Multiscale interactions and neuronal mass modeling Chair: Viktor Jirsa Session II Multiscale interactions and neuronal mass modeling Chair: Viktor Jirsa Michael Breakspear: Bifurcations and Multiscale Cascades in Cortical Dynamics Mitsuo Kawato: Towards Manipulative Neuroscience Based on Brain Network Interface Roger Traub: Gap Junctions and Cortical Oscillations Gustavo Deco: Competition and Cooperation Mechanisms in Neural and Cortical Dynamics: Attention, Memory and Decision-Making

Key Issue Given a large-scale distributed anatomical architecture composed of functionally differentiated areas, how can a spatiotemporal network dynamics arise that is capable of capturing detailed cognitive architectures and dynamics? Foci of this session Neuronal population dynamics (local) Functionally relevant large-scale network dynamics (global)

Low-dimensional description of population dynamics Anatomical and functional architectures based on a distributed population variable (x,t) Local architectures: Can we substitute the detailed neuronal dynamics Q(t) by a lower-dimensional population variable such as a field (x,t) ? Assisi et al PRL (2005) Cortical architectures with intra- and inter-areal connections

Functionally meaningful large-scale network dynamics (global) Functional architectures: Multisensory - Dhamala et al (2006) Auditory Streaming - Almonte et al. (2006)

Functional architecture from brain imaging data implies cognitive architecture Foreground-background separation in auditory scenes gives rise to perceptual integration (Auditory Streaming) Pitch Difference Cognitive architectures: Multisensory - Dhamala et al (2006) Auditory Streaming - Almonte et al. Physica D (2005)

Multiscale interactions and neuronal mass modeling Chair: Viktor Jirsa Session II Multiscale interactions and neuronal mass modeling Chair: Viktor Jirsa Michael Breakspear: Bifurcations and Multiscale Cascades in Cortical Dynamics Mitsuo Kawato: Towards Manipulative Neuroscience Based on Brain Network Interface Roger Traub: Gap Junctions and Cortical Oscillations Gustavo Deco: Competition and Cooperation Mechanisms in Neural and Cortical Dynamics: Attention, Memory and Decision-Making