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300 pages, Hardcover
First published October 8, 2015
now believes, as many philosophers have said over the last two thousand years,If you think about that a bit, Koch is claiming that consciousness is a substance, a fundamental property just as atoms or molecules are fundamental properties. That's rather startling, isn't it?
that consciousness is a fundamental, an elementary property of living matter. It can’t be derived from anything else; it is a simple substance. 241
[A sensory event] causes action potential leading into the brain and right up to the neuron in question. Once the neuron has been activated, an electrical charge moves along the neuron's membrane from the receiving end to its terminal, which has synapses to other neurons. Between these neurons is fluid full of calcium ions. The activation of the neuron opens up the tiny channels Eccles describes, and the calcium ions now move into these channels and enter our neuron. Once inside the neuron, the calcium finds and attaches itself to a tiny ball (the synaptic vesicle), which is filled with transmitter molecules--acetylcholine, dopamine, or serotonin, and so on. 65Well, of course the calcium ions attach to synaptic vesicles! (That's assuming the reader has gotten that far.)