Dresden 2017 – wissenschaftliches Programm

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BP: Fachverband Biologische Physik

BP 42: Neurosciences

BP 42.4: Vortrag

Mittwoch, 22. März 2017, 16:00–16:15, ZEU 250

A circuit to mimic a bio-inspired two-alternatives decision-making experiment based on elementary motion detection — •Tom Birkoben, Mirko Hansen, Marina Ignatov, Martin Ziegler, and Hermann Kohlstedt — Nanoelektronik, Technische Fakultät, Christian Albrechts Universität zu Kiel, Germany

Decision-making belongs to one of the most important principles in the nervous system of living species. A decision is based on the temporally available sensory input data and previous experiences made in similar situations, i.e. related to memory and reward. In-depth studies utilizing two-alternatives saccadic eye movement tasks led to a profound understanding of neuronal information processing. Three fundamental processing stages are needed to perform this kind of tasks successfully: a neuronal representation of the sensory signal, the integration of the stimuli and the comparison of the accumulated information to a threshold for a final decision. We present an analogue electronic decision-making circuit. Our concept study includes an LED-matrix as the task screen, an array of photo diodes, a Hassenstein-Reichardt Detector based motion detection and finally a signal integration circuit based on an inhibitory coupling scheme. The biologically well motivated effects of previous experiences (memory and reward) for decision making might be effectively implemented into the circuit by memristive devices, which will be discussed in the framework of I-V characteristics and the circuit layout.

Financial Support by the German Research Foundation through FOR 2093 is gratefully acknowledged.