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I found our conversation about the evolving model of the nervous system to be very interesting this week. Although I love simplicity and I believe these evolving models heighten our understanding of the nervous system, I feel it is impossible to make a correct model of the nervous system. We can’t restrict our nervous system to a model with inputs, boxes, arrows, and outputs. As we mentioned in class there are some outputs that have no external input. One topic we mentioned in class is the idea that the nervous system can create its own loop cycle of inputs and outputs. Like mcchen, I am also confused about what originally stimulated the nervous system to create an input. What caused the nervous system to originally create this input?   

 I also found our discussion about the neural similarities between invertebrates on the microscopic level very interesting. I was at first very surprised to hear that our neurons are very similar to the neurons of frogs and other invertebrates.  How can two organisms that act so differently have such a similarity? I think this further helps support the idea that even though our neurons are the same the way that they are put together is different.