Volume 2

An introduction to the study of human anatomy / [James Paxton].

  • Paxton, James, 1786-1860
Date:
1831-1834
Catalogue details

Licence: Public Domain Mark

Credit: An introduction to the study of human anatomy / [James Paxton]. Source: Wellcome Collection.

    89/388 (page 75)
    the falx cerebri, it is in a continual state of tension. Its outer circumference contains the lateral sinus, and is connected to the edges of the lateral groove of the occi¬ pital bone. The inner edge corresponds to the cerebral protuberance. The extremities of the tentorium meet at an acute angle, and cross over each other, like the letter X, to be attached to the clinoid processes of the sphenoid bone. The falx cerebelli is a process of the dura mater, which is placed between the lobes of the cerebellum, and is ex¬ tended from the internal occipital protuberance, to the great occipital foramen. The dura mater is evidently fibrous, and its fibres are very apparent in the folds just mentioned, and, in particu¬ lar, at the upper part of the falx cerebri. Some minute nervous filaments have been discovered in the course of the arteries of the dura mater. The blood vessels are not very numerous. The principal branches of the arteries are distributed upon the external surface; minute ramifi¬ cations only being observed on its inner surface. The smaller veins of this membrane accompany the arteries, the larger veins constitute the sinuses which I am about to describe. SINUSES OF THE DURA MATER. The sinuses of the dura mater are merely the large veins of the brain, which are received into triangular canals of the dura mater; they vary in their dimensions, and are disposed in a regular symmetrical manner. They are formed externally by the dura mater, and internally by a smooth membrane, similar to that which is met with in the veins. As they arc constantly stretched in all