"On the inflated view, the insula was clearly limited by the circular sulcus of the insula divided
in 3 segments: superior [S_circular_insula_sup, 49], horizontally limiting the
insula from the subcentral and inferior frontal gyri, anterior
[S_circular_insula_ant, 47], vertically limiting the insula from the orbital
gyri, and inferior [S_circular_insula_inf, 48], obliquely limiting the
insula from the superior aspect of the superior temporal gyrus. The lateral
sulcus or fissure results from the juxtaposition of fronto-parietal and
temporal opercula, and is classically divided in anterior, middle and posterior
segments (Duvernoy et al., 1991). The superior and anterior segments of
the circular sulcus of the insula anteriorly fused to form the anterior
segment of lateral sulcus that rapidly splits into vertical [Lat_Fis-ant-Vertical,
40]
and horizontal rami [Lat_Fis-ant-Horizont, 39]. Since the inflated
representation widely separated the opercula bordering the insula, the middle
segment of the lateral sulcus was missing on inflated reconstruction.
Finally, the superior and inferior segments of the circular sulcus of the
insula posteriorly merged to become the posterior segment of the lateral sulcus [Lat_Fis-post, 41], which curved
superiorly to enter the inferior parietal lobule.
Is there any reference available for tracking the boundaries of 5 parcellations within insula as given by Destrieux a2009s?_______________________________________________
Cheers
Lena
_______________________________________________________
Lena Palaniyappan
Clinical Lecturer & Honorary StR | Division of Psychiatry ( University of Nottingham)
South Block 'A' floor| Queens Medical Centre | Nottingham | NG7 2UH
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