Publication Date: 2012-05-17 | ISBN-10: 1236098080 | ISBN-13: 9781236098085
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. 1907 Excerpt: ...mater with its arteries and sinuses, the veins of the orbit, and the course of the twelve pairs of cerebral nerves through the dura mater. The left orbit has been opened. Upon the right the tentorium cerebelli has been removed, the commencement of the transverse sinus opened, and the dura mater excised along the emerging nerves and the middle meningeal artery.--Meningeal nerve and anastomosis with the spinal nerve.-Cut edge of tentorium. formation. The root fibers emerge as a number of small bundles from the region of the lateral funiculus. 12. The hypoglossal nerve (Figs. 676 and 677) is also motor, and its nucleus is situated in the trigone of the hypoglossal nerve in the rhomboidal fossa. The root fibers pass ventrally between the medial accessory olive and olive to the groove between the pyramid and olive. THE MEMBRANES OF THE BRAIN. In the brain we recognize the same membranes as in the spinal cord--namely, the dura mater, the arachnoid, and the pia mater. The encephalic dura mater (Figs. 589 and 679 to 681), although it is practically a direct extension of the spinal dura from the foramen magnum, differs from it by being somewhat thicker, and especially because at the same time it forms the inner periosteal layer of the cranium, and is thus formed of two lamina", the periosteal and the dural, which are for the most part completely fused. The dura mater has a shining whitish color and is composed of crossed oblique and longitudinal fibers, and lies closely upon the inner surface of the cranial fossa, of which it takes an exact impression. It varies somewhat in thickness; where it passes through foramina of the skull with vessels and nerves it decreases remarkably in thickness, forming sheaths for the emerging nerves. In addition to forming an inte...
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