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032

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Brain-machine interfaces with Charles Higgins and Steve Potter

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14 August 2009



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In today’s show we’ll be speaking with two experts in the field of brain-machine interfaces. Our first guest, Charles Higgins from the University of Arizona tells us how he uses insects to control robot motion and how they might be used in the future to develop new biological sensors for artificial systems.
We then speak with Steve Potter from the Georgia Institute of Technology. Instead of taking a fully developed brain and connecting it to a robot, he grows neural circuitry in a Petri-dish and interfaces it with robots, with the ambition to discover how we learn and memorize.

Charles Higgins

Charles Higgins is associate professor and leader of the Higgins Lab at the University of Arizona. Though he started as an electrical engineer, his fascination with the natural world has led him to study insect vision and visual processing, and to try to meld together the worlds of robotics and biology. This fascination and his interest to share it with others brings him every year to the Neuromorphic Engineering Workshop in Telluride, Colorado, where he met our interviewer Adam and took him dragonfly-hunting!

Higgins first tells us about his experiments with natural systems such as dragonflies, and how he’s learning about how their brains work in the hope of applying some of the concepts of neurobiology to engineering systems. He then talks about his most recent work in trying to use the amazing visual system of a dragonfly as a sensor to control a robot, and in turn to provide motion stimulus back to the dragonfly in a closed-loop system. He finishes by telling us a bit about the future in which we will design insect-inspired robots, or even have insects built-in to them directly!

Steve Potter

Steve Potter is the Director of the Potter Group which is part of the Laboratory for NeuroEngineering, a collective research unit shared between Emory University and the Georgia Institute of Technology. To understand how the neurocircuitry in the brain can lead to learning and memory, he’s been growing neural circuits in Petri-dishes and hooking them up to the sensors and actuators of robots. The embodiment provides the stimulus needed for the brain to develop. Because the neurons are in a dish, they can easily be monitored over time, providing a close-up sneak peak into the brain activity.

Robots that have been hooked up to this system include the Koala and Khepera wheeled robots from K-team and a robot artist named MEART (Multi-Electrode Array Art). MEART was built in collaboration with the SymbioticA Research Group and went on tour around the world, drawing pictures based on stimulation from its in-vitro brain and feeding back camera images of its art. After weeks of stimulation, the brain actually calms down, providing insight into the possible treatment of epilepsy.



MEART Robotic Arm

Finally, Potter gives us his take on whether these hybrid living robots (Hybrots), or Animats are more life or machine?

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Podcast team The ROBOTS Podcast brings you the latest news and views in robotics through its bi-weekly interviews with leaders in the field.
Podcast team The ROBOTS Podcast brings you the latest news and views in robotics through its bi-weekly interviews with leaders in the field.





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