Statistical Analysis and Modeling
of Response Dependencies in Neural Populations
A NIPS 2008 Workshop, December 12-13, 2008
The Hilton Whistler Resort & Spa: Mt. Currie N
Sponsored by the Bernstein Center for Computational Neuroscience
Organizers: Arno Onken (Primary Contact), Klaus Obermayer, Valentin Dragoi, Steffen Grünewälder, Denise Berger
Goal of the workshop:
It is well known that sensory and motor information is represented in the activity of large populations of neurons. Encoding and decoding is subject of active research. The two dominant theories of neural coding are rate and temporal coding. They are studied by considering the dependencies between responses of several neurons. In the typical theoretical framework, response dependencies are characterized by correlation coefficients and cross-correlograms. The main goal of this workshop is to challenge the dependency concepts that are typically applied and to disseminate more sophisticated concepts to a wider public. It will bring together experts from different fields and encourage exchange of insights between experimentalists and theoreticians.
Issues to be discussed:
- How important are response dependencies for neural coding?
- What are the consequences of simplified assumptions?
- How should response dependences be measured?
- How do we generate parametric models based on recorded data?
- Discrete vs. continuous descriptions of neural activity: Which description is more appropriate?
- What are the limitations of experimental and analytical methods that we currently face? What can be done to overcome them?
| Schedule | ||
| Day 1 Morning | ||
| 07:30-07:45 07:45-08:15 08:15-08:45 08:45-09:00 09:00-09:30 09:30-10:00 10:00-10:30 | Introduction Beyond correlations: modeling neural dependencies with copulas abstract slides paper Copula-based point process models of neural dependence abstract slides paper Coffee break Dual coding by spiking neural networks abstract slides related_publications Low-dimensional single-trial analysis of neural population activity abstract paper Estimating neural signal dependence using kernels abstract slides | Pietro Berkes Rick Jenison Naoki Masuda Byron Yu Nishant Mehta |
| 10:30-15:30 | Break | |
| Day 1 Afternoon | ||
| 15:30-16:15 16:15-16:45 16:45-17:00 17:00-17:40 17:40-18:10 18:10-18:30 | Inter-neuronal connectivity and correlation in a model of V1 simple cells abstract slides The flashlight transformation for mixture copula based modeling of spike-counts abstract slides paper Coffee break Adaptive coding in visual cortical networks abstract slides Optimal inference from population of neurons in macaque primary visual cortex abstract Open discussion | Wyeth Bair Arno Onken Valentin Dragoi Arnulf Graf |
| Day 2 Morning | ||
| 07:30-08:00 08:00-08:30 08:30-08:45 08:45-09:30 09:30-10:00 10:00-10:30 | Identification of assembly activity by simultaneous spike trains and local field potential abstract publications Spatially organized higher-order spike synchrony in cat area 17 abstract Coffee break Relating response variability across stages of cortical processing abstract How pairwise correlations shape the statistical structure of population activity abstract Discussion | Sonja Grün Denise Berger Adam Kohn Jakob Macke |
| 10:30-15:30 | Break | |
| Day 2 Afternoon | ||
| 15:30-16:15 16:15-16:30 16:30-17:00 17:00-17:30 17:30-18:30 | Modelling dependent count data abstract slides bibliography Coffee break Capacity of a single spiking neuron for temporal and rate coding abstract slides State-space analysis on time-varying higher-order spike correlations abstract Open discussion | Dimitris Karlis Shiro Ikeda Hideaki Shimazaki |

