A reference handbook of the medical sciences, embracing the entire range of scientific and practical medicine and allied science . - of REFERENCE HANDBOOK OF THE MEDICAL SCIENCES and illustrate typical forms assumed bj- these cjtolog-ical elements when specifically stained. The nucleus of nerve ceils, as compared with thatof most other cells in the body, is relatively large butpoor in chromatin or other basophile of the chromatin is usually aggregated into adense globular mass, or false nucleolus (Figs. 855, S66,871). There is in the nucleus also a true nucleoluswhich stains wit
A reference handbook of the medical sciences, embracing the entire range of scientific and practical medicine and allied science . - of REFERENCE HANDBOOK OF THE MEDICAL SCIENCES and illustrate typical forms assumed bj- these cjtolog-ical elements when specifically stained. The nucleus of nerve ceils, as compared with thatof most other cells in the body, is relatively large butpoor in chromatin or other basophile of the chromatin is usually aggregated into adense globular mass, or false nucleolus (Figs. 855, S66,871). There is in the nucleus also a true nucleoluswhich stains with acid dyes, and also a nucleo-protein which exhibits the acidophile reaction, theso-called oxj-chromatin of M. Haidenhain and /. Fig. 864.—Neurofibrils in PjTamidal Cells of the HumanCerebral Cortex, (.\fter Bethe, from van Gehuchtens Sysl^meNerveux.) Nerve cells often contain masses of pigment ( 855) and droplets of fatty or lipoid substances, thesignificance of which is as jet unknown. The supporting elements of the brain bear somerelation to the connective tissue cells and fibers,though they are, for the most part, developed, likethe neurones, from the ectoderm rather than from themesoderm. As will appear beyond, both the neuronesand the neuroglia cells have a common origin from theepithelium of the primitive neural tube. The epen-dyma which lines the ventricles is derived directlyfrom this primary epithelium and its internal limitingmembrane. In the spinal cord and in some of thethinner parts of the brain the ependyma cells retaintheir continuity through the brain substance from the ventricular to the pial surface up to a late embrjonicperiod (Fig. 8S1) or, as in the retina, even to adult
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Keywords: ., bookauthorbuckalbe, bookcentury1900, bookdecade1910, bookyear1913
