How To Use Decussation In A Sentence
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This decussation occurs in the midbrain tegmentum at the level of the inferior colliculi.
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Its lower part is interrupted by bundles of fibers which cross obliquely from one side to the other, and constitute the pyramidal decussation.
IX. Neurology. 4a. The Hind-brain or Rhombencephalon
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Section of the medulla oblongata through the lower part of the decussation of the pyramids.
Illustrations. Fig. 687
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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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The great majority of the pyramidal fibers which arise in the cerebral cortex and descend through the pyramids of the medulla cross in the decussation, most of the remainder forming the uncrossed ventral corticospinal tract.
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The brainstem has been cut through the inferior colliculi and the decussation of the superior cerebellar peduncles.
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The uppermost and lowermost fibers of the Buccinator pass across the lips from side to side without decussation.
IV. Myology. 4d. The Muscles of the Mouth
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The twisted teasels lose their decussation, but in doing so the leaves are not left in a disorderly dispersion, but a distinct new arrangement takes its place, which is to be assumed as the normal one for the ancestors of the teasel family.
Species and Varieties, Their Origin by Mutation
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The axons come from large cells in the stratum opticum and stratum lemnisci and sweep ventrally around the central gray matter of the aqueduct, cross the raphé in the fountain decussation of Meynert and turn downward in the tegmentum in the ventral longitudinal bundle.
IX. Neurology. 1F. Pathways from the Brain to the Spinal Cord
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The trigeminal alone had a spinal root which wandered down for a few centimetres past the decussation of the pyramids to finish at the level of the second cervical nerve.
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The bulky superior cerebellar peduncles cross each other to form the decussation of the superior cerebellar peduncles, located within the midbrain tegmentum.
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Prof. Hamilton, of Aberdeen, claims that the corpus callosum is not a commissure, but the decussation of cortical fibers on their way down to enter the internal and external capsules of the opposite side.
Scientific American Supplement, No. 520, December 19, 1885
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The sensory decussation is the key feature of this section.
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He described the decussation of the optic nerves and the capsule of the crystalline lens, and gave the first clear description that has survived of the structure of the eye.
The Legacy of Greece Essays By: Gilbert Murray, W. R. Inge, J. Burnet, Sir T. L. Heath, D'arcy W. Thompson, Charles Singer, R. W. Livingston, A. Toynbee, A. E. Zimmern, Percy Gardner, Sir Reginald Blomfield
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The trigeminal alone had a spinal root which wandered down for a few centimetres past the decussation of the pyramids.
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The root fibers arising from the trochlear nuclei form a decussation dorsal to the mesencephalic aqueduct, and they are the only cranial nerves that cross completely and that leave the dorsal aspect of the brain stem.
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The decussation of these sensory fibers is situated above that of the motor fibers, and is named the decussation of the lemniscus or sensory decussation.
IX. Neurology. 4a. The Hind-brain or Rhombencephalon
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The fibers converge toward the angle of the mouth, where the central fibers intersect each other, those from below being continuous with the upper segment of the Orbicularis oris, and those from above with the lower segment; the upper and lower fibers are continued forward into the corresponding lip without decussation.
IV. Myology. 4d. The Muscles of the Mouth
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Transverse section passing through the sensory decussation.
Illustrations. Fig. 714
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The pyramids rapidly diminish in size at the level of the decussation, reflecting the fact that the great majority of corticospinal fibers leave the pyramids at the decussation.
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The red arrow, a, a, indicates the course the lateral cerebrospinal fasciculus takes at the level of the decussation of the pyramids; the blue arrow, b, b, indicates the course which the sensory fibers take.
Illustrations. Fig. 687
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When these pyramidal fibers are traced downward it is found that some two-thirds or more of them leave the pyramids in successive bundles, and decussate in the anterior median fissure, forming what is termed the pyramidal decussation.
IX. Neurology. 4a. The Hind-brain or Rhombencephalon
