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Its secretion must act upon the great basal ganglia, at the base of the brain, which contain the nerve cells and fibres that are the centers of emotional control and co-ordination. By intellectuality we mean the capacity of the mind to control its environment by concepts and abstract ideas. The frontal lobes of the brain are the central offices for higher thought.
From the foregoing considerations, we believe, may be again inferred, first, that the radical difference which exists between the cerebral operations that result in thought, and those that accompany the evolution of emotion, probably depends upon the fact, that in the former central nervous action remains more or less localized on the surface of the cerebral hemispheres, while, in the latter, the great ganglia lying at the base of the brain, and hence nearer the vaso-motor centre, are called into play; second, that the effects of such action are more rapidly generalized throughout the nervous system, and, by causing the dilatation of the blood-vessels in the manner described, exhaust the central nervous system in a twofold manner, by a disturbance of its circulation, and by a direct depression of its nutrition, when the modifications of the circulation exaggerate the nutrition elsewhere.
In course of time there arose on one side an industrial system in which the plantation principle, race-rule and race-slavery, were organic centers; and, on the other, a social system in which the principle of popular power and government, the town meeting, and the common school were the ganglia of social expansion. Contrary ideas beget naturally enough contrary interests and institutions.
As a consequence of division of labour, there have here been developed various sense-organs as organs of specific sensibility, muscles as organs of motion and volition, nerve-centres or ganglia as central co-ordinating and regulating organs. In the most highly developed families of the animal kingdom, these last come more and more into the foreground as independent soul-organs.
They are connected on either side by the right and left sympathetic nerves which extend vertically from ganglion to ganglion. The sympathetic ganglia receive nerves from the central division of the nervous system, but connect with glands, blood vessels, and the intestinal walls through fibers from their own cell-bodies.
The traffic of the main roads spread into branch roads which ended in the ganglia of supply depots, all kept in touch by the network of wires focussing through different headquarters to Westerling. In this conquered territory with its face of desolation there were no fighting men except reserves or convalescents on their way to the front.
The substance of both the spinal cord and the brain is made up of millions of delicate, tiny cells, called neurons, most of which, with very long branches, are arranged in chains for carrying messages, forming the white matter; while the others lie in groups, or ganglia, for sorting and deciding upon messages, forming the gray matter.
The inference drawn from this sudden inertia is inevitable: the Wasp has stabbed the cervical ganglia. Hence the immediate cessation of movement in all the organs of the head; hence the real instead of the apparent death of the Bee. The Philanthus is a butcher and not a paralyser. This is one step gained.
The words were still ringing in the air, when Arlt came into the room. They were still ringing in Bobby's ears, ten minutes later, when he and Sally took their leave. "My mental ganglia are cleared," Bobby said disconsolately, as they went down the steps. "I now see that there is precisely one thing for us to do, and only one." "What is that?" "To grin and bear it."
The nervous system consists of a large supra-oesophageal ganglion in the first segment; then of a chain of ganglia, one to each segment, on the ventral side of the body. With one ganglion in each segment there is far more controlling, perceptive, ganglionic material than in lower worms.
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