The microdissection in cerebrum insula and basal ganglia region

Objective To have an intimate knowledge of the corresponding anatomic correlation among cerebrum insular cortex,basal ganglia region and internal capsule in order to provide some important anatomic basis for cleaning hypertensive hemorrhage in basal ganglia region via lateral fissure-insular approach.Methods Dissection and measurement were performed in insular lobe and basal ganglia region of 10 adult cadaveric heads(20 hemispheres).Results The insular cortex,viewed from a lateral side,was triangular(widest superiorly and narrowest inferiorly),with an apical elevation that gave it an overall pyramidal configuration.The insular lobe was located in the depth of the sylvian fissure,covered by the frontal,parietal and temporal,and the depths covered the deep basal nuclei,internal capsule and thalamus.On the middle horizontal section of the insular lobe,the sulci and gyri of insular lobe were all corresponding inward the putamen,in which the middle and posterior short gyri were corresponding the widest part of the putamen and genu of internal capsule.The central sulcus of insula was the closest distance to the putamen,corresponding inward posterior part of putamen and posterior limb of internal capsule as well as thalamus.Conclusion To have an intimate knowledge of the anatomy of the insular lobe and basal ganglia region is helpful to clean intracerebral hematomas in basal ganglia region via sylvian fissure insular surgical approach,and can further reduce the incidence of complications caused by internal capsule injury.