Abstract
One way to understand a neurobiological system is by building a functional
model that replicates its behavior in real-time using similar
constraints. Analog {\bf V}ery {\bf L}arge {\bf S}cale {\bf I}ntegrated
(VLSI) electronic circuit technology provides such an enabling technology.
We here describe a neuromorphic system that is part of a long-term effort
to
understand the primate oculomotor system. It requires both fast sensory
processing as well as fast motor control to interact with the world.
A one-dimensional hardware model of the primate eye has
been built which simulates the physical dynamics of the biological system.
It is driven by analog VLSI circuits mimicking the brainstem and cortical
circuits that control eye movements. Our oculomotor plant demonstrates
both
smooth pursuit movements, driven by a retinal velocity error signal, as
well
as saccadic eye movements, controlled by retinal position error, and can
reproduce behavioral, stimulation, lesion, and adaptation experiments
performed on primates.
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