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Updated: July 13, 2025
Every part has its special duty to perform. The part of the brain which lies in front of the ears has a different function from that which lies behind them. The parietal lobes of the brain are not placed in the skull for the same purposes which the frontal and occipital lobes represent. Every fibre has its function, every convolution its purpose.
In no case, however, are either the frontal or the temporal sulci the earliest. As a rule the occipito- parietal is the earlier of the two. At the latter part of this period, another sulcus, the "posterio- parietal," or "Fissure of Rolando" is developed, and it is followed, in the course of the sixth month, by the other principal sulci of the frontal, parietal, temporal and occipital lobes.
The "oblong marrow"; that portion of the brain which lies upon the basilar process of the occipital bone. Meibomian. A term applied to the small glands between the conjunctiva and tarsal cartilages, discovered by Meibomius. Membrana Tympani. Literally, the membrane of the drum; a delicate partition separating the outer from the middle ear; it is sometimes popularly called "the drum of the ear."
Its contours and measurements agree very well with those of some Australian skulls which I have examined and especially has it a tendency towards that occipital flattening, to the great extent of which, in some Australian skulls, I have alluded. But all Australian skulls do not present this flattening, and the supraciliary ridge of the Engis skull is quite unlike that of the typical Australians.
The signs of overaction of digitalis are nausea, vomiting, a diminished amount of urine, a tight, band-like feeling around the head, perhaps occipital headache and coldness of the hands and feet, or frequently of one extremity only, combined with a feeling of numbness. The pulse is generally reduced to sixty or less a minute. Such symptoms require that digitalis be immediately stopped.
The line 'b' indicates the plane of the tentorium, which separates the cerebrum from the cerebellum; 'd', the axis of the occipital outlet of the skull.
We are told, and with perfect truth, that in man the occipital foramen the aperture through which the brain is connected with the spinal cord is so placed that the head is nearly in equilibrium when he stands upright.
The length from the end of the nose to the point between the eyes should be about equal, or preferably of greater length than from this point to the back of the occiput. SKULL The skull should be flat rather than domed, and have a slight indentation running up the centre, the occipital peak not prominent. There should be a decided rise or brow over the eyes, but no abrupt stop between them.
The wound showed that the ball struck the skull and plowed along under the scalp for several inches before emerging, but it did not even knock the negro down, and no unconsciousness followed later. I once examined an express-messenger who had been shot in the occipital region by a weapon of similar size, while seated at his desk in the car.
But on the tentorium rests, as I have said in the preceding Essay, the posterior lobe of the brain; and hence, the occipital protuberance, and the curved line in question, indicate, approximately, the lower limits of that lobe. Was it possible for a human being to have the brain thus flattened and depressed; or, on the other hand, had the muscular ridges shifted their position?
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