Lecture VI

Let us now try to picture the third man in such a way that in it too we discover a kind of brain. As you know, there is in man a third system of nerves, distinct from those of the brain and of the spinal cord. It is the sympathetic nervous system, the so-called solar plexus, situated in the lower part of man and sending its fibres upwards, parallel with the spinal cord. It is a nervous system that is separate from the other two and, in relation to the brain proper, may be regarded as a peculiar, undeveloped brain, When we follow the human form upwards beyond Libra we find this remarkable sympathetic nervous system, the solar plexus, extended like a brain of the third man. With the special organs we have already enumerated there is thus connected also what we have to regard as a kind of third brain,—the solar plexus.