IJCRR - 8(4), February, 2016
SEXUAL DIMORPHISM OF MASTOID PROCESS IN DRIED SKULLS OF NORTH KARNATAKA POPULATION
Author: Rajendrakumar D. Virupaxi, Sanjay Kumar Yadav, Suresh P. Desai, Veereshkumar Shirol
Objectives: Morphometric and morphological study of the bones play an important role in determination of sex, age and identification of an individual and skull is the second important tool to pelvis in this regard. Mastoid process is a dimorphic bone situated at the basolateral region of the skull and remains least damaged due to its position. This study was an attempt to evaluate the use of mastoid process in the determination of sex. Methodology: This cross sectional study was carried out in the settings of Department of Anatomy and Forensic Medicine at North Karnataka for the period of one year from July 2014 to June 2015. A total of 100 complete undamaged dried skulls of known sex were used for the study, (50 male and 50 female skulls). Length of the mastoid process on both sides was recorded using the Frankfurt’s plane. Measurements were taken by using Vernier caliper. Results: The mean mastoid process length among males at right was 30.20 ± 2.64 mm and at left it was 30.70 ± 3.09 mm compared to 26.20 ± 2.57 mm in females at right and 26.20 ± 3.49 mm at left respectively. The difference observed was statistically significant (p<0.001). Conclusion: The mastoid length in females is significantly less compared to males at right as well as left.
Keywords: Mastoid process, Mastoid process length, Skull, Sexual dimorphism
Rajendrakumar D. Virupaxi, Sanjay Kumar Yadav, Suresh P. Desai, Veereshkumar Shirol. SEXUAL DIMORPHISM OF MASTOID PROCESS IN DRIED SKULLS OF NORTH KARNATAKA POPULATION International Journal of Current Research and Review. 8(4), February, 51-53
1. Bilge Y, Kedici PS, Alacoc YD, Ulkuer KU, Likyaz YY. The identification of a dismembered human body; A multidisciplinary approach. Forensic Sci Int 2003; 137(2-3):141-6.
2. Bayers SN. Introduction to Forensic Anthropology. Boston: Pearson Education; 2008.
3. Phenice TW. A newly developed visual method of sexing the os pubis. Am J Phys Anthropol 1969;30:297-301.
4. Saini V, Srivastava R, Rai RK, Shamal SN, Singh TB, Tripathi SK. Sex estimation from the mastoid process. Rev Hosp Clin Fac Med S Palo 2012;58(1):15-20.
5. Bass WM. Human Osteology; A Labortary, Field manual of the Human Skeleton. Columbia: Missouri Archeological Society; 1971.
6. Spradley MK, Jantz RL. Sex estimation in forensic anthropology: skull versus postcranial elements. J Forensic Sci 2011;56(2):289-96.
7. Bachman DL, Pickring RB. The use of Forensic Anthropology. Boca Raton, FL: CRC Press; 1977.
8. Nagoka T, Shizushima A, Sawada J, Tomo S, Hoshino K, Sato H, et al. Sex determination using mastoid process measurements: Standards for Japanese human skeletons of the medieval and early modern periods. Anthropology Sic 2008;116: 105.3.
9. Paiva LA, Segre M. Sexing the human skulls through the mastoid process. Rev Hosp Clin Fac Med 2003;58/1:15-20.
10. Passey J, Mishra SR, Singh R, Sushobhana K, Singh S, Sinha P. Sex determination using mastoid process. Asian J Med Sci 2015;6(6):93-5.
11. Hoshi H. Sex difference in the shape of the mastoid process in norma occipitalis and its importance to the sex determination of the human skull. Okajma’s Folia Ana Japonica 1962;38:309-17.
12. Giles F, Elliot U. Sex determination by discriminant function analysis of crania. Am J Phys Anthropol 1963;21:53-68.
13. Nidugala H, Avadhani R, Bhaskar B. Mastoid process- A tool for sex determination, an anatomical study in South Indian skulls. International J Biomed Res 2013;04(02): 106-10.
14. Dasgupta A, Banerjee A, Kumar A, Rao SR, Jose J. Discriminant Function Analysis of mastoid Measurements in sex determination. J Life Sci 2012;4(1):1-5.
15. Patnaik SVVG. Determination of sex from mastoid process by discriminant function analysis. J Anat So India 2010;59(2):222- 8.
16. Song HW, Lin ZQ, Jia JT. Sex diagnosis of Chinese skulls using multiple stepwise discrinant function analysis. Forensic Sci Int 1992;54(2);135-40.
17. Patil KR, Mody RN. Determination of sex by discriminant function analysis ans stature by regression analysis a lateral cephalometric study. Forensic Sci In 2005;147(2-3):175-80.