The control of global brain dynamics: opposing actions of fronto-parietal control and default mode networks on attention

Hills Building room 1.20
Life and Environmental Sciences, Research
Tuesday 5th March 2013 (16:00-17:00)

For more information please contact Contact: Dr Ulrik Beierholm (

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Part of the School Seminar Series

Speaker: Dr Rob Leech, Computational, Cognitive and Clinical Neuroimaging Laboratory 

Host: BUIC


The brain can be viewed as a complex dynamical system. I will discuss using thisframework to study the brain's critical behaviour. Brain networks are thought to bein a critical state, poised between order and disorder, at a 'tipping' point. I presentevidence investigating the relationship between global brain dynamics andcognitive state using FMRI and neurobiolgoically-inspired computational models.We show, with FMRI, that the criticality of the system is 'tuned' by cognitive stateand, using computational simulations, that well-characterized brain networks suchas the default mode network or fronto-parietal control networks have opposingroles in modulating this criticality.