Morphological variations of the limbic-lobar border cortex on the inner side of human brain hemisphere
Year: 2010
Type: article
Abstract: Background and Purpose: Medial side of brain hemispheres is divided into two cortical regions: the inner region -limbic, and the outer regionlobar one. As the limbic region is responsible for vegetative and sexual functions, memory and cognition, the outer region -lobar cortex of medial brain side is the seat of associative, sensorimotor and sensorial regions. By studying the morphology and morphometry of brain medial side sulci: sulcus cinguli (SCG), sulcus subparietalis (SSP) and presence of gyri transitivi superficiales (GTS), this work aims to research variability of the limbic-lobar border area, as well as the presence of right/left brain asymmetry -the phenomenon of function lateralization.Material and Methods: Morphological examination was performed on 42 brains (84 hemispheres) taken from persons of both sexes and different age at death (26 males and 16 women, 20-65 years old), who had no pathological changes on the brain.The brains were fixated in 10% formalin during 4 weeks, after which the brain membranes were removed.After morphological classification we measured the length of SCG i SSP by digital morphometry with AutoCAD software.We also determined the frequency of transitional gyri: gyrus frontolimbicus in anterior, gyrus lobulolimbicus in medial, and gyrus precuneolimbicus and gyrus cuneolimbicus in posterior part of the cortex. Results:The length of sulcus cinguli on the left was 146.38mm, on the right 145.93mm (p>0.05).Summing the lengths of sulcus cinguli and sulcus paracinguli (where the latter was found), showed statistically significant difference on left hemispheres (left: 196.66mm, right: 168.35mm, p<0.01).The results of length measurements for sulcus subparietalis, on the left side: 78.33mm, on the right: 72.55mm, did not show statistical significance (p>0.05).The frequency of transitional gyri were: gyrus frontolimbicus (one transitional gyrus 32.2%, two transitional gyri 5.9%), gyrus lobulolimbicus (16.7%), gyrus precuneolimbicus (anterior 61.9%, medius 8.3%, posterior 85.7%) and gyrus cuneolimbicus (2.4 %). Conclusion: Cumulative length of sulcus cinguli and sulcus paracinguli is statistically higher on left hemispheres, what implicates the Left/Right brain asymmetry and presence of lateralized functions on medial limbic-associative cortical border.
Institution: University of Banja Luka
Language: English
Subfield: Anatomy
Field: Medicine
Domain: Health Sciences
Open Access status: green
OpenAlex ID: W1491199022