“Plis de passage” Deserve a Role in Models of the Cortical Folding Process

Mangin, Jean François; Guen, Yann Le; Labra, Nicole; Grigis, Antoine; Frouin, Vincent; Guevara, Miguel; Fischer, Clara; Rivière, Denis; Hopkins, William D.; Régis, Jean; Sun, Zhongyi

doi:10.1007/s10548-019-00734-8

Cited by 37 publications

(31 citation statements)

References 106 publications

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“…The early maturation of the right STS (Glasel et al 2011;Rajagopalan et al 2011) would result in prolonged erosion of PPs giving rise to a deeper, less interrupted sulcus compare to its left counterpart (Ochiai et al 2004;Glasel et al 2011;Leroy et al 2015). Then, a second step would involve the gradual introduction of U-shape fibers joining the STS walls, passing in larger proportions through the most direct trajectories provided by superficial PPs, as previously suggested (J.-F. Mangin et al 2019). We have shown in this respect fewer streamlines under deep PPs and a generally lower proportion in the right (and deeper) STS ( figure 4).…”

Section: Anatomical Implicationsmentioning

confidence: 76%

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Plis de passage in the Superior Temporal Sulcus: Morphology and local connectivity

Bodin

Pron

Mao

et al. 2020

Preprint

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While there is a profusion of functional investigations involving the superior temporal sulcus (STS), our knowledge of the anatomy of this sulcus is still limited by a large variability across individuals. Several “plis de passage” (PPs), annectant gyri buried inside the fold, can separate the STS into distinct segments and could explain part of the observed variability. However, an accurate characterization is lacking to properly extract and fully understand the nature of PPs. The aim of the present study is twofold: i. to characterize the STS PPs by directly identifying them within individual STS, using the geometry of the surrounding surface and considering both deep and superficial PPs. ii. to test the hypothesis that PPs constitute local increases of the short-range structural connectivity. Performed on 90 subjects from the Human Connectome Project database, our study revealed that PPs constitute surface landmarks that can be identified from the geometry of the STS walls and that they constitute critical pathways of the U-shaped white-matter connecting the two banks of the STS. Specifically, a larger amount of fibers was extracted at the location of PPs compared to other locations in the STS. This quantity was also larger for superficial PPs than for deep buried ones. These findings raise new hypotheses regarding the relation between the cortical surface geometry and structural connectivity, as well as the possible role of PPs in the functional organization of the STS.

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Section: Anatomical Implicationsmentioning

confidence: 76%

“…Indeed in some subjects we identified more PPs (up to 8 in the left STS) than assumed by the sulcal roots model (Regis et al 2005;Ochiai et al 2004). The functional properties inherent to each PP regions could be an important factor as well, especially in the determination of individual patterns (J.-F. Mangin et al 2019).…”

Section: Anatomical Implicationsmentioning

confidence: 81%

Plis de passage in the Superior Temporal Sulcus: Morphology and local connectivity

Bodin

Pron

Mao

et al. 2020

Preprint

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“…Although less studied in Old Word monkeys, such features are associated with functional specializations in humans ( 31 , 33 – 35 ). Of particular note, several plis de passage (annectant gyri) in the human STS are thought to reflect distinct structural connectivity bridging superior and middle temporal gyri and functional specializations ( 35 – 37 ). Similar to these plis de passages, the macaque STS bumps 1) are convolutions buried in the main furrow of the STS, 2) are distributed along the posterior-to-anterior axis, 3) are consistent in their location across individuals, and 4) emerge early in development.…”

Section: Discussionmentioning

confidence: 99%

Anatomical correlates of face patches in macaque inferotemporal cortex

Arcaro

Mautz

Березовский

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

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Primate brains typically have regions within the ventral visual stream that are selectively responsive to faces. In macaques, these face patches are located in similar parts of inferotemporal cortex across individuals although correspondence with particular anatomical features has not been reported previously. Here, using high-resolution functional and anatomical imaging, we show that small “bumps,” or buried gyri, along the lower bank of the superior temporal sulcus are predictive of the location of face-selective regions. Recordings from implanted multielectrode arrays verified that these bumps contain face-selective neurons. These bumps were present in monkeys raised without seeing faces and that lack face patches, indicating that these anatomical landmarks are predictive of, but not sufficient for, the presence of face selectivity. These bumps are found across primate species that span taxonomy lines, indicating common evolutionary developmental mechanisms. The bumps emerge during fetal development in macaques, indicating that they arise from general developmental mechanisms that result in the regularity of cortical folding of the entire brain.

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“…Alternately, investigators have manually examined and documented characteristic local cortical folds in healthy controls (Yousry et al, 1997; Chiavaras & Petrides, 2000; Mellerio et al, 2016; Zhang, Harris, Split, Troiani, & Olson, 2016), in patients (Bartholomeusz et al, 2013; Isomura et al, 2017; Lavoie et al, 2014; Nakamura et al, 2020; Patti & Troiani, 2018; Takayanagi et al, 2010; Wang et al, 2020; Whittle et al, 2014; Zhang et al, 2016), or in brains obtained at autopsy (White et al, 1997; Zhang et al, 2010, 2011). In much of this work, characterization involved a manual documentation strategy, whereby, local cortical folds were mapped to a set of human-interpretable shapes and the mappings were summarized using pictorial illustrations (Yousry et al, 1997; Chiavaras & Petrides, 2000; Mangin et al, 2019; Mellerio et al, 2016; Weiner et al, 2014). For example, Weiner and colleagues (2014) identified a reliable ω-shaped pattern in the mid-fusiform sulcus, when seen from a coronal view, and further categorized the sulcus into four subtypes each representing a variant of the ω-shape.…”

Section: Introductionmentioning

confidence: 99%

A pipeline to characterize local cortical folds by mapping them to human-interpretable shapes

McMillen¹,

Beiler²,

Snyder³

et al. 2020

Preprint

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BackgroundVariations in regional cortical folds across individuals have been examined using computationally-derived morphological measures, or by manual characterization procedures that map distinct variants of a regional fold to a set of human-interpretable shapes. Although manual mapping approaches have proven useful for identifying morphological differences of clinical relevance, such procedures are subjective and not amenable to scaling.New MethodWe propose a 3-step pipeline to develop computational models of manual mapping. The steps are: represent regional folds as feature vectors, manually map each feature vector to a shape-variant that the underlying fold represents, and train classifiers to learn the mapping.ResultsFor demonstration, we chose a 2D-problem of detecting within slice discontinuity of medial and lateral sulci of orbitofrontal cortex (OFC); the discontinuity may be visualized as a broken H-shaped pattern, and is fundamental to OFC-type-characterization. The classifiers predicted discontinuities with 86-95% test-accuracy.Comparison with Existing MethodsThere is no existing pipeline that automates a manual characterization process. For the current demonstration problem, we conduct multiple analyses using existing softwares to explain our design decisions, and present guidelines for using the pipeline to examine other regional folds using conventional or non-conventional morphometric measures.ConclusionWe show that this pipeline can be useful for determining axial-slice discontinuity of sulci in the OFC and can learn structural-features that human-raters may rely on during manual-characterization.The pipeline can be used for examining other regional folds and may facilitate discovery of various statistically-reliable 2D or 3D human-interpretable shapes that are embedded throughout the brain.

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“Plis de passage” Deserve a Role in Models of the Cortical Folding Process

Cited by 37 publications

References 106 publications

Plis de passage in the Superior Temporal Sulcus: Morphology and local connectivity

Plis de passage in the Superior Temporal Sulcus: Morphology and local connectivity

Anatomical correlates of face patches in macaque inferotemporal cortex

A pipeline to characterize local cortical folds by mapping them to human-interpretable shapes

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