A Morphological and Morphometric analysis of Cerebral Sulci and Gyri of Superolateral Surface in the brains of Human cadaver

Precila Infant Vincy, V (2021) A Morphological and Morphometric analysis of Cerebral Sulci and Gyri of Superolateral Surface in the brains of Human cadaver. Masters thesis, Karpaga Vinayaga Institute of Medical Sciences, Madhuranthagam.

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Abstract

INTRODUCTION: The cerebrum is the largest part of the brain. It consists of two incompletely separated hemispheres. For accommodation of cerebral cortex in a limited space within the rigid cranial box, the surface of cerebral hemisphere is folded into numerous gyri separated by sulci. The one third of cerebral cortex only exposed as gyri and two third is hidden in the sulci. The shapes of the sulci are potentially related to the connectivity of the cortex. Some sulci run deeper to cause elevations in the walls of the ventricles. In neurosurgery, the cerebral sulci are known as main microanatomical borders that serve as a gateway and surgical passage to reach ventricles or deeper lesions. The gyral configuration is not exactly the same in each human brain. Sulcal boundaries are also quite variable. AIMS AND OBJECTIVES: To study the Characteristic pattern, variations, location of various sulci and gyri on superolateral surface of brain. To observe the morphological and morphometrical variations of sulci on superolateral surface. MATERIALS AND METHODS: 100 cerebral hemispheres from fifty brain specimens were collected from the embalmed cadavers from our institution in the Department of Anatomy. Dissection instruments, measuring tape, scale are used. Dissection and observation method is followed in this study. RESULTS: The mean length of the central sulcus is 9.50 cm on the right and 9.89 cm on the left side. The average depth of the central sulcus is 1.84 cm on the right side and 2.04 cm on the left side. In 17 hemispheres, the central sulcus meets the posterior rami of sylvian fissure. The Subcentral gyrus noted in 83 hemispheres. The mean distance between the anterior sylvian point and the inferior rolandic point is 3.37cm on the right side and 3.45 on the left side. The most common configuration of the Pars triangularis is U shape on the right side and V shape on the left side. The two segments of postcentral sulcus are confluent and united with intraparietal sulcus is observed in 43%. The superior frontal sulcus is confluent with the precentral sulcus in 71 hemispheres. The inferior frontal sulcus confluent with precentral sulcus in 65%. CONCLUSION: In microneurosurgery, intraoperative identification of main sulci in transsulcal approaches may increase the operational success and decrease the post operative neurologic deficit. The detailed knowledge of gyral configuration and sulcal boundaries is mandatory for Anatomists, Neurosurgeons and Radiologists.

Item Type: Thesis (Masters)
Additional Information: 201833351
Uncontrolled Keywords: Sulci, gyri, central sulcus, sylvian fissure, precentral sulcus, Postcentral sulcus, pars triangularis, precentral and postcentral gyri, occipital gyri.
Subjects: MEDICAL > Anatomy
Depositing User: Subramani R
Date Deposited: 02 Oct 2021 14:21
Last Modified: 02 Oct 2021 14:21
URI: http://repository-tnmgrmu.ac.in/id/eprint/18443

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