Type of Article:  Original Research

Volume 7; Issue 2.3 (June 2019)

Page No.: 6685-6689

DOI: https://dx.doi.org/10.16965/ijar.2019.208


Omotoso Dayo Rotimi *1, Baxter-Grillo Dorothea 2, Adagboyin Osa 3, Bienonwu Emmanuel 4.

*1 Lecturer, Department of Anatomy, College of Health Sciences, Igbinedion University, Okada, Edo State, Nigeria.

2  Professor, Department of Anatomy, College of Medicine, University of Benin, Benin City, Nigeria.

3 Lecturer, Department of Anatomy, College of Health Sciences, Igbinedion University, Okada, Edo State, Nigeria.

4 Lecturer, Department of Anatomy, College of Health Sciences, Igbinedion University, Okada, Edo State, Nigeria.

Address for Correspondence: Omotoso Dayo Rotimi, Department of Anatomy, College of Health Sciences, Igbinedion University, Okada, Edo State, Nigeria. Phone: +2348034779886 E-Mail: dayohmts@gmail.com


Background and Objective: In cephalometry, parameters like the head length, head width and cephalic index are very important in the description of human morphology, variation in different gender and races of human population and making comparison between healthy individuals and clinical patients.  Furthermore, they can also be used to categorize human head morphology into different types and to make comparative study of different human populations.  This comparative study was carried out to describe the cranial morphology among adolescent and young adult individuals of Bini and Igbo ethnic groups in Nigeria.

Methodology: This study involved 260 Bini and 245 Igbo subjects between ages 11 – 25 years.  The head length of each subject was measured between the glabella and inion while the head breadth measured between the parietal prominences using spreading and sliding calipers.  The cephalic index of each subject was calculated as the ratio of the head breadth to it length expressed as a percentage

Results: The mean cephalic indices among the two tribes were higher in males than in females in all the age groups studied. With increasing age, the cephalic index value decreases among the Bini tribe but increases among the Igbo tribe.  Based on the morphological classification of the cephalic index values, the brachycephalic head type was the most prevalent among both Bini (55.4%) and Igbo (66.9) tribes while the least common head type among the Bini and Igbo tribes were hyperbrachycephalic (8.1%) and dolicephalic (0.4%) respectively.

Conclusion: The cephalic index demonstrated inter-tribal variation, prominent intra-tribal sexual dimorphism and brachycephalization is the dominant trend in cranial morphology of both Bini and Igbo tribes in Nigeria.

Key word: Cephalic Index, Bini Tribe, Igbo Tribe, Nigeria.


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Cite this article: Omotoso Dayo Rotimi, Baxter-Grillo Dorothea, Adagboyin Osa, Bienonwu Emmanuel. COMPARATIVE ASSESSMENT OF CEPHALIC INDEX AMONG BINI AND IGBO TRIBES IN BENIN CITY, NIGERIA. Int J Anat Res 2019;7(2.3):6685-6689. DOI: 10.16965/ijar.2019.208