Morphometric evaluation of the foramen magnum: A study on computerized tomographic images of South Indian adults

Gobbur, Arjun R and Rai , Santosh PV (2013) Morphometric evaluation of the foramen magnum: A study on computerized tomographic images of South Indian adults. International Journal of AJ Institute of Medical Sciences, 2 (1). pp. 65-72.

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Abstract

The purpose of the present study was to evaluate the computerized tomographic radiological measurements of the foramen magnum as well as to note the variations in the shape of the foramen magnum of adults of South Indian origin. Clinically information regarding anatomic features of the foramen magnum and its variations has surgical significance in a transcondylar surgical approach to the foramen magnum considering condylar resections to improve the exposure of this region. From a forensic point of view, determination of sex using the occipital bone by means of morphometric evaluation of the foramen magnum may prove useful in cases of significantly disrupted or fragmented unknown human skeletal remains. Cranial computerized tomographic images of 150 normal south india subjects (75 males and 75 females) between the ages 18 and 86 years were examined in the present study. The findings of the present study, in terms of various morphometric dimensions in relation to the foramen magnum region including the shape, area, and index of the foramen magnum, provide anatomical knowledge of clinical importance to the surgeons performing surgeries in relation to the cranial base. The most common variation in the shape of the foramen magnum was round (40%), followed by oval (30%). In addition, although all the dimensions were larger in the male, using discriminant function analysis, the length of the left occipital condyle (LLC) and the maximum medial intercondylar distance (MID) were fount to be statistically different in each sex (p<0.05) with 71.4% and 66.7% accuracy, respectively. From a forensic point of view, this study demonstrates that there is limited, albeit statistically significant, expressiong of sexual differences in the foramen magnum region of the south indian population, which may prove useful in predicting sex in fragmented cranial bases by discriminant function analysis. However, due to not very high percentage of correct classifictions, this method cannot be recommended for sexing complete skulss.

Item Type: Article
Uncontrolled Keywords: Foramen magnum; Forensic anatomy; Surgical anatomy: Forensic anthropometry; Sex determination
Subjects: Medicine > KMC Mangalore > Radio Diagnosis and Imaging
Depositing User: KMCMLR User
Date Deposited: 20 Sep 2013 05:16
Last Modified: 20 Sep 2013 05:16
URI: http://eprints.manipal.edu/id/eprint/137243

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