movement what do we really know
Although we think of our brain as being important for controlling our behaviors, this is not always the case. Studies have been conducted in a wide range of animals, including frogs and cats, to characterize to what extent motor tasks such as walking, swimming, and jumping are affected by severing the spinal cord at the level of the brain stem. These studies indicate that the movements remain intact and seem normal. What is lost is the ability to initiate or terminate the movement in response to external stimulation.
What does this tell us about the control of movement? At what level of the nervous system are these simpler, more automatic movements controlled? A video of a decerebrate cat is available online atDecerebrate Cat walks and exhibits multiple gait patterns
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