Morphometric Characterization of Oculonasal Features of Southern Nigerians using Multifactorial Discriminant Analysis

• A.J Adekanmbi

Adequate knowledge of morphologic diversities within and between populations reduces misidentification and aids in conservation of features among populations. The characterisation of diversity based on morphological properties provides to some extent a reasonable representation of the differences among populations, though not exhaustive, it could serve as the foundation upon which DNA analysis could be built. This study used multivariate discriminant analysis of oculonasal measurements of people from the southwest, southeast and south south Nigeria to determine traits or specific features that are peculiar to each of them. Interpupillary distance (IPD) Inner intercanthal distance (IID), Outer Intercanthal distance (OID), Horizontal length of palpebral fissure (HLP), Vertical length of palpebral fissure (VLP), Nasal height (NH), Nasal breadth or nasal width (NB), and Nasal tip protrusion (NTP) were measured in randomly selected individuals in Bowen University, Iwo. Results were statistically analysed using discriminant analysis. The study showed that none of the parameters measured can significantly distinguish between members of each region. Nasal height and nasal breadth however showed high discriminating powers, but do not give a high percentage of accuracy in classifying the individuals into their regions

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