Background: This study was aimed at investigating sexual dimorphism in the axial triradii of the Igbo ethnic group. The study was descriptive cross-sectional in which the volunteers were aged between 18 to 60 years. For the purpose of this study, an individual was considered to be a Nigeria of Bini ethnic origin if the parents and four grandparents were all Bini.

 

Materials and methods: The purposive sampling method was used for the study. A written informed consent was signed and dated by the proposed respondents prior to the collection of data. A total of 400 subjects (225 males, 175 females) were recruited for the study. The fingerprints were obtained using a print scanner (Hp G3110 Photo scanner).

 

Results and discussion: The distribution of axial triradii in the Bini ethnic group showed that the males had on the right the t triradii 113(50.2%), t1 68(30.2%), t2 44(19.6%) whereas on the left were the following t 111(49.3%), t1 68(30.2%) and t2 46(20.5%). The females had the following prevalence of the triradii on the right: t 79(45.1%), t1 62(35.4%), t2 34(19.5%) while on the left t was 76(43.4%), t1 63(36.0%) and t2 36(20.6%). The total prevalence of the triradii for Bini ethnic group were thus for the right: t 192(48.0%), t1 130(30.3%), t2 78(19.5%) while on the left thus t 187(46.8%), t1 131(32.8%) and t2 82(20.4%).

 

Conclusion: The prevalence of the position of the axial triradii of the Bini ethnic group has shown that they high prevalence of position t and least prevalence of t2 position. This may serve as a baseline data for the Bini people of Southern Nigeria.