Human anatomy, including structure and development and practical considerations . es the fibres which formthe splenium and the adjoining segment of the body of the corpus course outward, downward and backward and as the pars tonporalis and thepars occipitalis reach respectively the hind-]iart of the temporal and the occipitallobes. The fibres destined for the latter region lie within the splenium, fromwhich, as a condensed bundle, the forceps major, they arch backward along theinner wall of the posterior horn of the lateral ventricle (page 1158) into the occipitalcortex. The fib
Human anatomy, including structure and development and practical considerations . es the fibres which formthe splenium and the adjoining segment of the body of the corpus course outward, downward and backward and as the pars tonporalis and thepars occipitalis reach respectively the hind-]iart of the temporal and the occipitallobes. The fibres destined for the latter region lie within the splenium, fromwhich, as a condensed bundle, the forceps major, they arch backward along theinner wall of the posterior horn of the lateral ventricle (page 1158) into the occipitalcortex. The fibres composinjj the corpus callosum probably all terminate in arborizations within thecortex of one or the other of the hemispheres. Their source in the opposite hemisphere, how-ever, is by no means always the same, since they may arise: (i) as the axones of the pyramidal orof the polymorphic cells; (2) as the collaterals of association fibres; or (3) as collaterals of projec-tion fibres, in the last two cases being, therefore, of the nature of association-fibres rather than of. Diagram showing commissural fibres passing betweencerebral hemispheres by way of corpus callosum (CC) an-terior commissure {AC), and hippocampal commissure(HC). THE TELENCKIIIALON. 1185 strictly commissural ones. Iiuiced, with tlic more exact ami extciuleil study iA the corpuscallosum, it becomes more and more evident that the composition and relaticjns of tiiis j^rcatbridge are very intricate and complex, and that it receives contributions frou) a nuuii largernumber of and more diverse sources than was formerlv recognized. The observations of !•,. A. Spitzka upon the si/e and sagittal area of the corpus callosumhave conferred additionalinterest upon this struc-ture as a possible indexas to intellectual develop-ment. The examinationof a series of brainswhich included .some frommen of acknowledgedintellectual superiority,demonstrated a corpuscallosum of unusual areaas a constant feature in thebrains oi
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Keywords: ., bookauthormc, bookcentury1900, bookdecade1910, booksubjectanatomy
