Abstract
The correlation between the cranial height and the height of the corpus callosum trunk bulge, and the relationship between the corpus callosum shape and the cranial shape have not been studied. The purpose of the article was to determine the individual variability of the corpus callosum height and shape of adults, and their dependence on the cranial height and shape. The material was two samples from a series of MR scans of the head of men and women of the second period of adulthood (19 variations in each group) without the central nervous system pathology. Magnetic resonance tomographic scanner Magnetom C was used for obtaining MRI images. Morphometric study was conducted using RadiAnt Dicom Viewer software on MR scans performed in the sagittal area in T1- and T2-weighted images modes. According to the findings, the height of the corpus callosum trunk bulge of men is on average – 26.1 ± 2.8 mm, women – 25.2 ± 2.6 mm, and the neurocranium height – 150.4 ± 6.9 mm and 140.2 ± 4.2 mm, respectively. Wherein the aspect ratio of the neurocranium height to the corpus callosum trunk bulge height in men is 5.8 ± 0.7, in women – 5.6 ± 0.5. The aspect ratio of the corpus callosum longitudinal size along the constricting chord to its trunk bulge height in men is on average 2.8 ± 0.3, in women – 2.7 ± 0.3. The absence of correlation between the cranial height and the corpus callosum trunk bulge height, and the absence of correlation between the corpus callosum shape and cranial shape in people of the second period of adulthood have been concluded.
Highlights
The corpus callosum has been comprehensively studied for centuries (Sigirl et al, 2012; Van Der Knaap & Van Der Ham, 2011; Westerhausen et al, 2018), whereby it is known that its function includes interhemispheric information exchange, integration of background information that reaches one or both hemispheres, as well as the facilitation of certain types of cortical activity and its suppression (Aboitiz & Montiel, 2003; Bloom & Hynd, 2005; Buklina, 2005; Roland et al, 2017)
In the patent for the invention No 2396907 “Method of lifetime determination of the corpus callosum size”, all measurements were made on brain median images obtained by magnetic resonance imaging
After drawing straight lines through the mentioned points, we inscribe the corpus callosum contour profile within a scalene rectangle, the long sides of which are equal to its longitudinal size, which we call the corpus callosum constricting chord, and its short side are equal to its trunk bulge maximum height
Summary
The corpus callosum has been comprehensively studied for centuries (Sigirl et al, 2012; Van Der Knaap & Van Der Ham, 2011; Westerhausen et al, 2018), whereby it is known that its function includes interhemispheric information exchange, integration of background information that reaches one or both hemispheres, as well as the facilitation of certain types of cortical activity and its suppression (Aboitiz & Montiel, 2003; Bloom & Hynd, 2005; Buklina, 2005; Roland et al, 2017). In the patent for the invention No 2396907 “Method of lifetime determination of the corpus callosum size”, all measurements were made on brain median images obtained by magnetic resonance imaging. 2021 Volume 12, Issue 3 to determine the angle of curvature of the corpus callosum by calculating the angle value at the apex of the isosceles triangle that has the same side and altitude as the rectangle circumscribed around the corpus callosum contour. The centroid size is calculated as the square root of the sum of the squares of the distance of all labels from their centroid This geometric analysis method of the corpus callosum, in our opinion, is too labour-intensive. The purpose of the article was to determine the individual variability of the height and shape of the corpus callosum of adults and their dependence on the cranial height and shape
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