Neurosurgical anatomy of the insular cortex

医学 边缘叶 波瓣 岛叶皮质 舌回 颞下回 解剖 皮质(解剖学) 脑岛 神经科学 立体脑电图 大脑皮层 脑回
作者
Diogo Cunha-Cabral,Susana Maria Silva,Hélio Alves,Raquel Vaz,Pedro Pereira,José Paulo Andrade
出处
期刊:Clinical Neurology and Neurosurgery [Elsevier BV]
卷期号:186: 105530-105530 被引量:4
标识
DOI:10.1016/j.clineuro.2019.105530
摘要

The purpose of this study was to clarify the morphology of the insular cortex focusing not only on the shape of the insula, but also on sulcal and gyral organization. Sixty formalin-fixed adult brain hemispheres had their insula exposed and photographed. The dimensions of each gyrus and sulcus were measured using an image analysis software. The morphometric data obtained was statistically analysed. The insular cortex shape alternates between triangular and trapezoid, being the triangular shape the most common (75%). The angle between the posterior and inferior peri-insular sulcus in the trapezoid insulae had a mean range of 131.17° (SD = 12.277). A minimum of 3 and a maximum of 6 insular gyri were observed, being 5 the most common total number of gyri observed. The accessory gyrus was present in 66% of the insulae and well-developed in 38% of the cases. A statistical association between the number of gyri in the posterior lobe and the presence of a novel gyrus or a more developed accessory gyrus in the anterior lobe was found (P = 0.006). The posterior short gyrus was the longest of the short gyri (P < 0.001), followed by the anterior short gyrus (P < 0.001). The anterior long gyrus was the largest of the long gyri (P = 0.003). The contribution of each of the short gyri to the formation of the insular apex was inconstant. The most common observed apex arrangement was the combination of the anterior and of the middle short gyri. This study makes a strong contribution to the understanding of the insular cortex anatomy, allowing neurosurgeons to be more capable to decide the best approach to this cortical area.
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