In order to enable an iCal export link, your account needs to have an API key created. This key enables other applications to access data from within Indico even when you are neither using nor logged into the Indico system yourself with the link provided. Once created, you can manage your key at any time by going to 'My Profile' and looking under the tab entitled 'HTTP API'. Further information about HTTP API keys can be found in the Indico documentation.
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Neuronal avalanches and the corticostriatal network
(CB/CSC/KTH and Bernstein Center, University of Freiburg)
In order to determine how the striatum processes cortical neuronal avalanches, we simultaneously recorded spontaneous local field potentials (LFPs) in organotypic cortex-striatum-substantia nigra cultures from rat using high-density microelectrode arrays. In the cortex, we found that spontaneous neuronal avalanches can be characterized by spatiotemporal activity clusters with a cluster size distribution that follows a power law with exponent –1.5. Recording in the striatum revealed, that striatal activity was also characterized by spatiotemporal clusters that followed a power distributions albeit with significantly steeper slope, i.e., lacked large spatial clusters that are commonly expected for avalanche dynamics. To understand what controls the striatal LFP statistic observed in experiments, we developed abstract models of the corticostriatal network. Here we show that decorrelation of striatal activity could result from a particular mapping in the corticostriatal pathway and that local inhibition additionally decreases probability of large spatial clusters. To bridge from the abstract level we used a spiking network to study the influence of different cortical inputs and feedforward striatal inhibition to the experimentally observed striatal dynamics.