Image d'archive à partir de la page 704 de la cyclopaedia de l'anatomie et. La cyclopaedia de l'anatomie et physiologie cyclopdiaofana03todd Année : 1847 les centres nerveux. (L'ANATOMIE HUMAINE. L'encéphale.) 691 transcrites à Tarin et Malacarne. Lorsque le quatrième ventricule a été soigneusement ouvert dans une récente le cervelet, il est très facile de démontrer en adoptant le manche d'un couteau sous eux. La structure de ces ailes latérales de la médullaire est inférieure velum déterminer facilement. Leur finesse est telle qu'ils admettent d'être examiné par le microscope, sans pression ou autre manipulation. Ils consis

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Archive image from page 704 of The cyclopædia of anatomy and. The cyclopædia of anatomy and physiology cyclopdiaofana03todd Year: 1847 NERVOUS CENTRES. (HUMAN ANATOMY. THE ENCEPHALON.) 691 scribed by Tarin and Malacarne. When the fourth ventricle has been carefully opened in a recent cerebellum, it is very easy to demon- strate them by passing the handle of a knife under them. The structure of these lateral wings of the inferior medullary velum is readily ascertained. Their delicacy is such that they admit of being examined by the microscope without pressure or other manipulation. They consist of tubular fibres of various sizes, taking a transverse di- rection, that, namely, of the long diameter of each wing, covered by a layer of nucleus-like particles as an epithelium. They seem to con- nect the nodule to the small lobules of the pneumo-gastric nerve above mentioned (the jftocks of Reil), or to connect those lobules them- selves as a commissure. The nodule pushes before it, into the fourth ventricle, a fold of the pia mater, connected with which on either side are several small granulations, or Pacchionian bodies. It is called the choroidplexus of the fourth ventricle. We can easily trace it to be continuous with the pia mater which covers the lobules of the seventh pair of nerves. Next to the nodule, below and behind it, is a small lobe, called by Reil the spigot ( Zupfen), with a pointed extremity directed downwards and forwards. It consists of several small la- mina separated by their fissures. Behind it is a larger lobule, which forms the most prominent portion of the inferior vermiform process, called by Reil, from its form, the pyramid. Its apex is directed downwards and backwards, and it likewise consists of numerous small laminae. These lobules of the inferior portion of the median lobe serve to connect others of the lateral hemispheres. The spigot connects the almond-like lobes; the pyramid the biventral and the slender lobes. Posterior to the pyramid

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