRes A Clin Mol Teratol.2006;76(9):674-684.
  18. Shoja MM., Tubbs RS, Khaki AA, Shokouhi G. A rare variation of the posterior cranial fossa: duplicated falx cerebelli, occipital venous sinus and internal occipital crest. Folia Morphol. 2006;65(2):171-173.

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