| General arrangment of the parts composing the celebrum
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As the peduncles of the cerebrum enter the hemispheres, they diverge from one another, so as to leave an interval between them, the interpeduncular space. As they ascend, the component fibres of each pass through two large masses of grey matter called the ganglia of the brain, the thalami optici, and corpora striata, which project as rounded eminences from the upper and inner side of each peduncle. The hemispheres are connected together, above these masses, by the great transverse commissure, the corpus callosum, and the interval left between its under surface, the upper surface of the ganglia, and the parts closing the interpeduncular space, forms the general ventricular cavity. The upper part of this cavity is subdivided into two, by a vertical septum, the septum lucidum; and thus the two lateral ventricles are formed. The lower part of this cavity forms the third ventricle, which communicates with the lateral ventricles, above, and with the fourth ventricle, behind. The fifth ventricle is the interval left between the two layers composing the septum lucidum.
Medicine: The stomach
Critical care
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