Department of Computer Science | Institute of Theoretical Computer Science | CADMO

Theory of Combinatorial Algorithms

Prof. Emo Welzl and Prof. Bernd Gärtner

Mittagsseminar (in cooperation with M. Ghaffari, A. Steger and B. Sudakov)

Mittagsseminar Talk Information

Date and Time: Tuesday, December 20, 2016, 12:15 pm

Duration: 30 minutes

Location: CAB G51

Speaker: Felix Weissenberger

Fast Rate-Based Plasticity

Synaptic plasticity (i.e., the ability of synapses to change their efficacy) seems to be the foundation of learning and memory in the brain. Experiments suggest that synaptic plasticity depends on the activity of the pre- and postsynaptic cells. Hence, in corresponding learning rules the synapse must “know” how active the cells are. We study learning rules in the context of fast modulation of activity (as observed for real-world stimuli). We find that estimating the activity based on postsynaptic spiking does not provide enough information to implement classical learning rules. However, we show that a different approach based on the postsynaptic membrane potential works. This allows for example to translate classical rate based learning rules (which do not work with such stimuli) to voltage based learning rules (which do). Based on joint work with Angelika Steger, Johannes Lengler, Marcelo Gauy, and Flo Meier

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