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International Journal of Morphology

On-line version ISSN 0717-9502

Abstract

GHAUS, Farah  and  FARUQI, N. A. Bilateral Variations and Sexual Dimorphism in Morphometric Parameters of Infraorbital Groove, Canal and Foramen in Human Foetuses. Int. J. Morphol. [online]. 2009, vol.27, n.2, pp.475-480. ISSN 0717-9502.  http://dx.doi.org/10.4067/S0717-95022009000200027.

Foetal anatomy seems to be highly promising developing speciality in the recent past. Maxilla is the key to facial skeleton. Its anatomy in general and bilateral variations along with sexual dimorphism in particular are of great surgical and forensic importance.Thirty two maxillae of sixteen human foetuses (21 wks to 34 wks) were considered to measure lengths of infraorbital groove and canal, widths of ends of infraorbital groove, diameters of infraorbital foramen and the distances of latter from infraorbital margin and nasal notch. Groups I (21-25 wks) and II (26-30 wks) foetuses were crucial for bilateral variations for most of the parameters. Distance between infraorbital foramen and nasal notch showed variations on two sides in maximum foetal groups. Infraorbital canal was found to be larger in groups II and III foetuses in females. Width of the posterior end of infraorbital groove was less in group I, equal in group II and more in group III in males. Sexual dimorphism was noticed in all the groups for the distance of infraorbital foramen from infraorbital margin. Distance of infraorbital foramen from nasal notch did not show sexual dimorphism in most of the groups except group I where value was more in males. Rule of generalized phenomenon of larger skeleton in male was not applicable in most of the groups.

Keywords : Bilateral variation; Sexual dimorphism; Infraorbital groove; Infraorbital canal; Infraorbital foramen; Human foetuses.

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