Schedule Jul 25, 2001
Simple Feedback Networks: Central Pattern Generators an Recurrent Excitation
Dr. Larry Abbott
http://www.bio.brandeis.edu/pages/faculty/abbott.html
The goal is to describe the common themes in the process of rhythmic motor output, as occurs in respiration, oral tasks like chewing, licking, and whisking, and motor tasks like walking and swimming. Two aspects of motor control are presented. First, the general rhythmic patterns at the single cell or small network level, and second, the interaction among oscillators to form ungulatory motions, as occurs in swimming. The connection between the experimental data and biophysically-based as well as abstract models will be discussed. Particular emphasis will be placed on four systems: gustation in the crab as an example of a network oscillator under the control of cellular properties, swimming in Tritonia as an example of a purely network oscillator, swimming in the lamprey as an example of interacting network oscillators, and respiration in the rodent as an example of a multi-state oscillator.

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