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If any offered to hide himself amongst the thickest of the vines, he laid him squat as a flounder, bruised the ridge of his back, and dashed his reins like a dog. If any thought by flight to escape, he made his head to fly in pieces by the lamboidal commissure, which is a seam in the hinder part of the skull.
The inferior fissure does not extend as far as the gray commissure, leaving the lateral inferior columns connected by a white commissure. There are certain centres in the spinal cord that are capable of carrying on certain reflex actions independent of the chief centre in the brain. The white matter of the cord is made up of paths over which impulses to and from the brain are transmitted.
Intermediate between them, or rather beside them and overlapping the commissure, is a third category whose life articulates loosely with both the others at the same time that it still runs along in a semi-detached way. This slighter but more visible, and particularly more audible, category is made up of the "Intellectuals," as a late, and perhaps vulgar, designation would name them.
A step higher in the scale, among the placental Mammals, the structure of the brain acquires a vast modification not that it appears much altered externally, in a Rat or in a Rabbit, from what it is in a Marsupial nor that the proportions of its parts are much changed, but an apparently new structure is found between the cerebral hemispheres, connecting them together, as what is called the 'great commissure' or 'corpus callosum. The subject requires careful re-investigation, but if the currently received statements are correct, the appearance of the 'corpus callosum' in the placental mammals is the greatest and most sudden modification exhibited by the brain in the whole series of vertebrated animals it is the greatest leap anywhere made by Nature in her brain work.
Hamilton, of Aberdeen, claims that the corpus callosum is not a commissure, but the decussation of cortical fibers on their way down to enter the internal and external capsules of the opposite side. Profs.
In such a case, we see no reason why a wire muzzle, such as used by us after the operation for Entropium, might not be worn for an indefinite period, without any inconvenience to the animal. The caruncula lachrymalis is a small glandular body situated at the internal commissure of each eye.
The gray tissue is situated within the white, and it is arranged in the form of two lateral comma-shaped columns connected by a narrow commissure of gray matter. The extremities of the lateral gray columns mark the origin of the superior and inferior roots of the spinal nerves. The white tissue of the cord is also divided into lateral portions by superior and median fissures.
A step higher in the scale, among the placental Mammals, the structure of the brain acquires a vast modification not that it appears much altered externally, in a Rat or in a Rabbit, from what it is in a Marsupial nor that the proportions of its parts are much changed, but an apparently new structure is found between the cerebral hemispheres, connecting them together, as what is called the 'great commissure' or 'corpus callosum. The subject requires careful re-investigation, but if the currently received statements are correct, the appearance of the 'corpus callosum' in the placental mammals is the greatest and most sudden modification exhibited by the brain in the whole series of vertebrated animals it is the greatest leap anywhere made by Nature in her brain work.
Then at one stroke he cut off his head, cutting his scalp upon the temple-bones, and lifting up in the upper part of the skull the two triangulary bones called sincipital, or the two bones bregmatis, together with the sagittal commissure or dartlike seam which distinguisheth the right side of the head from the left, as also a great part of the coronal or forehead bone, by which terrible blow likewise he cut the two meninges or films which enwrap the brain, and made a deep wound in the brain's two posterior ventricles, and the cranium or skull abode hanging upon his shoulders by the skin of the pericranium behind, in form of a doctor's bonnet, black without and red within.
In fact, the ganglionic corpuscles of each eye may be considered as constituting a little brain, connected with the masses behind by the commissure, commonly called the optic nerve. We are prepared, therefore, to find these two little brains in the most intimate relations with each other, as we find the cerebral hemispheres.
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