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So, yea Christopher Reeves was paralyzed from the neck down I believe. I was thinking more and more about this phenomenon and began to put it in terms of the input/output processing that our body does. Could Christopher Reeves be an example of how we as beings produce inputs without and outputs, or perform an output without receiving an input? I think it may be possible.  His arms and legs, or any part of his body below the neck may be receiving cues from both the environment and the cellular world on the inside of his body, but no output is produced because the connections have been severed, or because the brain just cannot process it (due to brain damage or what have you). So, like the leech, we too in a more simplistic sense, can produce these inputs and outputs independently, or at least it seems. 

Jayme E. Hopkins, '08