F-TRACT: a probabilistic atlas of anatomo-functional connectivity of the human brain (F-TRACT_P_11_v2210)

These data come from a cohort of adult patients suffering from pharmaco-resistant focal epilepsies who in the course of preparation to a brain surgery were implanted with intracerebral stereoencephalographic (SEEG) electrodes. The protocol involved brain stimulation at a single site and a simultaneous recording with all remaining contacts on a number of electrodes. Beyond medical aim, performing a number of such stimulations in a single patient allows to infer partial information about their brain anatomo-functional connectivity. What is more, aggregating data from a large cohort of such patients, thus from implantations at different brain regions, allows to derive probabilistic connectivity of the whole human brain. This was achieved by the Functional Tractography project ((F-TRACT)[https://f-tract.eu]) and the results are shared in this dataset. The aggregated data are projected onto a number of parcellations. They describe probabilistic connectivity and connectivity features (such as signal propagation delay) in a context of two parcels: the stimulated and the recorded one. A map for one feature in one parcellation is expressed as a square matrix that can be asymmetric. These matrices were derived from signal analysis of responses to stimulation on an individual level and then aggregation of results on the group level. They can be used to inform about connectivity strength and latency of signal propagation between different areas of the human brain. The naming convention for the atlas versions is the following: "F-TRACT\_P\_XX\_vYYMM" "F-TRACT" and "P" are the common across versions. "F-TRACT" stands for "functional tractography" and "P" stands for "parcellation-based". "XX" varies across alternative versions of a major atlas release and refers to different quality assessments of the same source data as binary code. "vYYMM" varies only across major atlas releases where "YYMM" refers to the year and month of the release. Note that major atlas releases can differ in the source data and/or in the selection of the applied parcellations.