Schedule
Aug 03, 2001
Persistent Activity: VOR and Head Direction
Dr. Sebastian Seung
http://hebb.mit.edu/people/seung/
In computational models of motor control, navigation, and decision
making, a number of researchers have hypothesized the existence of
brain modules that integrate in the sense of Newtonian calculus.
Physiologists have had some success in localizing these
integrators to particular brain areas. For example, there is a
brainstem area that converts saccadic and other velocity signals
into changes in eye position. There are also rodent brain areas
that convert vestibular and efference copy inputs into changes in
an internal representation of head direction, which may be
important for dead reckoning. By definition, an integrator is able
to maintain its state in the absence of input, and hence, can be
regarded as an analog short- term memory system. This lecture will
discuss theoretical models proposed to explain the mechanisms of
neural integration, and compare them with the experimental facts.
Audio for this talk requires sound hardware, and RealPlayer or RealAudio
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First part of lecture
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Second part of lecture
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