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.    From Wordnik.com.  [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] Reference

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.    From Wordnik.com.  [Scientific American Supplement, No. 520, December 19, 1885] Reference

Transverse section passing through the sensory decussation.    From Wordnik.com.  [Illustrations. Fig. 714] Reference

Within the chiasma, the optic nerves undergo a partial decussation.    From Wordnik.com.  [IX. Neurology. 5b. The Optic Nerve] Reference

Section of the medulla oblongata at the level of the decussation of the pyramids.    From Wordnik.com.  [Illustrations. Fig. 688] Reference

Section of the medulla oblongata through the lower part of the decussation of the pyramids.    From Wordnik.com.  [Illustrations. Fig. 687] Reference

But in the very moment when the faculty of decussation disappears, it resumes its place, and becomes.    From Wordnik.com.  [Species and Varieties, Their Origin by Mutation] Reference

The optic chiasma is formed by the meeting and partial decussation of the fibers of the two optic nerves.    From Wordnik.com.  [X. The Organs of the Senses and the Common Integument. 1c. The Organ of Sight] Reference

It extends from the level of the decussation of the median fillet to the upper end of the medulla oblongata.    From Wordnik.com.  [IX. Neurology. 4a. The Hind-brain or Rhombencephalon] Reference

The uppermost and lowermost fibers of the Buccinator pass across the lips from side to side without decussation.    From Wordnik.com.  [IV. Myology. 4d. The Muscles of the Mouth] Reference

Its lower part is interrupted by bundles of fibers which cross obliquely from one side to the other, and constitute the pyramidal decussation.    From Wordnik.com.  [IX. Neurology. 4a. The Hind-brain or Rhombencephalon] Reference

Sometimes the former is absent, and in such cases it may be presumed that the decussation of the motor fibers in the medulla oblongata has been complete.    From Wordnik.com.  [IX. Neurology. 3. The Spinal Cord or Medulla Spinalis] Reference

—The downward course of these fasciculi from the pyramids of the medulla oblongata and their partial decussation have already been described (page 761).    From Wordnik.com.  [IX. Neurology. 4a. The Hind-brain or Rhombencephalon] Reference

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.    From Wordnik.com.  [IX. Neurology. 4a. The Hind-brain or Rhombencephalon] Reference

They are continued upward beneath the corpora quadrigemina, and the fibers of the two peduncles undergo a complete decussation ventral to the Sylvian aqueduct.    From Wordnik.com.  [IX. Neurology. 4a. The Hind-brain or Rhombencephalon] Reference

The optic chiasma is formed by the meeting and partial decussation of the optic nerves, which subsequently grow backward as the optic tracts and end in the diencephalon.    From Wordnik.com.  [IX. Neurology. 2. Development of the Nervous System] Reference

The descending portion, the nucleus of the descending tract extends downward as far as the upper end of the nucleus gracilis, and the decussation of the medial lemniscus.    From Wordnik.com.  [IX. Neurology. 4e. Composition and Central Connections of the Spinal Nerves] Reference

Ib. Things entering upon the intellect by a pyramid from without, and thence into the memory by another from within, the common decussation being in the understanding, &c.    From Wordnik.com.  [Literary Remains, Volume 2] Reference

Thus, Mr. Clarke's dissections, confirmed by preparations of Mr. Dean's which I have myself examined, placed the fact of the decussation of the pyramids -- denied by Haller, by.    From Wordnik.com.  [Medical Essays, 1842-1882] Reference

Dr. Sommering has shewn, that a true decussation of the optic nerves in the human subject actually exists, Elem. of Physiology by Blumenbach, translated by C. C.ldwell, Philadelphia.    From Wordnik.com.  [Zoonomia, Vol. II Or, the Laws of Organic Life] Reference

The fibers from the superior colliculus cross the median raphé in the fountain decussation of Meynert and descend as the ventral longitudinal bundle in the reticular formation of the brain-stem.    From Wordnik.com.  [IX. Neurology. 3. The Spinal Cord or Medulla Spinalis] Reference

The physiological experimenter has also made it evident that the decussation of the conductors of sensitive impressions has its seat in the spinal core, and not in the encephalon, as had been supposed.    From Wordnik.com.  [Medical Essays, 1842-1882] Reference

Summing up this description of the hereditary qualities of our twisted teasels and of their mechanical consequences, we may say that the loss of the normal decussation is the cause of all the observed changes.    From Wordnik.com.  [Species and Varieties, Their Origin by Mutation] Reference

Some fibers, termed the anterior external arcuate fibers, emerge from the fissure above this decussation and curve lateralward and upward over the surface of the medulla oblongata to join the inferior peduncle.    From Wordnik.com.  [IX. Neurology. 4a. The Hind-brain or Rhombencephalon] Reference

—The fibers of the medial lemniscus take origin in the gracile and cuneate nuclei of the medulla oblongata, and as internal arcuate fibers they cross to the opposite side in the sensory decussation (page 777).    From Wordnik.com.  [IX. Neurology. 4b. The Mid-brain or Mesencephalon] Reference

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.    From Wordnik.com.  [IX. Neurology. 4a. The Hind-brain or Rhombencephalon] Reference

The motor fibres within the internal capsule form the pyramidal tracts (otherwise called the corticospinal tracts) The pyramidal fibres cross to the other side at the level of the medulla oblongata (called decussation).    From Wordnik.com.  [Recently Uploaded Slideshows] Reference

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.    From Wordnik.com.  [IX. Neurology. 4a. The Hind-brain or Rhombencephalon] Reference

The fibers nearest to the anterior median fissure cross the middle line, forming the decussation of the pyramids, and descend in the opposite side of the medulla spinalis, as the lateral cerebrospinal fasciculus (crossed pyramidal tract).    From Wordnik.com.  [IX. Neurology. 1F. Pathways from the Brain to the Spinal Cord] Reference

There is considerable variation in the extent to which decussation takes place in the medulla oblongata; about two-thirds or three-fourths of the fibers usually decussate in the medulla oblongata and the remainder in the medulla spinalis.    From Wordnik.com.  [IX. Neurology. 1F. Pathways from the Brain to the Spinal Cord] Reference

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.    From Wordnik.com.  [Species and Varieties, Their Origin by Mutation] Reference

693– Transverse section passing through the sensory decussation.    From Wordnik.com.  [IX. Neurology. 4a. The Hind-brain or Rhombencephalon] Reference

714– Transverse section passing through the sensory decussation.    From Wordnik.com.  [IX. Neurology. 4b. The Mid-brain or Mesencephalon] Reference

Trochlear nerve, with 9’, its nucleus of origin, and 9 ", its decussation.    From Wordnik.com.  [Illustrations. Fig. 762] Reference

688– Section of the medulla oblongata at the level of the decussation of the pyramids.    From Wordnik.com.  [IX. Neurology. 4a. The Hind-brain or Rhombencephalon] Reference

687– Section of the medulla oblongata through the lower part of the decussation of the pyramids.    From Wordnik.com.  [IX. Neurology. 4a. The Hind-brain or Rhombencephalon] Reference

(called decussation) in the spinal cord.    From Wordnik.com.  [Buchanan's Journal of Man, April 1887 Volume 1, Number 3] Reference

O, decussation of the anterior pyramids.    From Wordnik.com.  [A Practical Physiology] Reference

Sensory decussation.    From Wordnik.com.  [Illustrations. Fig. 714] Reference