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Connections of the living human brain, on a macroscopic scale, can be mapped by a diffusion MR imaging based workflow. Since the same anatomic regions can be corresponded between distinct brains, one can compare the presence or the absence…

Neurons and Cognition · Quantitative Biology 2016-02-16 Balázs Szalkai , Csaba Kerepesi , Bálint Varga , Vince Grolmusz

The human connectome is the object of an intensive research today. In these graphs, the vertices correspond to the small areas of the gray matter, and two vertices are connected by an edge, if a diffusion-MRI based workflow finds…

Neurons and Cognition · Quantitative Biology 2016-09-28 Csaba Kerepesi , Balázs Szalkai , Bálint Varga , Vince Grolmusz

The human brain is the most complex object of study we encounter today. Mapping the neuronal-level connections between the more than 80 billion neurons in the brain is a hopeless task for science. By the recent advancement of magnetic…

Neurons and Cognition · Quantitative Biology 2020-09-01 Balint Varga , Vince Grolmusz

Based on the data of the NIH-funded Human Connectome Project, we have computed structural connectomes of 426 human subjects in five different resolutions of 83, 129, 234, 463 and 1015 nodes and several edge weights. The graphs are given in…

Neurons and Cognition · Quantitative Biology 2016-10-07 Csaba Kerepesi , Balazs Szalkai , Balint Varga , Vince Grolmusz

In mapping the human structural connectome, we are in a very fortunate situation: one can compute and compare graphs, describing the cerebral connections between the very same, anatomically identified small regions of the gray matter among…

Neurons and Cognition · Quantitative Biology 2017-12-01 Mate Fellner , Balint Varga , Vince Grolmusz

In the applications of the graph theory it is unusual that one considers numerous, pairwise different graphs on the very same set of vertices. In the case of human braingraphs or connectomes, however, this is the standard situation: the…

Neurons and Cognition · Quantitative Biology 2016-05-06 Csaba Kerepesi , Balint Varga , Balazs Szalkai , Vince Grolmusz

While it is still not possible to describe the neural-level connections of the human brain, we can map the human connectome with several hundred vertices, by the application of diffusion-MRI based techniques. In these graphs, the nodes…

Neurons and Cognition · Quantitative Biology 2020-09-09 Mate Fellner , Balint Varga , Vince Grolmusz

Human braingraphs or connectomes are widely studied in the last decade to understand the structural and functional properties of our brain. In the last several years our research group has computed and deposited thousands of human…

Neurons and Cognition · Quantitative Biology 2024-12-03 Balint Varga , Vince Grolmusz

The human braingraph, or connectome is a description of the connections of the brain: the nodes of the graph correspond to small areas of the gray matter, and two nodes are connected by an edge if a diffusion MRI-based workflow finds fibers…

Neurons and Cognition · Quantitative Biology 2015-07-02 Csaba Kerepesi , Balázs Szalkai , Bálint Varga , Vince Grolmusz

For more than a decade now, we can discover and study thousands of cerebral connections with the application of diffusion magnetic resonance imaging (dMRI) techniques and the accompanying algorithmic workflow. While numerous connectomical…

Neurons and Cognition · Quantitative Biology 2019-12-06 Laszlo Keresztes , Evelin Szogi , Balint Varga , Vince Grolmusz

The increasing quantity and quality of the publicly available human cerebral diffusion MRI data make possible the study of the brain as it was unimaginable before. The Consensus Connectome Dynamics (CCD) is a remarkable phenomenon that was…

Neurons and Cognition · Quantitative Biology 2016-10-17 Balázs Szalkai , Vince Grolmusz

Here we show a method of directing the edges of the connectomes, prepared from diffusion tensor imaging (DTI) datasets from the human brain. Before the present work, no high-definition directed braingraphs (or connectomes) were published,…

Neurons and Cognition · Quantitative Biology 2016-09-29 Balázs Szalkai , Csaba Kerepesi , Bálint Varga , Vince Grolmusz

Deep graph-theoretic ideas in the context with the graph of the World Wide Web led to the definition of Google's PageRank and the subsequent rise of the most-popular search engine to date. Brain graphs, or connectomes, are being widely…

Neurons and Cognition · Quantitative Biology 2016-02-17 Balazs Szalkai , Balint Varga , Vince Grolmusz

The correlations of several fundamental properties of human brain connections are investigated in a consensus connectome, constructed from 1064 braingraphs, each on 1015 vertices, corresponding to 1015 anatomical brain areas. The properties…

Neurons and Cognition · Quantitative Biology 2024-04-22 Dániel Hegedűs , Vince Grolmusz

We consider the 1015-vertex human consensus connectome computed from the diffusion MRI data of 1064 subjects. We define seven different orders on these 1015 graph vertices, where the orders depend on parameters derived from the brain…

Neurons and Cognition · Quantitative Biology 2022-12-02 Daniel Hegedus , Vince Grolmusz

The connectome, a map of the structural and/or functional connections in the brain, provides a complex representation of the neurobiological phenotypes on which it supervenes. This information-rich data modality has the potential to…

Graph theory in the last two decades penetrated sociology, molecular biology, genetics, chemistry, computer engineering, and numerous other fields of science. One of the more recent areas of its applications is the study of the connections…

Neurons and Cognition · Quantitative Biology 2020-03-19 Balázs Szalkai , Bálint Varga , Vince Grolmusz

The characterisation of the brain as a "connectome", in which the connections are represented by correlational values across timeseries and as summary measures derived from graph theory analyses, has been very popular in the last years.…

Machine Learning · Computer Science 2020-03-13 Tiago Azevedo , Luca Passamonti , Pietro Liò , Nicola Toschi

In the study of the human connectome, the vertices and the edges of the network of the human brain are analyzed: the vertices of the graphs are the anatomically identified gray matter areas of the subjects; this set is exactly the same for…

Neurons and Cognition · Quantitative Biology 2018-11-26 Mate Fellner , Balint Varga , Vince Grolmusz

Deep, classical graph-theoretical parameters, like the size of the minimum vertex cover, the chromatic number, or the eigengap of the adjacency matrix of the graph were studied widely by mathematicians in the last century. Most researchers…

Neurons and Cognition · Quantitative Biology 2017-09-18 Balazs Szalkai , Balint Varga , Vince Grolmusz
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