How To Use Gray substance In A Sentence
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The thickened edge of gray substance becomes the gyrus dentatus, the fasciola cinerea and the supra - and subcallosal gyri, while the free edge of the white substance forms the fimbria hippocampi and the body and crus of the fornix.
IX. Neurology. 2. Development of the Nervous System
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The columns (columna fornicis; anterior pillars; fornicolumns) of the fornix arch downward in front of the interventricular foramen and behind the anterior commissure, and each descends through the gray substance in the lateral wall of the third ventricle to the base of the brain, where it ends in the corpus mammillare.
IX. Neurology. 4c. The Fore-brain or Prosencephalon
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When followed backward the dentate gyrus separates from the fimbria at the splenium, loses its incisions and knobs, and as the fasciola cinerea passes over the splenium onto the dorsal surface of the corpus callosum and spreads out into a thin layer of gray substance known as the indusium, which can be traced forward around the genu of the corpus callosum into the gyrus subcallosus.
IX. Neurology. 4e. Composition and Central Connections of the Spinal Nerves
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The large expanse of medullary matter now exposed, surrounded by the convoluted margin of gray substance, is called the centrum ovale majus.
IX. Neurology. 4c. The Fore-brain or Prosencephalon
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The tuber cinereum is a hollow eminence of gray substance situated between the corpora mammillaria behind, and the optic chiasma in front.
IX. Neurology. 4c. The Fore-brain or Prosencephalon
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The most direct path, the tractus olfactomesencephalicus (basal olfactory bundle of Wallenburg), is supposed to arise from cells in the gray substance of the olfactory tract, the olfactory trigone, the anterior perforated substance and the adjoining part of the septum pellucidum.
IX. Neurology. 4e. Composition and Central Connections of the Spinal Nerves
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It consists chiefly of intersegmental fibers which arise from cells in the gray substance, and, after a longer or shorter course, reënter the gray substance and ramify in it.
IX. Neurology. 3. The Spinal Cord or Medulla Spinalis
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The upper surface of the intermediate portion of the corpus callosum is covered by a thin veil of gray substance - the indusium griseum.
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Dorsally, it is partly separated from the gray substance of the quadrigeminal bodies by the fibers of the lemniscus; ventral to it are the medial longitudinal fasciculus, and the formatio reticularis of the tegmentum.
IX. Neurology. 4b. The Mid-brain or Mesencephalon
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In the decussation of the pyramids, the bundles of corticospinal fibers are interposed between the ventral gray matter and the central gray substance.
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Nerve cells are largely aggregated in the gray substance of the brain and medulla spinalis, but smaller collections of these cells also form the swellings, called ganglia, seen on many nerves.
IX. Neurology. 1. Structure of the Nervous System
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The corpora mammillaria (corpus albicantia) are two round white masses, each about the size of a small pea, placed side by side below the gray substance of the floor of the third ventricle in front of the posterior perforated substance.
IX. Neurology. 4c. The Fore-brain or Prosencephalon
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It consists of (a) longitudinal intersegmental fibers which arise from cells in the gray substance, more especially from those of the medial group of the anterior column, and, after a longer or shorter course, reënter the gray substance; (b) fibers which cross in the anterior white commissure from the gray substance of the opposite side.
IX. Neurology. 3. The Spinal Cord or Medulla Spinalis
