. The physiology of the domestic animals; a text-book for veterinary and medical students and practitioners. Physiology, Comparative; Domestic animals. FUNCTIONS OF THE BKAIN. 805 (5) The central lobe, or island of Reil, consists of five or six short, stra'ght convolutions (gyri operti) radiating out and back from the anterior perforated spot, and can only be seen when the margins of the fissure of Sylvius are separated. On the inner surface of each hemisphere is the gyrus fornicatus, or convo- lution of the corpus callosum, which terminates posteriorly in the gyrus uncinatus or gyrus hippocam
. The physiology of the domestic animals; a text-book for veterinary and medical students and practitioners. Physiology, Comparative; Domestic animals. FUNCTIONS OF THE BKAIN. 805 (5) The central lobe, or island of Reil, consists of five or six short, stra'ght convolutions (gyri operti) radiating out and back from the anterior perforated spot, and can only be seen when the margins of the fissure of Sylvius are separated. On the inner surface of each hemisphere is the gyrus fornicatus, or convo- lution of the corpus callosum, which terminates posteriorly in the gyrus uncinatus or gyrus hippocampi. Above is the marginal convolution, which is simply the inner surface of the frontal and parietal convolutions, while the inner surface of the ascending parietal convolution is termed the quadrate lobe, or The parieto-occipital fissure terminates in the calcarine fissure and, running back- ward in the occipital lobe, incloses the wedge-shaped lobule,—the cuneus. The importance of an acquaintance with the principal cerebral convolutions as here sketched will be seen when the functions of the cerebral cortex are —Left Side of the Human Brain (Diagrammatic). (Landois.) F frontal, P parietal, O occipital, T temporo-sphenoidal lobes; S Assure of Sylvius; S' h»ri;on- tal, S" ascending ramus of S; c, sulcus centralis, or fissure of Rolando; A ascending frontal and B ascending parietal convolutions; Fi superior, F* middle, and F3 inferior frontal convolutions; A superior and /2 inferior frontal fissures; /3, sulcus fraecentralis: P, superior parietal lobule; P2> inferior parietal lobule, consisting of Po, supramarginal gyrus, and Po/, angular gyrus; ip, sulcus inter- parietalis ; em, termination of calloso-marginal fissure; 0\ first. 02 second, Og third occipital convolu- tions; po, parieto-occipital fissure: o, transverse occipital fissure; 02, inferior longitudinal occipital fissure; Ti first, To. sphenoidal assures. ijiitnl > secon
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