Your best friend, Fred, was injured when he fell several meters from a cliff, but his vital signs are stable and all lacerations have been repaired. His physician is in the process of determining what neural damage he has sustained. What may be damaged if Fred is unable to walk normally? (Hint: Consider various types of factors that influence motor output, as well as the structures immediately
responsible for movement.)
What will be an ideal response?
Walking normally will depend upon sensory as well as motor control structures. Damage to leg nerves and muscles could impair walking, as could damage to spinal cord areas that control the muscles, and spinal cord areas that mediate relevant sensation from legs and feet. Damage to the spinal tract to and from the brain could interfere with brain influences on walking. Motor control areas in the brain that could be damaged include the cerebellum, pons, basal ganglia, and cerebral cortex. Also, damage to any area containing tracts to and from motor control areas could prevent normal signals from influencing motor output.
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