IFISC Seminar on Wednesday Oct 26, 2022 at 14:30 Place: IFISC Seminar Room Title: How not to construct functional brain networks Speaker: Onerva Korhonen, Aalto University Abstract: <p>Human brain function relies on interactions between brain areas. Therefore, a complex network appears as a natural model for the brain, and network science indeed holds potential for understanding the brain. However, constructing a functional brain network is not trivial. I will address common problems in brain network construction, concentrating on a step that strongly affects obtained network properties: definition of network nodes. Using multiple fMRI datasets, I will show that the currently used node definition strategies produce nodes that suffer from low functional homogeneity, which may lead to spuriosity in observed network structure and data losses. Further, I will show that functional homogeneity changes in time, reflecting nodes&rsquo; roles in network topology. Finally, as a potential solution for node definition problem, I will introduce a flexible node definition strategy that accounts for the time-dependent nature of brain function.</p> <p>Presential seminar, with parallel Zoom stream:&nbsp;&nbsp;https://zoom.us/j/98286706234?pwd=bm1JUFVYcTJkaVl1VU55L0FiWDRIUT09</p>; Url event:https://ifisc.uib-csic.es/en/events/seminars/how-not-to-construct-functional...