This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 Excerpt: ...of the third type pass out of the retina and form the so-called optic nerve, terminating in the thalamus or midbrain. Immediately external to the nervous layer of the retina is the pigment layer (Figs. 99, 100), which is formed from the outer epithelial layer of the secondary optic vesicle (Fig. 97). Figure 99 ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1915 Excerpt: ...of the third type pass out of the retina and form the so-called optic nerve, terminating in the thalamus or midbrain. Immediately external to the nervous layer of the retina is the pigment layer (Figs. 99, 100), which is formed from the outer epithelial layer of the secondary optic vesicle (Fig. 97). Figure 99 illustrates the ten layers of the retina as figured by the older histologists, and Fig. 98 illustrates the relations of some of the nervous elements as revealed by the Golgi method. It is evident that the "nuclear" or "granular" layers are characterized chiefly by the presence of the cell bodies of the neurons and their nuclei, while the "molecular" layers are composed chiefly of the fibrillar nerve-endings which form the synapses between the various groups of neurons. The rods and cones of the retina are the receptors and also the neurons of the first order in the optic path. Their free ends project through the external limiting membrane into the pigment layer. Rays of light which pass through the dioptric apparatus (lens, humors, etc.) of the eyeball must penetrate also the entire thickness of the retina (which is very transparent) before they reach these receptors (Fig. 100). Fig. 98.--Two transverse sections through the mammalian retina: A, Layer of rods and cones; ar, internal arborizations of bipolar neurons related to the cones; ar', internal arborizations of bipolar neurons related to the rods; B, outer nuclear layer; C, outer molecular layer; c, cones; c.c, contact of bipolar neurons with branches of the cone fibers; c.l., bipolar neurons related to cones; c.g., cone granules or nuclei of cones; era., centrifugal nerve-fiber; c.r., contact of bipolar neurons with ends of rod fibers; D, inner nuclear layer; d.s., ...
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New. Sewn binding. Cloth over boards. 390 p. In Stock. 100% Money Back Guarantee. Brand New, Perfect Condition, allow 4-14 business days for standard shipping. To Alaska, Hawaii, U.S. protectorate, P.O. box, and APO/FPO addresses allow 4-28 business days for Standard shipping. No expedited shipping. All orders placed with expedited shipping will be cancelled. Over 3, 000, 000 happy customers.
