Inhaltsangabe
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 Excerpt: ...inferior surface. The internal occipital border separates the internal surface from the tentorial area of the inferior surface, and it extends from the occipital pole to the splenium of the corpus callosum. The exterior of each hemisphere is broken up into tortuous eminences, called gyri or convolutions, and these are separated from each other by clefts, called sulci or fissures. The exterior is composed of grey matter, which is spoken of as the cerebral cortex, and the interior is occupied by white matter, which forms the medullary centre. The breaking up of the hemispheres into gyri, with the intervening sulci, greatly increases the amount of cerebral cortex and, to a proportionate extent, of pia mater. The fissures are of two kinds, complete and incomplete. The complete fissures are produced by invaginations of the wall of each cerebral vesicle; and the incomplete fissures are due to the growth of the gyri. Each hemisphere presents six principal fissures, called interlobar fissures, and by means of these it is divided into six lobes. The fissures and lobes are as follows: Interlobar Fissures. Lobes. 1. Fissure of Sylvius. I. Frontal. 2. Fissure of Rolando. 2. Parietal. 3. Parieto-occipital. 3. Occipital. 4. Calloso-marginal. 4. Temporal. 5. Collateral. 5. Island of Reil or Insula. 6. Circular or Limiting. 6. Limbic. Interlobar Fissures.--The fissure of Sylvius, which is the first fissure to appear in the course of development, commences on the inferior surface of the hemisphere at the locus pcrforatus anticus in a depression, called the vallecula Sylvii. From this point it passes horizontally outwards to the Sylvian point on the external surface of the hemisphere, where it divides into three diverging branches. It is a deep cleft, which is overhung poste...
Die Inhaltsangabe kann sich auf eine andere Ausgabe dieses Titels beziehen.
Reseña del editor
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 Excerpt: ...inferior surface. The internal occipital border separates the internal surface from the tentorial area of the inferior surface, and it extends from the occipital pole to the splenium of the corpus callosum. The exterior of each hemisphere is broken up into tortuous eminences, called gyri or convolutions, and these are separated from each other by clefts, called sulci or fissures. The exterior is composed of grey matter, which is spoken of as the cerebral cortex, and the interior is occupied by white matter, which forms the medullary centre. The breaking up of the hemispheres into gyri, with the intervening sulci, greatly increases the amount of cerebral cortex and, to a proportionate extent, of pia mater. The fissures are of two kinds, complete and incomplete. The complete fissures are produced by invaginations of the wall of each cerebral vesicle; and the incomplete fissures are due to the growth of the gyri. Each hemisphere presents six principal fissures, called interlobar fissures, and by means of these it is divided into six lobes. The fissures and lobes are as follows: Interlobar Fissures. Lobes. 1. Fissure of Sylvius. I. Frontal. 2. Fissure of Rolando. 2. Parietal. 3. Parieto-occipital. 3. Occipital. 4. Calloso-marginal. 4. Temporal. 5. Collateral. 5. Island of Reil or Insula. 6. Circular or Limiting. 6. Limbic. Interlobar Fissures.--The fissure of Sylvius, which is the first fissure to appear in the course of development, commences on the inferior surface of the hemisphere at the locus pcrforatus anticus in a depression, called the vallecula Sylvii. From this point it passes horizontally outwards to the Sylvian point on the external surface of the hemisphere, where it divides into three diverging branches. It is a deep cleft, which is overhung poste...
„Über diesen Titel“ kann sich auf eine andere Ausgabe dieses Titels beziehen.
