lecture9 sq key - Short Answers to Lecture 9 Study...

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Short Answers to Lecture 9 Study Questions 1. The spinal cord is at the bottom of the motor control hierarchy of the CNS, and pre- frontal cortex is at the top. a. Why does the spinal cord specialize in feedback control? The spinal cord does not have appropriate information to predict or anticipate disturbances. Its sensory inputs are from the surface of the body, muscles and joints (proprioception rather than exteroception). Although it does have the wiring to do sophisticated control (central pattern generators for locomotion, for example), it doesn’t have the inputs to allow feedforward control. b. Why does the pre-frontal cortex specialize in feedforward control? The prefrontal cortex is the site of executive control. For its executive functions, it needs to predict the future and anticipate disturbances. Also, feedback control requires up-to-date feedback, and the prefrontal cortex delays due to complex processing would make the feedback control too slow. Prefrontal cortex is like a command center for controlling action at a great distance (e.g. for driving the Mars
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This note was uploaded on 02/21/2010 for the course IB 132 taught by Professor Brooks during the Spring '08 term at University of California, Berkeley.

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lecture9 sq key - Short Answers to Lecture 9 Study...

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