Sex determination in North Indian population using Inion– Opistocranium –Asterion (IOA) triangle–A research study.

Dr. Gopal Gupta; Dr. Manisha B. Sinha; Dr. Piyush Kumar

Volume : IX, Issue : V, May - 2019

Sex determination in North Indian population using Inion– Opistocranium –Asterion (IOA) triangle–A research study.

Dr. Gopal Gupta, Dr. Manisha B. Sinha, Dr. Piyush Kumar

Abstract :

Introduction: Sex determination is one of important parameters in identification of an individual. Skull is one of the most studied bone in physical anthropometry not only to determine sex but also to study race, age and evolutionary sequence. Materials and Methods: A total of 80 dry adult skulls (55 male and 25 female) was used in this study. Parameters measured were Asterion– Opistocranium (AO) length. Asterion–Inion(AI) length, Inion– Opistocranium (IO) length and the area of the IOA triangle for every skull on both sides. Result: The sexual dimorphism ratio for the mean measurements were >1 indicating that the male crania were larger in all linear dimensions. Sexual dimorphism ratio for area of IOA triangle was highest (1.55) making it the most sexually dimorphic parameter; among linear parameters sexual dimorphism ratio for IO was highest (1.40). Conclusions: Sexual dimorphism exists for the evaluated parameters. The anthropometric measurement of IOA triangle can be of additive value in sex determination of unknown skull. Area of IOA triangle is more reliable tool for sex determination in comparison to linear parameters