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When a child learns to walk, it learns almost entirely from the solar plexus and the lumbar ganglion, the cardiac plexus and the thoracic ganglion balancing the upper body. There is a perfected circuit of polarity. The two lower centers are the positive, the two upper the negative poles.
This is the first faint and dim prophecy of a brain, and it sends its nerves to the front end of the body. But there run from it to the rear end of the body four to eight nerve-cords, consisting of bundles of nerve-threads like our nerves, but overlaid with a coating of ganglion cells capable of originating impulses.
That is not all; the sting wanders over the cricket's belly, this time seeking the joint between the neck and the thorax; it finds it, and is again thrust in with fury; a second ganglion of the nervous chain is thus perforated and poisoned. After these two wounds the victim is completely paralysed. As already mentioned, several facts enable us to recognise that the Cricket is by no means dead.
I regret that my anatomical knowledge leaves me undecided on this point. Are the fangs actuated by a special ganglion? Are they actuated by fibres issuing from centres exercising further functions? I leave to anatomists equipped with more delicate instruments than I the task of elucidating this obscure question.
When the neuralgia involves branches of two or of all three trunks, or when it has recurred after temporary relief following resection of individual branches, the removal of the semilunar ganglion, along with the main trunks of the maxillary and mandibular divisions, should be considered.
But the delicate nose advances always into the air, our palpable communicator with the infinite air. Thus it has its first delicate root in the cardiac plexus, the root of its intake. And the root of the delicate-proud exhalation, rejection, is in the thoracic ganglion. But the nostrils have their other function of smell.
Without sight or scent or hearing the powerful magnetic current vibrates from the hypogastric plexus in the female, vibrating on to the air like some intense wireless message. And there is immediate response from the sacral ganglion in some male. And then sight and day-consciousness begin to fade.
And I, who am a bit deaf myself, and may in the end have a deaf-machine to poke at my friends, it ill becomes me to be so unkind, yet that's how I feel. So there we are. Help me to be serious, dear reader. In that little book, "Psychoanalysis and the Unconscious," I tried rather wistfully to convince you, dear reader, that you had a solar plexus and a lumbar ganglion and a few other things.
One wonders whether, throughout the long hours, weeks and months, in darkness which renders her eyes a mockery, there ever comes to her dull ganglion a flash of memory of The Day, of the rushing wind, the escape from pursuing puff-birds, the jungle stretching away for miles beneath, her mate, the cool tap of drops from a passing shower, the volplane to earth, and the obliteration of all save labor.
So, while the artistic tendency may be a universal nervous system, artists are inclined to ganglionate. The nerve-knots vary in size and importance, and one chief ganglion may serve as a feeding brain, but it cannot monopolize the activity. In America, particularly, these ganglia, or colonies, are an interesting and vital phase of our development.
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