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The imperfect definition of this fissure in the majority of human brains, as compared with its remarkable distinctness in the brain of most Quadrumana, is owing to the presence, in the former, of certain superficial, well marked, secondary convolutions which bridge it over and connect the parietal with the occipital lobe.
Years ago I was a freethinker, now my discoveries have made me a deist; for I found that my cells, living as they were, and possessing undoubted parietal circulation, were not germs; and though they might cluster into a bulk like this, as bubbles do to form froth, to evolve an animal or plant from them was far beyond me; that needs what we call soul.
If, in the course of abdominal operations, rough manipulations of the parietal peritoneum be made, there will be frequently observed a marked increase in the respiratory rate and an increase in the expiratory force which may be marked by the production of an audible expiratory groan.
Analogy would indicate that other sensations follow the same law, hence the probability is that all the sensations from one side of the body do not pass to the parietal cortex of the opposite side, but that, while the majority so pass, a portion go up to the cortex of the same side from which they come. Dr.
Many investigators have made experiments in relation to this subject, and most of them have found that complete castration is difficult, and that portions of the testes left in the bird during the operation become grafted in some other position either on the parietal peritoneum, or on that covering the intestines, and produce spermatozoa, which, of course hare no outlet.
While a considerable number of syphilitic children grow up without showing any trace of their syphilitic inheritance, the majority retain throughout life one or more of the following characteristics, which may therefore be described as permanent signs of the inherited disease: Dwarfing of stature from interference with growth at the epiphysial junctions; the forehead low and vertical, and the parietal and frontal eminences unduly prominent; the bridge of the nose sunken and rounded; radiating scars at the angles of the mouth; perforation or destruction of the hard palate; Hutchinson's teeth; opacities of the cornea from antecedent keratitis; alterations in the fundus oculi from choroiditis; deafness; depressed scars or nodes on the bones from previous gummata; "sabre-blade" or other deformity of the tibiæ.
He handed me his notebook, and I wrote down as he dictated: "A clean-punched circular hole in skull, an inch behind and above margin of left ear diameter, an inch and seven-sixteenths; starred fracture of parietal bone; membranes perforated, and brain entered deeply; ragged scalp-wound, extending forward to margin of left orbit; fragments of gauze and sequins in edges of wound.
Professor Virchow came to the same conclusion with regard to a skull from a Neolithic tomb which bore on the right parietal traces of an ancient cicatrized wound. He also tells us of the finding in Poland of a round piece of skull which had evidently been worn as an amulet. In the north of Europe similar discoveries have been made.
The frontal bone forms the forehead and front of the head. It is united with the two parietal bones behind, and extends over the forehead to make the roofs of the sockets of the eyes. It is this bone which, in many races of man, gives a dignity of person and a beauty of form seen in no other animal. The parietal bones form the sides and roof of the skull.
And when a tooth in the lower-jaw is the cause of headach, a pain sometimes affects the tendons of the muscles of the neck, which are attached near the jaws. But the clavus hystericus, or pain about the middle of the parietal bone on one side of the head, I have seen produced by the second of the molares, or grinders, of the under-jaw; of which I shall relate the following case.
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