The morphology and evolutional significance of the pineal body : being part I of a contribution to the study of the epiphysis cerebri with an interpretation of the morphological, physiological and clinical evidence . and. By the Weigert method he foundthe nerve fibers from the following sources: 1) internal capsule,2) striae medullares, 3) Meynerts bundle, 4) optic tract, and5) posterior commissure. Meynert271 and Pawlowsky806 havealready noted the connection between the posterior commissureand the pineal body. Henle172B in 18S7 considered the pinealbody as a lymphatic ganglion. Its parenchyma
The morphology and evolutional significance of the pineal body : being part I of a contribution to the study of the epiphysis cerebri with an interpretation of the morphological, physiological and clinical evidence . and. By the Weigert method he foundthe nerve fibers from the following sources: 1) internal capsule,2) striae medullares, 3) Meynerts bundle, 4) optic tract, and5) posterior commissure. Meynert271 and Pawlowsky806 havealready noted the connection between the posterior commissureand the pineal body. Henle172B in 18S7 considered the pinealbody as a lymphatic ganglion. Its parenchyma consisted oftwo types of cells, , round cells resembling lymph corpusclesand angular cells with many points. THE PINEAL BODY 161 Ellenberger (87)HO maintains that the pineal body in thehorse is very similar to a lymphatic gland. It is highly vascular;in it are but a few nerve fibers and these are difficult to trace totheir origin. Flesch (88)123 studied the pineal body in thehorse, pig, dog, bat, and man. He was able to find brain sandin man only. He does not believe that the organ is rudimentary,but regards it as an epithelial structure. There are some nerve •<. ^m$tf&&$xwz! s-^^-^^S^^^^^ss. Fig. 77 Follicles and parenchyma of pineal body in man, showing concretionof brain sand, according to Henle, 1879. fibers in it. Its relation to the size of the brain is not has, in Fleschs opinion, a physiological action in mammals,is very vascular, while its specific cells contain pigment seems to be a secretory organ and may contain a heat-regulat-ing centre. Edinger (97)m found the pineal body in the higher mammalsto be formed of neuroglia cells. True nerve elements areabsent. Chauveau (85)64 observed groups of polyhedral cells MEMOIR NO. 9 FREDERICK TILNEY AND LUTHER F. WARREN separated by connective-tissue trabeculae. He also mentionscalcareous deposits in domestic animals. IMingazzini (89)276believes the pineal elements resemble lymphatic corpuscles
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherphila, bookyear1919
