United States or Ireland ? Vote for the TOP Country of the Week !
Judging by the analogy of the relation which our central consciousness seems to bear to that of our spinal cord, lower ganglia, etc., it would seem natural to suppose that in whatever superhuman mental synthesis there may be, the neglect and elimination of certain contents of which we are conscious on the human level might be as characteristic a feature as is the combination and interweaving of other human contents.
But work-knowledge is not only in the brain, it is in the senses, in the muscles, in the ganglia of the sympathetic nerves, all over the man, as one may say, as instinct seems diffused through every part of those lower animals that have no such distinct organ as a brain.
Meanwhile out of the remainder, the first six pairs severally unite in the median line, while the rest remain more or less separate. Of these six double ganglia thus formed, the anterior four coalesce into one mass; the remaining two coalesce into another mass; and then these two masses coalesce into one.
*The Peripheral Division.*—The peripheral division of the nervous system includes all the nervous structures found outside of the brain and spinal cord. These consist of the cranial, spinal, and sympathetic nerves, and of various small ganglia, all of which are closely connected with the central system.
He sets off homeward, and if any emotion of sorrow, regret, disappointment, or secret relief troubles his ganglia, no trace of it appears in antennæ, carriage, or speed. I can very readily conceive of his trudging sturdily all the way back to the nest, entering it, and going to the place where he would have dumped his load, having fulfilled his duty in the spirit at least.
A double chain of nervous ganglia, situated chiefly in front of, and on each side of, the spinal column. A sign or token of disease. The liquid which lubricates the joints; joint-oil. It resembles the white of a raw egg. System. A number of different organs, of similar structures, distributed throughout the body and performing similar functions. Systemic.
There remains only the joint between the corselet and the abdomen. The sting, in entering here, has to abolish all movement with a single stab, for any movement would imperil the rearing of the larva. The success of the paralysis, therefore, demands that the motor ganglia, at least the three thoracic ganglia, shall be packed in close contact opposite this point.
What if there were enough ganglia to enable them to dream of their past higher life, in the long intervals of patient waiting! A little lower down we come to the zone of mussels, hanging in clusters like some strange sea-fruit. Each is attached by strands of thin silky cables, so tough that they often defy our utmost efforts to tear a specimen away.
It is one of the functions of vesicular-nervous material to retain traces or relics of impressions brought to it by the organs of sense; hence, nervous ganglia, being composed of that material, may be considered as registering apparatus. They also introduce the element of time into the action of the nervous mechanism.
But in the middle Tertiary the mammal brain began suddenly to enlarge, so that in our time the brain of the horse is more than eight times the size of the brain of his progenitor, the dinoceras of Eocene times. Nature seems to have experimented with brains and nerve ganglia, as she has with so many other things.
Word Of The Day