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.

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    forwards, named the pituitary stem,d It passes under the commissure of the optic nerve, and terminates in a small body, situated in the pituitary fossa of the sphenoid bone. The pituitary bodye is the small organ just alluded to. It has not the vascular structure peculiar to glands, but is composed of two portions: the first is of a grayish, yellow colour; the second is soft, and impregnated with a whitish visced fluid. The pituitary body, in the adult, generally contains small calculus concretions. The corpora albicantia are situated behind the cineri- tious tubercle; they consist of two small bodies of the form and size of peas, which are white externally, and of a gray colour internally ; they are united to each other by a small grayish band, which contributes to form the floor of the third ventricle. THE EXTERIOR OF THE CEREBELLUM. The cerebellum is situated in the inferior fossee of the occipital bone, under the posterior lobes of the cerebrum, and is separated from those lobes by the tentorium. It is about a sixth part of the size of the cerebrum, and has been compared to two depressed spheroids, placed beside each other on a horizontal plane. These are divided pos¬ teriorly by the falx minor. The surface of the cerebellum presents an assemblage of gray laminae, over which the arachnoid membrane passes. Each lobe commonly has from sixty to sixty-five of these laminae. But, on sepa¬ rating these principal laminae, we perceive many other smaller, concealed in the grooves, and partly covering each other. •* Formerly denominated the infundibulum. • Formerly denominated the pituitary gland.