Brain and mind; or, Mental science considered in accordance withthe principles of phrenology, and in relation to modern physiology . iheparietal and occipital bones by sutures. The lower backpart of these bones forms the projection directly behindthe ear, which is called Xht^mastoid process. The Occipitalbone forms the base and back part of the cranium, immedi-ately above the neck. It is joined to the two parietal bonesby what is called, from its resemblance in shape to theGreek letter Lambda, the lambdoidal suture. In the cen-tral region of this bone a protuberance is found, which isknown as
Brain and mind; or, Mental science considered in accordance withthe principles of phrenology, and in relation to modern physiology . iheparietal and occipital bones by sutures. The lower backpart of these bones forms the projection directly behindthe ear, which is called Xht^mastoid process. The Occipitalbone forms the base and back part of the cranium, immedi-ately above the neck. It is joined to the two parietal bonesby what is called, from its resemblance in shape to theGreek letter Lambda, the lambdoidal suture. In the cen-tral region of this bone a protuberance is found, which isknown as the occipital spine. 56 BRAIN AND MIND. The Sphefioid, or wedge-like bone, is situated in the an-terior of the temporal region. And the Ethmoid (meaningsieve-like) is a cellular bone, situated between the orbitsat the root of the nose. The greater part of the skull is made up of two plates,between which is interposed a honeycomb substance calledthe diploe, through which small blood-vessels course to dif-ferent parts of the skull. The diploe is of nearly uniformthickness, so that the two tables of the skull are Organic Development — To Estimate It,—The dif-ferent organs or centers of mental function may be said tohave their origin in the medulla oblongata, and to corre-spond in size or development with the length of theirfibers. The size, then, of a mental organ may be esti-mated by the distance of its place in the brain cortex fromthe medulla oblongata. The greater this distance, thegreater the expansion and depth of the organ. A line STRUCTURE OF BRAIN AND SKULL. 57 projected from the opening of one ear to that of the otherthrough the head will pass through the anterior of themedulla oblongata, so that in the living head we may takethe opening of the ear as the centre or starting-point inthe measurement of organs. Let C in Fig. 15 denote theopening of the ear, then C A will indicate the develop-ment of the brain anteriorly; CM its development inthe upper o
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectphrenology, bookyear1
