Murray, Alan

Huo, Juan

Engineering and Physical Sciences Research Council (EPSRC)

Doctoral Training Center(DTC)

2011-02-02T11:36:02Z

2011-02-02T11:36:02Z

2010

Adaptation is one of the basic phenomena of biology, while adaptability is an important feature for neural network. Young barn owl can well adapt its visual and auditory integration to the environmental change, such as prism wearing. At first, a mathematical model is introduced by the related study in biological experiment. The model well explained the mechanism of the sensory map realignment through axongenesis and synaptogenesis. Simulation results of this model are consistent with the biological data. Thereafter, to test the model’s application in hardware, the model is implemented into a robot. Visual and auditory signals are acquired by the sensors of the robot and transferred back to PC through bluetooth. Results of the robot experiment are presented, which shows the SC model allowing the robot to adjust visual and auditory integration to counteract the effects of a prism. Finally, based on the model, a silicon Superior Colliculus is designed in VLSI circuit and fabricated. Performance of the fabricated chip has shown the synaptogenesis and axogenesis can be emulated in VLSI circuit. The circuit of neural model provides a new method to update signals and reconfigure the switch network (the chip has an automatic reconfigurable network which is used to correct the disparity between signals). The chip is also the first Superior Colliculus VLSI circuit to emulate the sensory map realignment.

http://hdl.handle.net/1842/4762

en

The University of Edinburgh

J.Huo, Alan Murray, ”The Adaptation of Visual and Auditory Integration in the Barn Owl Superior Colliculus with Spike Timing Dependent Plasticity”, Neural Networks, 22(7):913-21, 2009

J. Huo, A.F. Murray; ”The Role of Membrane Threshold & Rate in STDP Silicon Neuron Circuit Simulation”, Lecture Notes in Computer Science, 3697/2005, 1009-1014, 2005

J. Huo, Martin Reekie, A.F. Murray; ”Silicon Superior Colliculus for the Integration of Visual and Auditory Information with Adaptive Axon Connection”, ISCAS (IEEE International Symposium on Circuits and Systems) 2009, May

adaptability

superior colliculus

sensory maps

STDP

inhibitory network

axon growth cone

Adaptive map alignment in the superior colliculus of the barn owl: a neuromorphic implementation

Thesis or Dissertation

Doctoral

PhD Doctor of Philosophy