LIFESCI 3K03 Lecture Notes - Lecture 21: Basal Ganglia, Cerebellum, Efference Copy
27 Feb 2018
School
Department
Course
Professor
Document Summary
For self generated movements, a predictor can use an efference copy of the motor command to anticipate the consequence of the motor command. For externally-generated movements there is an extra source of sensory information from the senses" perspective, a combined source of information. State estimation = knowing our body"s state the positions and velocities of our body segments is fundamental for accurate motor control. However, sensory signals are subject to delays from processing and transduction, and they are not perfect and contain noise in the signals. Estimating state using prediction based on motor commands reduces this noise, but the estimate will drift over time if the forward model is not perfect. By combining sensory feedback and motor prediction to estimate the current state we can minimize these drawbacks. Then there is the graph of the actual generated motor command. We can"t predict everything from the outside world, so we need to distinguish internal from external events.
