A metric survey on the sagittal and coronal morphology of the precuneus in adult humans

Bruner, Emiliano; Pereira‐Pedro, Ana Sofia

doi:10.1007/s00429-020-02152-0

Cited by 3 publications

(2 citation statements)

References 68 publications

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“…However, in this enhanced model, we can see that this complexity is extended to the medial regions, namely the cingulate cortex and, partially, the precuneus. This is particularly interesting because the precuneus display a noticeable individual and phylogenetic diversity in humans and hominoids (Bruner, 2018b; Bruner & Pereira‐Pedro, 2020; Bruner, Pereira‐Pedro, et al, 2017; Bruner, Preuss, et al, 2017), being a central node for both structural and functional brain connectivity (Hagmann et al, 2008). We must hence wonder to what extent such morphological diversity can have an influence on (or else be generated by) the spatial arrangements of this core topological region.…”

Section: Discussionmentioning

confidence: 99%

A network approach to the topological organization of the Brodmann map

Bruner

2022

The Anatomical Record

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Brain morphology is the result of functional factors associated with cortical areas, but it is also influenced by structural aspects due to physical and spatial constraints. Despite the noticeable advances in brain mapping, Brodmann's map is still used in many research fields that rely on macroscopic cortical features for practical or theoretical issues. Here, the topological relationships among the Brodmann areas were modeled according to the principles of network analysis, in order to provide a synthetic view of their spatial properties following a criterion of contiguity. The model evidences the importance of the parieto-temporal region in terms of biological burden and topological complexity. The retrosplenial region is particularly influenced by spatial constraints, and the cingulate cortex occupies a position that bridges the anterior and posterior topological blocks. Such spatial framework should be taken into account when dealing with brain morphology in both ontogeny and phylogeny.

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Section: Discussionmentioning

confidence: 99%

A network approach to the topological organization of the Brodmann map

Bruner

2022

The Anatomical Record

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“…For example, it has been reported that the human precuneus is both disproportionately expanded and more variable across individuals in comparison with that of chimpanzees (Bruner et al 2017). In the course of this expansion, the precuneus has segregated further into anterior and posterior components weighted toward processing of somatic and visual information, respectively (Bruner et al 2019;Bruner and Pereira-Pedro 2020), reflecting an elaboration of the pattern found in the macaque (Passarelli et al 2018). Although there is a strong possibility of significant changes in gradients of claustrum-cortical connectivity during human evolution, we currently lack the information about the functional organization of the claustrum in humans which would be necessary to evaluate this hypothesis.…”

Section: Putative Integrative Functions Of the Claustrocortical Networkmentioning

confidence: 99%

Claustral Input to the Macaque Medial Posterior Parietal Cortex (Superior Parietal Lobule and Adjacent Areas)

et al. 2021

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The projections from the claustrum to cortical areas within and adjacent to the superior parietal lobule were studied in 10 macaque monkeys, using retrograde tracers, computerized reconstructions, and quantitative methods. In contrast with the classical view that posterior parietal areas receive afferents primarily from the dorsal and posterior regions of the claustrum, we found that these areas receive more extensive projections, including substantial afferents from the anterior and ventral regions of the claustrum. Moreover, our findings uncover a previously unsuspected variability in the precise regions of the claustrum that originate the projections, according to the target areas. For example, areas dominated by somatosensory inputs for control of body movements tend to receive most afferents from the dorsal-posterior claustrum, whereas those which also receive significant visual inputs tend to receive more afferents from the ventral claustrum. In addition, different areas within these broadly defined groups differ in terms of quantitative emphasis in the origin of projections. Overall, these results argue against a simple model whereby adjacency in the cortex determines adjacency in the sectors of claustral origin of projections and indicate that subnetworks defined by commonality of function may be an important factor in defining claustrocortical topography.

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Morphological patterns and spatial probability maps of the superior parietal sulcus in the human brain

2022

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The superior parietal sulcus (SPS) is the defining sulcus within the superior parietal lobule (SPL). The morphological variability of the SPS was examined in individual magnetic resonance imaging (MRI) scans of the human brain that were registered to the Montreal Neurological Institute (MNI) standard stereotaxic space. Two primary morphological patterns were consistently identified across hemispheres: (i) the SPS was identified as a single sulcus, separating the anterior from the posterior part of the SPL and (ii) the SPS was found as a complex of multiple sulcal segments. These morphological patterns were subdivided based on whether the SPS or SPS complex remained distinct or merged with surrounding parietal sulci. The morphological variability and spatial extent of the SPS were quantified using volumetric and surface spatial probabilistic mapping. The current investigation established consistent morphological patterns in a common anatomical space, the MNI stereotaxic space, to facilitate structural and functional analyses within the SPL.

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A metric survey on the sagittal and coronal morphology of the precuneus in adult humans

Cited by 3 publications

References 68 publications

A network approach to the topological organization of the Brodmann map

A network approach to the topological organization of the Brodmann map

Claustral Input to the Macaque Medial Posterior Parietal Cortex (Superior Parietal Lobule and Adjacent Areas)

Morphological patterns and spatial probability maps of the superior parietal sulcus in the human brain

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