The Monthly Microscopical Journal, Vol. 12
| Preis: | 17.95 EUR* (inkl. MWST zzgl. Versand - Preis kann jetzt höher sein!) |
| Versand: | 0.00 EUR Versandkostenfrei innerhalb von Deutschland |
| Partner: | buecher.de |
| Hersteller: | Forgotten Books (Lawson, Henry) |
| Stand: | 2015-08-04 03:50:33 |
Produktbeschreibung
Excerpt from The Monthly Microscopical Journal, Vol. 12: Transactions of the Royal Microscopical Society, and Records of Histological Research at Home and Abroad The pointed process attains, according to the size of its ganglionic body, a length of from 10/100 to 5/100 mm. In its more or less serpentine course it gives off a number of small lateral branches, which soon terminate in the above-mentioned fibrillous nervous network of the granular substance. I have never seen this process terminate in a dark-bordered nerve fibre. From the lateral process, a dark-bordered nerve fibre always arises; it attains a considerable length, and its course is more or less horizontal. A direct communication between two ganglionic bodies by means of these fibres I have never seen; in some cases, however, I have observed them dividing into two branches, the ramifications of which ended in the terminal network. From the basal processes, the nerve fibres of the white substance arise. On ganglionic bodies of medium size, two of these processes are ordinarily seen, one of which is converted into a nerve fibre, while the other divides dichotomously. One of the branches resulting from this division forms also the axis cylinder of a nerve fibre, while the other subdivides into finer branches, which terminate in the network. In the larger ganglionic bodies, even the first basal process divides and gives rise to two axis cylinders. In the upper strata of the cortical layer a considerable number of smaller ganglionic bodies of a more triangular or quadrilateral form are met with. Their delicate processes run about in the same direction, and terminate in the same manner as those of the larger bodies just mentioned. The nerve fibres of the white substance, arising from the basal processes, leave the grey matter in the form of bundles, composed of about eight to ten, or even more nerve fibres of different thickness. Generally, two or three of the fibres, of from 2/600 to 4/600 mm. in diameter are met with in each bundle; the rest are finer fibres, of about 1/600 to 1/500 mm. One portion of the finer fibres appears to arise from the smaller ganglionic bodies of the upper strata, but another arises directly from the terminal nervous network. At first, the bundles of nerve fibres are separated from each other by considerable interspaces; but as others arise from the ganglionic bodies situated below, the interspaces become more narrow, until, at the border of the white substance, they are entirely lost, so that the bundles come to lay contiguous to each other. In tracing the different nervous elements, imbedded in the granular substance of the cortical layer of the cerebrum, from the surface toward the white substance, we first meet with the exceedingly fine, felt-like, fibrillous neuroglia, covering the surface and extending throughout the whole cortical layer to the white substance. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
* Preis kann jetzt höher sein. Den aktuellen Stand und Informationen zu den Versandkosten finden sie auf der Homepage unseres Partners.
Folgende Produkte könnten dir ebenso gefallen
