A Neuromorphic VLSI System for Modeling the Neural Control of Axial Locomotion

We have developed and tested an analog/digital VLSI system that models the coordination of biological segmental oscillators underlying axial locomotion in animals such as leeches and lampreys. In its current form the system consists of a chain of twelve pattern generating circuits that are capable of arbitrary contralateral inhibitory synaptic coupling. Each pattern generating circuit is implemented with two independent silicon Morris-Lecar neurons with a total of 32 programmable (floating-gate based) inhibitory synapses, and an asynchronous address-event interconnection element that provides synaptic connectivity and implements axonal delay. We describe and analyze the data from a set of experiments exploring the system behavior in terms of synaptic coupling.

[1]  Kwabena Boahen,et al.  Communicating neuronal ensembles between neuromorphic chips , 1998 .

[2]  Girish N. Patel.  A neuromorphic architecture for modeling intersegmental coordination , 1999 .

[3]  Nancy Kopell,et al.  Waves and synchrony in networks of oscillators of relaxation and non-relaxation type , 1995 .

[4]  David E. Schimmel,et al.  A VLSI architecture for modeling intersegmental coordination , 1997, Proceedings Seventeenth Conference on Advanced Research in VLSI.

[5]  Misha Anne Mahowald,et al.  VLSI analogs of neuronal visual processing: a synthesis of form and function , 1992 .

[6]  Shigeo Hirose,et al.  Biologically Inspired Robots: Snake-Like Locomotors and Manipulators , 1993 .

[7]  Paul E. Hasler,et al.  Adaptive circuits using pFET floating-gate devices , 1999, Proceedings 20th Anniversary Conference on Advanced Research in VLSI.

[8]  E. Marder,et al.  Principles of rhythmic motor pattern generation. , 1996, Physiological reviews.

[9]  T. Williams.  Phase coupling by synaptic spread in chains of coupled neuronal oscillators. , 1992, Science.

[10]  Peter Cave,et al.  Biologically Inspired Robots: Serpentile Locomotors and Manipulators , 1993 .

[11]  広瀬 茂男,et al.  Biologically inspired robots : snake-like locomotors and manipulators , 1993 .

[12]  G. Ermentrout,et al.  Modelling of intersegmental coordination in the lamprey central pattern generator for locomotion , 1992, Trends in Neurosciences.

[13]  G. Ermentrout,et al.  Coupled oscillators and the design of central pattern generators , 1988 .