Morphological Evaluation and Inter-hemispheric Differences of Human Sylvain Sulcus: A Cadaveric Study

Abstract

Background: The current literature specifies variations in the morphology of the lateral sulcus in the human brain, and it is highly confined to the point of its posterior termination. The present study was conducted to evaluate morphometric characteristics of lateral sulcus as well as to find out associated interhemispheric differences among adult brain samples. Methodology: Across-sectional study was carried out at the Department of Anatomy of one of the medical colleges in Pune city of Maharashtra. In the study, 54 formalin-fixed intact adult brains, irrespective of gender, were examined. The lateral sulcus was inspected for each segment, surface, and termination from the given samples. The data was entered into Microsoft Office Excel Sheet. The data analysis was done using Statistical Package for Social Sciences (SPSS) version 25 software. Results: The most frequently occurred termination types, viz. oblique and straight. The U-shaped configuration was observed to be the commonest pattern. The diagonal sulcus was noted in 32 (59.25%) hemispheres, while the triangularis sulcus was identified in 45 (83.33%) hemispheres. The mean of the total length of the lateral sulcus on the left side was greater than on the right side. The left lateral sulcus was significantly longer than the right, and both were positively correlated. Conclusion: The findings of present study conform to the literature regarding the morphology of lateral sulcus and associated inter-hemispheric differences related to it